CCEA Exemplar Scheme of Work: GCSE Double Award Physics REVISED GCSE Scheme of Work Science Double Award Physics This is an exemplar scheme of work which supports the teaching and learning of the Double Award Physics specification Amended June 2012 (Amendments to P46 and 47) CCEA Exemplar Scheme of Work: GCSE Double Award Physics CCEA Exemplar Scheme of Work: GCSE Double Award Physics GCSE Double Award Physics Contents Page Introduction 1 Unit 1: Force and Motion, Energy, Moments and Radioactivity 5 Unit 2: Waves, Sound and Light, Electricity and the Earth and Universe 33 Formula Sheet 66 Resources 67 CCEA Exemplar Scheme of Work: GCSE Double Award Physics CCEA Exemplar Scheme of Work: GCSE Double Award Physics Introduction CCEA has developed new GCSE Science specifications for first teaching from September 2011. This scheme of work has been designed to support you in introducing the new specification. The scheme of work provides suggestions for organizing and supporting students’ learning activities. It is intended to assist you in developing your own scheme of work and should not be considered as being prescriptive or exhaustive. Please remember that assessment is based on the specification which details the knowledge, understanding and skills that students need to acquire during the course. The scheme of work should therefore be used in conjunction with the specification. Published resources and web references included in the scheme of work have been checked and were correct at the time of writing. You should check with publishers and websites for the latest versions and updates. CCEA accepts no responsibility for the content of third party publications or websites referred to within this scheme of work. A Microsoft Word version of this scheme of work is available on the subject micro site on the CCEA website (www.ccea.org.uk/microsites). You will be able to use it as a foundation for developing your own scheme of work which will be matched to your teaching and learning environment and the needs of your students. I hope you find this support useful in your teaching. Best wishes Kevin Henderson Subject Officer Physics E-mail Telephone khenderson@ccea.org.uk 028 9026 1200 (ext 2270) 1 CCEA Exemplar Scheme of Work: GCSE Double Award Physics 2 CCEA Exemplar Scheme of Work: GCSE Double Award Physics CCEA Exemplar Scheme of Work: GCSE Double Award Physics 3 CCEA Exemplar Scheme of Work: GCSE Double Award Physics 4 CCEA Exemplar Scheme of Work: GCSE Double Award Physics Unit 1: Force & Motion, Energy, Moments and Radioactivity 5 CCEA Exemplar Scheme of Work: GCSE Double Award Physics Specification: GCSE Double Award Physics Unit 1: Force and Motion, Energy, Moments and Radioactivity Specification Content Motion 1.1 1.1.1 Learning Outcomes Teaching and Learning Activities Resources Teacher exposition: Pupils use textbooks and/or internet to find a definition of average speed as total distance / time taken Pupils measure the average speed of a trolley moving between fixed points on an inclined plane using a stopwatch and a meter stick (or using light gates, a control box, computer and data-logging software). Inclined planes, stopwatches, meter sticks OR Light-gates, control box, computer and card-carrying trolleys moving on an inclined plane or a linear air-track. Pupils use a spreadsheet or other software to analyze numerical data. Textbooks C2K Computers Pupils plot numerical distance-time data on graph paper and find average speed from linear distance–time graphs, including examples where the object is at rest for part of the time. Pupil worksheet In the context of how science works, students should be able to: Investigate experimentally the quantitative relationships between average speed, distance and time, including the calculation of average speed from linear distance–time graphs and use ICT resources to process measurements and analyse data; 6 Safety/Risk Assessment Normal safety precautions required when using mainspowered equipment Normal safety precautions required when using mainspowered equipment CCEA Exemplar Scheme of Work: GCSE Double Award Physics Specification Content 1.1.1 (cont.) 1.1.2 Learning Outcomes Teaching and Learning Activities In the context of how science works, students should be able to: Distinguish between distance and displacement, speed and velocity; Pupils practice solving numerical problems relating to average speed. Textbooks and/or Pupil worksheets Teacher exposition. Pupils use textbooks and/or internet to discover the nature of a vector and hence the distinction between distance and displacement, speed and velocity. Textbooks C2K computers The distinctions between distance and displacement, speed and velocity are reinforced using numerical examples from a pupil worksheet. Textbooks C2K computers Acceleration 1.1.3 Resources Calculate rate of change of speed (acceleration), as change of speed divided by time taken; Pupils are taught how to obtain the gradient of a linear graph of speed against time and practice their technique on data taken from textbooks or supplied in a pupil worksheet. 7 Safety/Risk Assessment Normal safety precautions required when using mainspowered equipment. CCEA Exemplar Scheme of Work: GCSE Double Award Physics Specification Content Displacement, Velocity and Acceleration 1.1.4 Learning Outcomes Teaching and Learning Activities Resources In the context of how science works, students should be able to: Recall and use the quantitative relationships between displacement, time and average velocity; initial velocity, final velocity, acceleration (retardation) and time. (problems will only be set on motion in one direction); Safety/Risk Assessment Teacher exposition. From definitions of average velocity and acceleration, the pupils are led to discover the relationships: S = average velocity x time and v = u + at (or equivalent) Pupils measure the acceleration of a trolley on a friction compensated runway. (i) using light gates, control box and computer OR (ii) By finding the average velocity of an object starting from rest using stopwatches and metre sticks. Pupil worksheets. 8 Friction compensated runways, trolleys, light gates, control box and computers OR stopwatches and metre sticks. Normal safety precautions required when using mainspowered equipment. CCEA Exemplar Scheme of Work: GCSE Double Award Physics Specification Content Displacement–Time Graphs and Velocity–Time Graphs 1.1.5 Learning Outcomes Teaching and Learning Activities Resources In the context of how science works, students should be able to: Use graphical methods to determine velocity, acceleration and displacement, applying knowledge that: • the slope of a displacement– time graph is the velocity; • the slope of a velocity–time graph is the acceleration; • the area under a velocity–time graph is the displacement. Computer simulation such as Crocodile Physics, Chapter 1 – Motion or Learning NI – Motion Teacher exposition. Pupils solve graphical problems taken from textbooks and/or worksheets. Pupils prepare a PowerPoint presentation and deliver it to their peers. 9 Textbooks C2K Computers Safety/Risk Assessment Normal safety precautions required when using mainspowered equipment CCEA Exemplar Scheme of Work: GCSE Double Award Physics Specification Content Newton’s Laws Learning Outcomes Teaching and Learning Activities Resources In the context of how science works, students should be able to: 1.1.6 Recall and understand that forces arise between objects and that the forces on these objects are equal and opposite and that friction is a force that always opposes motion; Teacher exposition. Computer simulation, such as Crocodile Physics, Chapter 1 – Motion & Forces OR LearningNI – Motion & Forces. 1.1.7 Investigate experimentally Newton’s first and second Laws, for example using an air track and data logger, or a computer simulation, to study the effect of balanced and unbalanced forces on an object and through mathematical modelling derive the relationship between resultant force, mass and acceleration. Pupils carry out experimental investigations on Newton’s 1st and 2nd Laws using a linear air track and data logger OR trolleys on friction-compensated runways and light gates / ticker-timers OR computer simulations (LearnPremiumNI>> KS4 Physics>> Relating force mass acceleration) Laws of Motion videos (Science in Action). 1.1.8 Calculate the resultant of two onedimensional forces; and 1.1.9 Recall and use the equation resultant force = mass x acceleration; Pupils practise finding resultant of two collinear forces from examples in textbooks and/or worksheets. Teacher exposition. Pupils practise the application of F=ma from examples in textbooks and/or worksheets. 10 Safety/Risk Assessment Normal safety precautions required when using mainspowered equipment. Light-gates, control box, C2K computers and card-carrying trolleys OR carts on a linear air track OR trolleys, frictioncompensated runways and tickertimers. Textbooks C2K computers Normal safety precautions required when using mainspowered equipment. CCEA Exemplar Scheme of Work: GCSE Double Award Physics Specification Content Mass, Density and Weight 1.1.10 Learning Outcomes Teaching and Learning Activities Resources In the context of how science works, students should be able to: Distinguish between the weight and mass of an object, knowing that an object of mass 1 kg has a weight of 10 N, and be able to calculate the weight of an object when given the mass in kilograms using W = mg; Pupils carry out book or web-based research on the differences between mass and weight and the strength of the gravitational field on different planets. Teacher exposition leading to: W = mg Pupils practise the application of W = mg from example worksheets. 11 Textbooks C2K Computers Safety/Risk Assessment Normal safety precautions required when using mainspowered equipment. CCEA Exemplar Scheme of Work: GCSE Double Award Physics Specification Content 1.1.11 Learning Outcomes Teaching and Learning Activities Resources Safety/Risk Assessment Investigate experimentally the relationship between the mass and volume of liquids, regular solids and irregular solids and use ICT to process the data. Pupils investigate the relationship between mass and volume for (i) Liquids, such as water, ethanol and brine and (ii) regularly shaped blocks (cuboids) of various metals such as aluminium, copper and lead. Pupils measure the volume of different irregular solids of the same material and of known mass by displacement of water. For experiments involving liquids: Burettes, beakers and top-pan balances. For regular solids experiments: Rulers and top-pan balances. For irregular solids: Eureka cans and/or measuring cylinders. The usual precautions need to be taken to avoid the breakage of glassware and pupils need to be advised of the local procedures to avoid harm from broken glass. Protective glasses need to be worn when using liquids. 1.1.12 Analyse and interpret the data gathered in 1.1.11 to derive the relationship between mass and volume. In each experimental exercise in 1.1.12, pupils plot and interpret graphs of mass against volume. 1.1.13 Recall and use the equation density = mass/volume to solve simple problems; Pupil research and/or teacher exposition leading to: density = mass/volume The experiments in 1.1.12 lend themselves to application of datalogging software and/or the use of a spreadsheet or graph-plotting package to analyse the data. In the context of how science works, students should be able to: 12 CCEA Exemplar Scheme of Work: GCSE Double Award Physics Specification Content 1.1.13(cont.) Learning Outcomes Teaching and Learning Activities Resources In the context of how science works, students should be able to: Recall and use the units of density, Pupils practise the application of g/cm3 and kg/m3; density = mass / volume and use of units from examples in worksheets and/or textbooks. Safety/Risk Assessment Textbooks and/or worksheets. Kinetic Theory 1.1.14 Use the Kinetic Theory to explain qualitatively the changes of state that occur between solids, liquids and gases and relate these to the difference between the densities of solids, liquids and gases. Teacher exposition. Computer simulations e.g. LearningNI >> KS3 Science >> Solids, Liquids Gases for animations showing the qualitative differences between solids, liquids and gases and the differences in their densities. Pupils prepare posters to illustrate the Textbooks differences in the three states of matter. C2K computers 13 Normal safety precautions required when using mainspowered equipment. CCEA Exemplar Scheme of Work: GCSE Double Award Physics Specification Content Circular Motion Learning Outcomes Teaching and Learning Activities Resources In the context of how science works, students should be able to: 1.1.15 Describe some examples of circular motion explaining how the force acting on an object causes this type of motion. Teacher exposition. Pupils engage in a brainstorming session to identify as many examples of circular motion as possible and report back to their peers. Pupils invoke Newton’s first law to recognise that a centripetal force is involved in circular motion. 1.1.16 Investigate qualitatively the factors affecting the centripetal force for an object moving in a circle. Pupils whirl different rubber bungs at the end of a string in a horizontal circle and observe that the lifting force on the weights attached to the other end of the string increases with speed of rotation and mass of the bung, and decreases with the radius of the circle. 1.1.17 Recall that: • the direction of the centripetal force is towards the centre of the circle; • it increases with the mass and the speed of the object and decreases as the radius of the circle increases; and • if the force is removed, the object will move away at a tangent to the circle; Teacher exposition. Pupils carry out book- or web-based research on centripetal forces. e.g. LearningNI >> KS4 >> Physics >> Centripetal Pupils led to conclude that the object moves away at a tangent when the centripetal force is removed, so the presence of the centripetal force is the cause of circular motion. See also 1.7.2 14 String, rubber bungs, plastic cylinders (such as are used in inexpensive ballpoint pens) slotted masses, mass carriers, stopwatches, crocodile clips. Safety/Risk Assessment Pupils need to ensure the bung is tied tightly to the string (so that it does not fly off) and that they whirl the bung at a moderate speed. Safety glasses must be worn. CCEA Exemplar Scheme of Work: GCSE Double Award Physics Specification Content Momentum 1.1.18 Learning Outcomes Teaching and Learning Activities Resources In the context of how science works, students should be able to: Recall and use the equation: momentum = mass × velocity. Teacher exposition. Pupils carry out problems based on the definition from textbooks and/or worksheets. 1.2.1 Investigate, in terms of the Principle of Conservation of Energy, energy transfers involving the following forms of energy: chemical, heat, electrical, sound, light, magnetic, kinetic and potential (gravitational and strain); Teacher exposition. Pupils use web-based resources to identify and illustrate energy transfers showing application of the Principle of Conservation of Energy. Pupils illustrate their findings and make a presentation to their peers. 1.2.2 Draw and interpret energy transfer diagrams for the investigations carried out in 1.9.1 and appreciate their limitations; Pupils practise drawing and interpreting Paper and drawing energy transfer diagrams and appreciate that materials. few such diagrams show all energy transfers taking place or the amount of energy involved. Describe a range of renewable energy resources, use primary and secondary sources to investigate the effect on the environment of the use of renewable and nonrenewable energy resources and recall their findings. Teacher exposition. Textbooks Pupils use textbooks and/or web-based C2K computers. resources to research a range of renewable energy resources such as solar, hydroelectric, biomass, geothermal energy, wind, waves and tides and use primary and secondary sources to investigate the effects on the environment of the use of renewable Forms of Energy Textbooks and/or Worksheets Energy Resources 1.2.3 15 Safety/Risk Assessment Normal safety precautions required when using mainspowered equipment. CCEA Exemplar Scheme of Work: GCSE Double Award Physics Specification Content 1.2.3(cont.) Learning Outcomes Teaching and Learning Activities Resources In the context of how science works, students should be able to: Safety/Risk Assessment and non- renewable energy resources, (such as fossil fuels, nuclear energy). Pupils present their findings to their peers. Efficiency 1.2.4 Recall, understand and use the equation efficiency = useful output energy total input energy; Teacher exposition. Textbooks Pupils practice applying the energy equation C2K computers. using examples taken from textbooks and/or worksheets. 1.2.5 Describe and explain various ways of making better use of energy; Pupils prepare a PowerPoint presentation and deliver it to their peers. 1.2.6 Review primary and secondary sources relating to the efficiency of domestic appliances; Pupils engage in individual research or group work using web-based resources to explore the range of efficiency rating labels currently in use (e.g. EU label, SEDBUK label, BRFC label etc). Pupils use the web to download and compare manufacturers’ data for various domestic appliances, interpret the information provided in terms of efficiency and tabulate it. School library resources. C2K computers Pupils use textbooks and/or web-based resources to investigate the changes needed in their homes to reduce their energy consumption. Textbooks C2K computers. 16 Normal safety precautions required when using mainspowered equipment. Textbooks C2K computers. Normal safety precautions required when using mainspowered equipment. CCEA Exemplar Scheme of Work: GCSE Double Award Physics Specification Content Work 1.2.7 Learning Outcomes Teaching and Learning Activities In the context of how science works, students should be able to: Recall and use the equation work = force × distance and that the work done equals the amount of energy transferred; Teacher exposition. Pupils gain practice applying the equation for work using examples taken from worksheets. Power 1.2.8 Recall and use the equations power = energy transferred time taken Teacher exposition. Pupils gain practice applying the equation for power using examples taken from worksheets. and power = work done time taken to calculate power, work done, time taken or energy transferred; 17 Resources Safety/Risk Assessment Normal safety precautions required when using mainspowered equipment. CCEA Exemplar Scheme of Work: GCSE Double Award Physics Specification Content 1.2.9 Learning Outcomes Teaching and Learning Activities Resources In the context of how science works, students should be able to: Plan and carry out experiments to measure personal power and the output power of an electric motor and evaluate the validity and reliability of their data; Experimental investigations to find the output power if a small electric motor raising the load and the output power of a pupil running up a flight of stairs. Safety/Risk Assessment Small 12 V electric motors, low-voltage power supply units, string, slotted masses, stopwatches, bathroom scales, access to a staircase. Normal safety precautions required when using mainspowered equipment. If efficiency investigation is carried out, additional resources are required: ammeters and voltmeters ( or joule-meters) Normal safety precautions required when using mainspowered equipment. Pupils reflect on how repetition and averaging enhances the reliability of data and carefully considered experimental design enhances data validity. The first investigation lends itself to a practice controlled assessment task to determine how the efficiency of a small electric motor changes with the load. 18 CCEA Exemplar Scheme of Work: GCSE Double Award Physics Specification Content Kinetic & Potential Energy Learning Outcomes In the context of how science works, students should be able to: 1.2.10 Recall and use the equations kinetic energy = ½ mass × velocity2)(½ mv2) potential energy = mass × gravitational field strength × height. (mgh) Teaching and Learning Activities Resources Safety/Risk Assessment Teacher exposition. Pupils engage in group work or individual research using text-books and/or webbased resources. Pupils practice applying the equations for work using examples taken from worksheets. Textbooks C2K computers. Normal safety precautions required when using mainspowered equipment. Teacher exposition. Pupils use textbooks and/or web-based resources to find and learn a formal definition of centre of gravity. Pupils locate the position of the centre of gravity of different objects by suspension methods e.g. uniform metre rule, snooker cue, retort stand, irregular paper lamina. Pupils explore why it is that for maximum stability the centre of gravity should be as low as possible and the base area as large as possible. Metre rules, snooker cue, retort stands, boss heads, clamps, paper, scissors, string, pendulum bobs, drawing boards, drawing pins. Normal safety precautions need to be taken when using sharp objects such as scissors and drawing pins. Centre of Gravity 1.3.1 Recall the meaning of centre of gravity and explain how its position affects the stability of an object. 19 CCEA Exemplar Scheme of Work: GCSE Double Award Physics Specification Content Moment of a Force 1.3.2 Learning Outcomes Teaching and Learning Activities Resources In the context of how science works, students should be able to: Recall and use the equation Moment = force x perpendicular distance from the pivot and understand the implications of this; Teacher Exposition. Pupils develop the idea of a moment by considering the action of different classes of lever e.g. crowbars, wheelbarrows and fishing rods. Textbooks C2K computers. Pupils establish the idea that a lever can be a force multiplier or a distance multiplier. Pupils practise applying the equation for Textbooks moment, using examples taken from C2K computers. textbooks and/or worksheets, to reinforce the concept of the moment of a force about a pivot. 20 Safety/Risk Assessment CCEA Exemplar Scheme of Work: GCSE Double Award Physics Specification Content Principle of Moments 1.3.3 Learning Outcomes Teaching and Learning Activities Resources In the context of how science works, students should be able to: Plan and carry out experiments to verify the Principle of Moments and use it to calculate the size of a force or its distance from the pivot, when an object is balanced under the turning effects of no more than two forces, one of which could be the object’s weight. Pupils suspend a metre rule horizontally and then attach weights at each side of the point of suspension. They change the position of the weights so that the rule returns to the horizontal position. They repeat the exercise for different weights and tabulate their results to show that the ACWM is equal to the CWM when there is equilibrium. Pupils learn a formal statement of the Principle of Moments. Metre rules, string, retort stands, boss heads, clamps, slotted masses. Pupils suspend a metre rule its centre of mass, attach a known weight and at one side and balance it with an unknown weight at the other. Pupils then apply the Principle of Moments to find the unknown weight of the metre rule. Metre rules, string, retort stands, boss heads, clamps, slotted masses. Pupils suspend a metre rule at a point other than its centre of mass. They then suspend a known weight and change its position to restore equilibrium. Finally they apply the Principle of Moments to find the unknown weight of the metre rule. Metre rules, string, retort stands, boss heads, clamps, slotted masses, object of unknown weight. 21 Safety/Risk Assessment Normal safety precautions need to be taken when using suspended (and potentially heavy) masses against injuries due to falling weights. masses against injuries due to falling weights. Normal safety precautions need to be taken when using suspended (and potentially heavy) masses against injuries due to falling weights. CCEA Exemplar Scheme of Work: GCSE Double Award Physics Specification Content 1.3.3(cont.) Learning Outcomes Teaching and Learning Activities Resources In the context of how science works, students should be able to: Safety/Risk Assessment Teacher exposition. Pupils practice applying the Principle of Moments using examples taken from worksheets. Structure of the atom 1.4.1 Research the historical development of the model of atomic structure from the ‘plum pudding’ model to the present Rutherford-Bohr model; Teacher exposition. Pupils engage in group work or individual research using text-books and/or webbased resources to see the reason why J.J. Thomson proposed his plum pudding model and the contribution made by the Irish physicist G. J. Stoney. Pupils prepare and deliver a PowerPoint presentation to their peers. 22 Textbooks C2K computers. Normal safety precautions required when using mainspowered equipment. CCEA Exemplar Scheme of Work: GCSE Double Award Physics Specification Content 1.4.2 1.4.3 Learning Outcomes Teaching and Learning Activities Resources In the context of how science works, students should be able to: Describe the structure of atoms in terms of protons, neutrons and electrons; Teacher exposition. Pupils engage in group work or individual research using text-books and/or webbased resources. e.g. LearningNI >> Library >> Post 16 >> Nuclear Physics >> Thompson’s Atomic Model/and Rutherford’s Atomic model. Recall the relative charge and relative mass of protons, neutrons and electrons; Teacher exposition. Pupils view teachers-delivered PowerPoint presentation from Footprints-Science‘Physical Process’: OR edited PowerPoint slides from LearningNI>>Library>>KS4>>Physics> >Radioactivity. Pupils make notes on this material. 23 Safety/Risk Assessment Normal safety precautions required when using mainspowered equipment. Textbooks C2K computers. Normal safety precautions required when using mainspowered equipment. CCEA Exemplar Scheme of Work: GCSE Double Award Physics Specification Content Structure of the Nucleus Learning Outcomes Teaching and Learning Activities Resources In the context of how science works, students should be able to: 1.4.4 Describe a nucleus in terms of atomic number Z and mass number A, using the notation AZX; Teacher exposition. Pupils view teacher-delivered PowerPoint presentation from Footprints-science‘Physical Process’: OR edited PowerPoint slide from LearningNI>> Library>>KS4>>Physics>>Radioactivity Pupils then make notes on this material. 1.4.5 Explain what an isotope is; Teacher exposition. Textbooks Pupils view teacher-delivered PowerPoint C2K computers presentation from Footprints-science‘Physical Process’: OR edited PowerPoint slide from LearningNI>> Library>>KS4>>Physics>>Atomic Structure and the Periodic Table. And make notes on this material. Pupils find a definition of an isotope from the above presentation and make notes on this material. Pupils solve problems on the definition of isotopes from textbooks and/or worksheets. 24 Safety/Risk Assessment CCEA Exemplar Scheme of Work: GCSE Double Award Physics Specification Content Radioactivity Learning Outcomes Teaching and Learning Activities Resources In the context of how science works, students should be able to: 1.4.6 Recall that some nuclei are unstable and disintegrate emitting alpha, beta or gamma radiation randomly and spontaneously, and that such nuclei are described as radioactive; Teacher exposition. Pupils view teacher-delivered PowerPoint presentation from Footprints-science‘Physical Process’: OR edited PowerPoint slide from LearningNI>> Library>>KS4>>Physics>>Radioactivity Pupils then make notes on this material. Textbooks C2K computers 1.4.7 Recall that alpha particles are helium nuclei consisting of two protons and two neutrons, beta particles are fast electrons and gamma radiation is an electromagnetic wave of high energy; Teacher exposition. This above presentation also covers the material for 1.4.9. Pupils make notes on the nature of radioactivity, the properties and nature of the emissions. Pupils prepare a poster for display on the nature of radioactive emissions. Textbooks C2K computers 1.4.8 Describe nuclear disintegrations in terms of equations involving mass numbers and atomic numbers; Pupils view teacher-delivered PowerPoint presentation from Footprints-Science 'Physical Processes' OR edited PowerPoint slides from LearningNI >> Library >> KS4 >> Physics >> Radioactivity Pupils then make notes on this material. Pupils practise solving problems involving equations representing nuclear decay taken from worksheets. Textbooks C2K computers 25 Safety/Risk Assessment Normal safety precautions required when using mainspowered equipment Normal safety precautions required when using mainspowered equipment. There is wide-ranging guidance found in the COSHH regulations. Teachers may also get help and advice from CLEAPSS and from the Institute of Physics. CCEA Exemplar Scheme of Work: GCSE Double Award Physics Specification Content 1.4.9 Learning Outcomes Teaching and Learning Activities Resources Safety/Risk Assessment The teacher demonstrates the properties of the radiations using a GM-tube, scaler (or ratemeter) and radioactive sources. OR Pupils investigate the properties of radioactive emissions using the web-based resource LearningNI >> Library >> KS4 >> Physics >> Radioactivity and selecting the relevant sub-unit. GM-tube, source holder, meter stick, scaler (or ratemeter) and radioactive sources (such as are found in the PANAX kits) Pupils prepare a table showing the nature and properties of α β and γ radiations Textbooks C2K computers A particularly useful and comprehensive document is: “Managing Ionising Radiations and Radioactive Substances in Schools, etc L93 (September 2008)” Available free on-line from CLEAPSS. Teachers may also get advice from the Radiation Protection Officer at their ELB. In the context of how science works, students should be able to: Recall, through demonstrations or computer simulations, the range of alpha, beta and gamma radiations, that alpha radiation is stopped by a few centimetres of air or a thin sheet of paper, that beta radiation is stopped by several metres of air or a thin sheet of aluminium and that gamma radiation easily passes through all of these but can be blocked by lead; 26 OR CCEA Exemplar Scheme of Work: GCSE Double Award Physics Specification Content 1.4.10 1.4.11 Learning Outcomes Teaching and Learning Activities Resources In the context of how science works, students should be able to: Safety/Risk Assessment Know what background activity is, its source and how it is taken into account when measurements of activity are taken; Teacher exposition. Pupils view the excellent introduction to background radiation is found at: LearningNI >> Library >> KS4 >> Physics >> Radioactivity (higher) Pupils then measure the background count using a GM-tube and scaler (or ratemeter) and make notes on the experiment. This experiment does not involve the use of any radioactive sources. GM-tube, co-axial lead, scaler and stopwatch (or ratemeter). Normal safety precautions required when using mainspowered equipment. See also 1.4.11. Know what ionisation is and recall that radioactive emissions cause dangerous ionisations and the steps taken to minimise the risk to those who use ionising radiations; Teacher exposition. Pupils engage in group work or individual research using text-books and/or webbased resources, investigating the nature and causes of ionization and the steps taken in medical, industrial and educational establishments to minimize the risks to users. Pupils present their findings to their peers. Textbooks C2K computers Normal safety precautions required when using mainspowered equipment. 27 CCEA Exemplar Scheme of Work: GCSE Double Award Physics Specification Content 1.4.12 Learning Outcomes Teaching and Learning Activities Resources In the context of how science works, students should be able to: Through mathematical modelling, based on demonstrations or computer simulations, explain the meanings of the term half-life, carry out simple calculations involving half-life and be able to determine half-life from appropriate graphs; Safety/Risk Assessment An excellent simulation of radioactive decay Textbooks and half–life is available from: LearningNI C2K computers >> Library >> KS4 >> Physics >> Radioactive Decay (whiteboard). Pupils view and then make notes on this material. Normal safety precautions required when using mains powered equipment Teacher exposition. Using the definition of half-life, pupils enhance their problem-solving skills on mathematical and graphical problems with applications taken from examples in textbooks and/or worksheets. Normal safety precautions required when using mainspowered equipment. 28 Textbooks C2K computers CCEA Exemplar Scheme of Work: GCSE Double Award Physics Specification Content Nuclear Fission & Fusion Learning Outcomes Teaching and Learning Activities Resources In the context of how science works, students should be able to: Safety/Risk Assessment 1.4.13 Describe nuclear fission in simple terms and be aware that it is a form of energy used in the generation of electricity (fission equations are not required); Teacher exposition. Pupils use text-books and/or web-based resources to investigate the meaning of nuclear fission. Normal safety precautions required when using mainspowered equipment. 1.4.14 Know that for fission to occur the uranium 235 or plutonium 239 nucleus must first absorb a neutron and then split into two smaller nuclei and release two or three fission neutrons; Teacher exposition. Pupils use text-books and/or web-based resources such as LearningNI >> Library >> KS4 >> Physics to investigate the meaning of nuclear fission. Normal safety precautions required when using mainspowered equipment. 1.4.15 Know that the fission neutrons Teacher exposition. Dominoes. may go on to start a chain reaction; Pupils construct a model of a chain reaction using dominoes. 1.4.16 Discuss and debate some of the political, social, environmental and ethical issues relating to the use of nuclear energy to generate electricity; Pupils use text-books and/or web-based resources to research some of the political, social, environmental and ethical issues relating to the use of nuclear energy to generate electricity and then debate them with each other. 29 Normal safety precautions required when using mainspowered equipment. CCEA Exemplar Scheme of Work: GCSE Double Award Physics Specification Content 1.4.17 1.4.18 Learning Outcomes Teaching and Learning Activities Resources In the context of how science works, students should be able to: Safety/Risk Assessment Describe nuclear fusion in simple terms and be aware that it is the source of a star’s energy; Teacher exposition. Pupils use text-books and web-based resources to discover that fusion is the combination of two or more light nuclei to form a much heavier nucleus with the consequent release of a vast quantity of energy and that this process can only occur when the particles are moving with such kinetic energy that the electrostatic repulsive force can be overcome. Pupils investigate the source of the Sun’s energy and discuss their findings with their peers. Textbooks C2K computers Normal safety precautions required when using mainspowered equipment. Describe nuclear fusion in terms of an equation involving mass numbers and atomic numbers ; Teacher exposition. Pupils use text-books and web-based resources to research the stellar hydrogen fusion cycle and make brief notes on the nature of the nuclear reactions taking place, such as: Textbooks C2K computers Normal safety precautions required when using mainspowered equipment. 30 CCEA Exemplar Scheme of Work: GCSE Double Award Physics Specification Content 1.4.19 Learning Outcomes Teaching and Learning Activities Resources In the context of how science works, students should be able to: Appreciate the potential of nuclear fusion to solve the world’s energy needs provided the technological difficulties of fusion reactors can be overcome. Teacher exposition. Textbooks Pupils use text-books and web-based C2K computers resources to identify the technological problems associated with controlled nuclear fusion (such as temperature and containment) and discover that fusion offers tremendous benefits (such as an almost limitless supply of fuel in sea-water and little hazardous waste) if those technological problems can be overcome. 31 Safety/Risk Assessment Normal safety precautions required when using mainspowered equipment. CCEA Exemplar Scheme of Work: GCSE Double Award Physics 32 CCEA Exemplar Scheme of Work: GCSE Double Award Physics Unit 2: Waves, Sound and Light, Electricity, and the Earth and Universe 33 CCEA Exemplar Scheme of Work: GCSE Double Award Physics Specification: GCSE Double Award Physics Unit 2: Waves, Sound and Light, Electricity, and the Earth and Universe Specification Content Waves 2.1 2.1.1 Learning Outcomes Teaching and Learning Activities Resources In the context of how science works, students should be able to; Recall that waves transfer energy from one point to another through vibrations and distinguish between transverse and longitudinal waves in terms of the motion of the particles of the medium, recalling sound and ultrasound as examples of longitudinal waves; and water waves and electromagnetic waves as examples of transverse waves; Teacher Exposition Video from ELBs “Introduction to Waves”, originally broadcast by ITV – Video reference “151 Waves (SB)”, lasting 4 minutes. The video distinguishes between transverse and longitudinal waves in terms of particle movement and identifies many different types of wave. Demonstrations with slinky spring. Pupils note the difference between transverse and longitudinal waves in terms of the motion of the particles of the medium. Pupils use web-based resources to find definitions of transverse and longitudinal waves, illustrate with diagrams and list examples. 34 Video from ELBs “Introduction to Waves” Slinky springs Textbooks C2K Computers Safety/Risk Assessment Normal safety precautions required when using mains powered equipment. Safety glasses/goggles with springs. CCEA Exemplar Scheme of Work: GCSE Double Award Physics Specification Content 2.1.2 Learning Outcomes Teaching and Learning Activities Resources In the context of how science works, students should be able to: Recall the meaning of frequency, wavelength and amplitude of a wave, and recall and use the quantitative relationship v = fλ between frequency, wavelength and speed of a wave; Video above discusses frequency and wavelength (but not amplitude or speed). Safety/Risk Assessment Pupil worksheets Textbooks C2K Computers Pupils use textbooks and/or internet to find meaning of the frequency, wavelength and amplitude of a wave and illustrate their findings with diagrams. 35 Normal safety precautions required when using mains powered equipment. CCEA Exemplar Scheme of Work: GCSE Double Award Physics Specification Content 2.1.3 Learning Outcomes Teaching and Learning Activities In the context of how science works, students should be able to: Describe, using simple wavefront diagrams, how plane waves are reflected at plane barriers and refracted at plane boundaries, based on their observations using ripple tanks or computer simulations. Computer Simulation as on LearningNI website (Learnpremium) - Library >> Key Stage 4 >> Physics >> Waves, Sound & Light. Teacher exposition to develop the wave equation. Pupils practise solving numerical problems relating to v = fλ from Textbook and/or worksheets. Teacher exposition. Experimental demonstrations using a ripple tank, stroboscope and plane water waves generated by a straight edge vibrator to show: • Reflection of water waves from plane barriers and • Refraction of water waves passing over a plane boundary from deep water to shallow water and from shallow water to deep water. Pupils illustrate the results of these demonstrations diagrammatically. 2.1.4 Resources Explore and recall the analogy between the reflection and refraction of water waves and the reflection and refraction of light (see also 2.1.8, 2.1.10 and 2.1.11); Teacher exposition. Students led to see the analogy between water waves and light waves in terms of their behaviour in reflection and refraction. 36 Pupil worksheets. Ripple tank kits (to include small electric motors powering plane wave generators, projection lamps and stroboscopes), plane barriers (to illustrate reflection) and glass blocks (to provide deep and shallow water regions in the ripple tank). Safety/Risk Assessment Normal safety precautions required when using mains powered equipment. Normal safety precautions required when using mains powered equipment. CCEA Exemplar Scheme of Work: GCSE Double Award Physics Specification Content 2.1.5 Learning Outcomes Teaching and Learning Activities Resources In the context of how science works, students should be able to: Describe some applications of echoes and carry out calculations on the echo principle, to include radar and sonar, and describe some contemporary applications of ultrasound in industry and medicine; Teacher Exposition With examples taken from textbooks and/or worksheets pupils practise use of the echo principle equation. distance = speed x time This section on the application of echoes should be read in conjunction with the contemporary applications of ultrasound in industry (such as non-destructive testing of metals, wood, plastics and ceramics, drying cereal crops, cleaning jewellery, identification in high security areas, industrial welding, SONAR etc) and in medicine (such as cleaning surgical instruments, echo-cardiology, medical imaging, dental hygiene, cataract surgery, measurement of blood flow etc). Pupils use textbooks and/or web-based resources to find and describe as many contemporary applications as they can of ultrasound in industry and medicine and present their findings to their peers. 37 Safety/Risk Assessment Textbooks and/or Pupil worksheets Textbooks C2K Computers Normal safety precautions required when using mains powered equipment. CCEA Exemplar Scheme of Work: GCSE Double Award Physics Specification Content Electro-magnetic Waves Learning Outcomes Teaching and Learning Activities Resources In the context of how science works, students should be able to: Safety/Risk Assessment 2.1.6 Distinguish between the different regions of the electromagnetic spectrum (radio waves, microwaves, infra red, visible light, ultra violet, X-rays and gamma rays) in terms of their wavelength and frequency, and be able to arrange them in order of wavelength and recall that they all travel at the same speed in a vacuum; Teacher exposition Pupils use textbooks and/or internet to find out what is meant by the electromagnetic spectrum, and the principal regions within it. The Learning NI website (Learnpremium) and lgfl.skoool.co.uk are both useful resources for teaching KS4 ideas on electromagnetic spectrum. Textbooks C2K Computers Normal safety precautions required when using mains powered equipment. 2.1.7 Research the uses and dangers of electromagnetic waves and recall their findings; Pupils prepare a poster or give a PowerPoint presentation showing these regions in order of wavelength and/or frequency and the uses, dangers and fundamental properties common to all electromagnetic waves. Textbooks C2K Computers Normal safety precautions required when using mains powered equipment. 38 CCEA Exemplar Scheme of Work: GCSE Double Award Physics Specification Content Reflection of Light 2.1.8 2.1.9 Learning Outcomes Teaching and Learning Activities Resources In the context of how science works, students should be able to: Investigate how light is reflected by a plane mirror and recall that the angle of incidence equals the angle of reflection, and apply this rule in practical situations. Investigate through ray tracing the properties of the image seen in a plane mirror and use the properties to solve simple problems. Safety/Risk Assessment Teacher exposition Pupils carry out the traditional experiment using low voltage ray boxes, mirrors and a protractor to confirm the law of reflection. Low voltage ray boxes, mirrors and rulers. Ray boxes can become very hot. Pupils need to be warned to take the usual precautions. With examples taken from worksheets pupils practice use of the Law of Reflection of Light to solve simple problems. Pupils use internet to investigate practical applications of reflection (e.g. to image formation in a mirror) Ray boxes, plane mirrors, blue-tack, white paper, pencils and protractors. Broken glassware is hazardous and pupils need to be warned of the appropriate safety procedures. Teacher exposition Pupils carry out the traditional experiment using low voltage ray boxes, mirrors and rulers to determine the properties of the image seen in a plane mirror: • same distance behind mirror as object is in front of it • laterally inverted • same size as object • virtual Ray boxes, plane mirrors, blue-tack, white paper, pencils and protractors Normal safety precautions required when using mains powered equipment. 39 CCEA Exemplar Scheme of Work: GCSE Double Award Physics Specification Content Refraction of Light 2.1.10 2.1.11 Learning Outcomes Teaching and Learning Activities Resources In the context of how science works, students should be able to: Observe the refraction of light as it passes from air into glass and air into water and vice-versa, and use ray tracing to measure the angles of incidence and refraction. Recall and understand that when light slows it bends towards the normal and the converse (a knowledge of Snell’s Law is not expected); Teacher exposition With a protractor, pupils carry out traditional experiments using low voltage ray boxes, glass or perspex blocks, water contained in thin, rectangular perspex containers to confirm the behaviour of light refracting at air/glass, glass/air, air/water and water/air boundaries. Pupils draw diagrams to show the refraction of light at air/glass, glass/air, air/water, and water/air boundaries. 40 Low voltage ray boxes, 12 V power supply units, rectangular glass or perspex blocks, water contained in thin, rectangular perspex containers, blue-tack, white paper, pencils, protractors. Safety/Risk Assessment Ray boxes can become very hot. Pupils need to be warned to take the usual precautions. Broken glassware is hazardous and pupils need to be warned of the appropriate safety procedures. CCEA Exemplar Scheme of Work: GCSE Double Award Physics Specification Content Dispersion of Light 2.1.12 Learning Outcomes Teaching and Learning Activities Resources In the context of how science works, students should be able to: Investigate how light is dispersed by prisms and recall that a spectrum can be produced because different colours of light travel at different speeds in the glass and the greater the amount of refraction the greater the change of speed; Teacher exposition Pupils carry out the classical experiment to produce a spectrum of visible light using a ray box, triangular glass prism and white paper screen. Pupils infer from experimental and computer simulations that light is faster in air than in glass and that red light is faster in glass than violet light because it bends least. 41 Low voltage ray boxes, 12 V power supply units, triangular glass or perspex blocks, blue-tack, white paper, pencils, protractors. Textbooks C2K Computers Safety/Risk Assessment Normal safety precautions required when using mains powered equipment. CCEA Exemplar Scheme of Work: GCSE Double Award Physics Specification Content Static Charge Learning Outcomes Teaching and Learning Activities Resources In the context of how science works, students should be able to: Safety/Risk Assessment 2.2.1 Recall that insulating materials can be charged by friction and explain this in terms of transfer of electrons, and understand that positively charged objects have a deficiency of electrons and negatively charged objects have a surplus of electrons; The topic can be introduced experimentally by rubbing insulating materials (polythene, cellulose acetate, etc) and metals (copper, iron etc) with a duster and observing that only the insulators cause an attractive force on small pieces of paper. Pupils use textbook and/or web-based resources to explain charging as an electron transfer process. Rods of polythene, cellulose acetate, copper, iron and glass, small pieces of paper. Normal safety precautions required when using mains powered equipment. 2.2.2 Investigate the forces between charged objects and recall that objects carrying the same type of charge repel each other, while objects carrying different types of charge attract each other, and that a charged object can exert an attractive force on an uncharged object and explain the Attraction experiments involve (i) the rubbing of an inflated balloon on a woollen duster and then allowing it to stick to a wall; (ii) shaking a clear plastic bag of lentils and observing that many adhere to the bag’s side bag; (iii) causing a metre stick on an inverted evaporating basin to rotate when a charged rod is brought near. Repulsion is demonstrated by (i) hanging charged balloons from threads and bringing them close together; (ii) running hair straighteners through long hair; (iii) the hair-raising experiment using a Van de Graaff generator. Balloons, string, woollen dusters, plastic bags containing lentils, metre sticks, evaporating basins. Normal safety precautions required when using mains powered and EHT equipment such as a Van de Graaff generator. phenomenon; 42 Wooden stands, balloons, silk thread, hair-straighteners, Van de Graaff generator, polystyrene box (for use with Van de Graaff generator). CCEA Exemplar Scheme of Work: GCSE Double Award Physics Specification Content 2.2.2 (cont.) Learning Outcomes Teaching and Learning Activities Resources In the context of how science works, students should be able to: Safety/Risk Assessment Teacher exposition. Pupils need to discover empirically that like charges repel and unlike charges attract. However, the explanation as to why a charged object can exert an attractive force on an uncharged object relies on knowledge of polarisation and that is probably best taught by teacher exposition. 2.2.3 Research the uses and the dangers of electrostatic charge generated in everyday contexts and the precautions that can be taken to ensure that electrostatic charge is discharged safely, and be able to describe their findings. Teacher exposition. Teachers demonstrate the high voltages generated in electrostatics with a (hand wound) Van de Graaf generator, the precautions needed when in use and how it is safely discharged. Pupils use web-based resources to investigate other situations where electrostatic accumulations are potentially dangerous (in holds of oil-tankers, in flour mills, in refuelling aircraft) and the steps taken to reduce the risk of electrostatic discharge (e.g. by earthing or the use of radioactive sources). Pupils report their findings to their peers. 43 Van de Graaf generator, discharging tongs. Textbooks C2K Computers Normal safety precautions required when using mains powered and EHT equipment such as a Van de Graaff generator. CCEA Exemplar Scheme of Work: GCSE Double Award Physics Specification Content Charge Flow Learning Outcomes Teaching and Learning Activities Resources In the context of how science works, students should be able to: 2.2.4 Understand the difference between conductors and insulators in terms of free electrons, that an electric current in a metal is a flow of electrons, and that the electrons move in the opposite direction to that of a conventional current; Teacher exposition. Pupils use textbooks and/or web-based resources to discover that metallic electrical conductors have free electrons, while insulators do not. They go on to find out that an electric current is caused by a drift of these free electrons from the negative terminal of a battery to the positive terminal, which is in the opposite direction to that of a conventional current. 2.2.5 Recall and use the quantitative relationship between current, charge and time: current =charge/ time and recall that charge is measured in coulombs. Teacher exposition. Pupils need to learn the units for current and charge and be able to apply the equation I = Q/t in all its forms. They should be given the opportunity to gain practice doing questions from worksheets. 44 Textbooks C2K Computers Safety/Risk Assessment Normal safety precautions required when using mains powered equipment. CCEA Exemplar Scheme of Work: GCSE Double Award Physics Specification Content Electric Circuits Learning Outcomes Teaching and Learning Activities Resources In the context of how science works, students should be able to: 2.2.6 Understand the role of conductors, Teacher exposition insulators and switches in simple Computer Simulation, such as provided on series and parallel circuits; the Learning NI website, gives information on conductors, insulators and switches in simple series and parallel circuits. 2.2.7 Interpret and draw circuit diagrams Teacher exposition Commercially using the standard symbols Pupils might learn to distinguish the various produced illustrated below symbols using ‘Circuit Symbol Dominoes’ CDs such as Electricity Explained The dominoes can be printed, laminated, published by cut as cards and used in the normal way to Furry Elephant are teach the meaning of symbols, or as a excellent. circuit construction game. For a free sample visit: www.furryelephant.c om 2.2.8 Recall the meaning of cell polarity and relate it to the symbol for a cell; Teacher exposition Pupils may recall this material from KS3. 45 Textbooks C2K Computers Information about Circuit Symbol Dominoes can be obtained from CLEAPSS. Visit http://www.cleapss. org.uk Safety/Risk Assessment Normal safety precautions required when using mains powered equipment. CCEA Exemplar Scheme of Work: GCSE Double Award Physics Specification Content Resistance, Voltage & Current Learning Outcomes Teaching and Learning Activities Resources In the context of how science works, students should be able to: 2.2.9 Understand that the voltage provided by cells connected in series is the sum of the voltages of each cell, having regard to their polarity; Pupils connect dry cells in series on a circuit board, measure the PD across different combinations using a voltmeter and tabulate their results. Dry cells, connecting wires with 4 mm plugs, circuit boards, voltmeters. 2.2.10 Describe and carry out an experiment to obtain the currentvoltage characteristic (I– V graph)for a metal wire at constant temperature, using mathematical modelling, derive the relationship between voltage, current and resistance; recall that this is commonly known as Ohm’s Law, and recall and use the equation, voltage = current × resistance where voltage is measured in volts, current in amperes and resistance in ohms; Pupils carry out the traditional Ohm’s Law investigation on a length of resistance wire, measuring the voltage across the wire and the current through the wire using a voltmeter and an ammeter respectively. Pupils plot the graph of current (vertical axis) against voltage (horizontal axis) and observe that it is a straight line through the origin. Pupils conclude that the current through a metal wire at a constant temperature is directly proportional to the voltage across it. Power supply Units (0-12 V), OR fixed voltage electrical supplies and rheostats, connecting wires with 4 mm plugs, crocodile clips, ammeters, voltmeters, 32 SWG nichrome wire cut into 50 mm lengths. Pupils use web-based resources to find and record a formal statement of Ohm’s Law and the equation V = IR, the mathematical definition of electrical resistance. Textbooks C2K computers 46 Safety/Risk Assessment Normal safety precautions required when using mains powered equipment. CCEA Exemplar Scheme of Work: GCSE Double Award Physics Specification Content 2.2.11 Learning Outcomes Teaching and Learning Activities Resources Pupils carry out an investigation on a filament lamp, measuring the voltage across the lamp and the current through the lamp using a voltmeter and an ammeter respectively. Pupils plot the graph of current (vertical axis) against voltage (horizontal axis) and observe that it is a curve of decreasing gradient through the origin. Power supply Units (0-12 V), OR fixed voltage electrical supplies and rheostats, connecting wires with 4 mm plugs, crocodile clips, millimeters, 3 V filament lamps secured in MES batten holders. In the context of how science works, students should be able to: Describe and carry out an experiment to obtain the currentvoltage characteristic (I–V) graph for a filament lamp, recalling that the resistance of a filament lamp increases as the current through the filament increases; Pupils conclude that the resistance of the lamp’s filament increases as the current through the filament increases. 47 Safety/Risk Assessment Normal safety precautions required when using mains powered equipment. CCEA Exemplar Scheme of Work: GCSE Double Award Physics Specification Content 2.2.12 Learning Outcomes Resources Pupils arrange a small electric motor, a fixed resistor and a filament lamp in series across a 6 V PSU. With an ammeter they measure the current in entering and leaving each component and discover it is the same in each. With a voltmeter, pupils measure the PD across each component and discover that the sum of these voltages is equal to the voltage across the PSU. Power supply Units (6 V), connecting wires with 4 mm plugs, crocodile clips, ammeters, voltmeters, 3V filament lamps secured in MES batten holders, fixed resistors (nominal 10 ohm), small electric motors. Normal safety precautions required when using mains powered equipment. Pupils arrange a small electric motor, a fixed resistor and a filament lamp in parallel across a 6 V PSU. With a voltmeter they measure the PD across each component and discover it is the same as that across the PSU. With an ammeter they measure the current in each component and discover the total current taken from the supply is the sum of the currents through the separate components. Power supply Units (6 V), connecting wires with 4 mm plugs, crocodile clips, ammeters, voltmeters, 3 V filament lamps secured in MES batten holders, fixed resistors (nominal 10 ohm), small electric motors. Normal safety precautions required when using mains powered equipment. The experimental work for 2.9.3 and 2.9.4 can also be simulated rapidly using the software package ‘Crocodile Physics’. ‘Crocodile Physics’ software package. In the context of how science works, students should be able to: Recall that for components connected in series: • • 2.2.13 Teaching and Learning Activities the current through each component is the same; and the voltage of the supply is equal to the sum of the voltages across the separate components; Recall that for components connected in parallel: • • the voltage across each component is the same as that of the supply; and the total current taken from the supply is the sum of the currents through the separate components; 48 Safety/Risk Assessment CCEA Exemplar Scheme of Work: GCSE Double Award Physics Specification Content 2.2.14 2.2.15 2.2.16 Learning Outcomes Teaching and Learning Activities Resources In the context of how science works, students should be able to: Calculate the total resistance of resistors in series; Teacher exposition. Pupils use textbooks and/or web-based resources to discover that the total resistance RT of components with resistance R1, R2 and R3 etc in series is given by: RT(series) = R1+ R2 + R3 + … Ohmmeter Calculate the resistance of two equal resistors in parallel; Teacher exposition. Pupils use ohmmeter and/or web-based resources to discover that the total resistance RT of two components, each with the same resistance R, arranged in parallel is given by: RT(parallel) = R / 2 Ohmmeter Calculate the combined resistance of any number of resistors in parallel; Teacher exposition. Pupils use ohmmeter and/or web-based resources to discover that the total resistance RT of components, with resistance R1, R2 and R3 etc in parallel is given by: 1/RT = 1/ R1 + 1/ R2 +1/ R3 + …. Ohmmeter Pupils should be given the opportunity to practice using the equations on 2.2.15 – 2.2.17 inclusive using questions from worksheets. 49 Textbooks C2K Computers Textbooks C2K Computers Textbooks C2K Computers Safety/Risk Assessment Normal safety precautions required when using mains powered equipment. Normal safety precautions required when using mains powered equipment. Normal safety precautions required when using mains powered equipment. CCEA Exemplar Scheme of Work: GCSE Double Award Physics Specification Content 2.2.17 2.2.18 Learning Outcomes Teaching and Learning Activities Resources In the context of how science works, students should be able to: Safety/Risk Assessment Calculate the combined resistance of circuits with series and parallel sections; Teacher exposition. Pupils should be given the opportunity to practice using the equations on 2.9.6- 2.9.8 inclusive on hybrid circuits using questions from textbooks and/or worksheets. Pupils can assess their progress by modelling the problem using the software package “Crocodile Physics”. Commercially produced software. Normal safety precautions required when using mains powered equipment Investigate experimentally how the resistance of a metallic conductor at constant temperature depends on length, area of cross section Pupils use bare different types of resistance wire (such as constantan, nichrome, copper, iron) of various SWG to investigate how the resistance of a conductor depends on length, cross-section area and material. Normal safety precautions required when using mains powered equipment solve simple problems. length and (ii) 1/CSA and infer that resistance is directly proportional to length and inversely proportional to cross section area. Resistance wire, power supply units (0-12 V), OR fixed voltage electrical supplies and rheostats, connecting wires with 4 mm plugs, crocodile clips, millimetres, voltmeters, metre sticks, micrometers. and the material it is made from (a knowledge of resistivity is not required) and use the findings to Pupils plot graphs of resistance against (i) 50 CCEA Exemplar Scheme of Work: GCSE Double Award Physics Specification Content Energy and Power 2.2.19 2.2.20 Learning Outcomes Teaching and Learning Activities Resources In the context of how science works, students should be able to: Understand why an electrical current flowing through a metal wire generates heat in terms of free electron–atom collisions; Teacher exposition. Pupils use web-based resources to discover that an electrical current flowing in a metal conductor generates heat as a consequence of the inelastic collisions between drifting electrons and lattice atoms. Pupils view commercially produced products such as Electricity Explained (www.furryelephant.com/) published by Furry Elephant to see a simulation of the effect. Recall and use the quantitative relationships, energy = power × time and power = current × potential difference to calculate power, current and voltage; Teacher exposition. Pupils will be familiar with energy = power × time from their work in Unit 1 (see 1.2.8) and might be introduced to power = current × potential difference through the definition of the volt. Pupils gain practice applying these equations for power using examples taken from textbooks and worksheets. 51 Commercially produced software. C2K Computers Safety/Risk Assessment Normal safety precautions required when using mains powered equipment. CCEA Exemplar Scheme of Work: GCSE Double Award Physics Specification Content Electricity in the Home 2.2.21 2.2.22 Learning Outcomes Teaching and Learning Activities Resources In the context of how science works, students should be able to: Recall that the unit used in the cost of electricity to the consumer is the kilowatt-hour, and understand the meaning of the kilowatt-hour and use of the power rating of electrical appliances to calculate their cost; Teacher exposition. Pupils use the equation developed in 2.10.2 to find the energy used by a 1kW fire in 1 hour to discover that the joule is too small for commercial use. Understand one-way and two-way switching; Teacher exposition. Pupils use textbooks and web-based resources to learn the wiring diagram for one-way and two-way switching systems. Pupils learn and understand the safety reasons why such switching must be placed on the live side of the supply. Two way switching can be investigated using two DPST switches and the construction of a truth table, or simulated using the software package ‘Crocodile Physics’. Safety/Risk Assessment Textbooks C2K Computers Normal safety precautions required when using mains powered equipment. Commercially produced software. Normal safety precautions required when using mains powered equipment. Pupils use textbooks and web-based resources to discover a definition for the kWh and the equations: Energy/kWh = power/kW x time/h Pupils use the current price of electrical energy to calculate the cost of using domestic appliances given their power rating and the time. 52 Textbooks C2K Computers CCEA Exemplar Scheme of Work: GCSE Double Award Physics Specification Content 2.2.23 Learning Outcomes Teaching and Learning Activities Resources In the context of how science works, students should be able to: Recall the wiring inside a fused three-pin plug and understand the function of the live, neutral and earth wires; Pupils use a textbook and/or teacherprepared PowerPoint slide to see the wiring inside a fused three-pin plug. Pupils use 3 core cable, wire strippers and a screwdriver to wire up a fused three-pin plug. Pupils make a coloured, labelled drawing showing how the wires are connected in a fused three pin plug. 53 Fused 3-pin plugs, 3-core cable, wire strippers, screwdrivers. Textbooks C2K Computers Safety/Risk Assessment Normal safety precautions required when using mains powered equipment. Pupils need to be warned of the dangers associated with a slipping screwdriver causing a stab wound and take the usual precautions. CCEA Exemplar Scheme of Work: GCSE Double Award Physics Specification Content 2.2.24 2.2.25 Learning Outcomes Teaching and Learning Activities In the context of how science works, students should be able to: Recall that appliances with metal cases are usually earthed and understand how the earth wire and fuse together protect the user from electric shock and the apparatus from potential damage; Teacher exposition Informed by their use of the internet, pupils research the combined use of earth wires and fuses in electrical safety and then make a PowerPoint presentation. Select the appropriate rating of a fuse, given details of power and voltage; Pupils examine small mains powered household apparatus to see different forms of protection and prepare a report on their findings. Recall the equation Pupils are taught to use the power equation in 2.2.21 to calculate the current normally flowing in a mains-powered circuit given the power of the appliance and the applied PD. Pupils then select the most suitable fuse rating as the one nearest to, but greater than, the normal current. P/V = I And use this in calculations to select the appropriate rating of a fuse. 54 Resources Safety/Risk Assessment CCEA Exemplar Scheme of Work: GCSE Double Award Physics Specification Content 2.2.26 Learning Outcomes Teaching and Learning Activities Resources In the context of how science works, students should be able to: Understand how double insulation protects the user. Pupils use textbooks and/or web-based resources to learn that double insulation is used where the appliance has a nonconducting frame (and hence no earth wire) and involves placing all conducting components which could become live and therefore dangerous within a nonconducting (plastic) box. 55 Textbooks C2K Computers Safety/Risk Assessment Normal safety precautions required when using mains powered equipment. CCEA Exemplar Scheme of Work: GCSE Double Award Physics Specification Content Generation & Transmission of Electricity 2.2.27 2.2.28 Learning Outcomes Teaching and Learning Activities Resources Describe the difference between a.c. and d.c. and identify sources for each, and recognise the waveforms of a.c. and d.c. supplies from diagrams of cathode ray oscilloscope (CRO) traces; Teacher demonstration. A CRO is used to demonstrate the waveform for a DC in one direction and then in the reverse direction. The CRO is then used to show the waveform of an AC of very low frequency. The frequency of the AC supply is slowly increased until pupils see the traditional form. By comparing DC and AC waveforms pupils infer that the polarity of the ac supply is changing regularly. Dry cells of 1.5 V (such as D-cells by EverReady), CRO, signal generator (such as supplied by UNILAB and Griffin) of variable frequency. Normal safety precautions required when using mains powered equipment. Investigate electromagnetic induction and understand that a current may be induced in a conductor by its motion relative to a magnet or by changing the current in a neighbouring conductor, and that these effects form the basis of a.c. generators and transformers; Teacher demonstrations. Induction is introduced by pulling a copper rod between the poles of a powerful magnet so as to cut the field lines at right angles. The other ends of the rod are connected to a centre-zero microammeter (or EDSPOT mirror galvanometer). Pupils see the needle kick in opposite directions when the direction of motion is reversed and that no current is induced when the rod is at rest or moving in such a way that field lines are not being cut. Copper rod, connecting wire, crocodile clips, Cshaped magnet (such as the Eclipse Major), centre-zero microammeter (or EDSPOT mirror galvanometer). If using an EDSPOT mirror galvanometer, normal safety precautions for mains powered equipment apply. In the context of how science works, students should be able to: 56 Safety/Risk Assessment CCEA Exemplar Scheme of Work: GCSE Double Award Physics Specification Content 2.2.29 2.2.30 Learning Outcomes Teaching and Learning Activities Resources In the context of how science works, students should be able to: Recall that a.c. generators are used in the generation of electricity and in their simplest form consist of a coil of wire rotated between the poles of a magnet; Pupils use textbooks to see diagrams of ac generators describe briefly and in simple terms how they work. Pupils view webbased resources to see simulations of ac generators (see also 2.3.33). Describe the construction of a step-up and a step-down transformer, including the primary coil, secondary coil and core, and Teacher exposition. The topic can be introduced via Faraday’s Iron Ring Experiment. To do this mount two UNILAB coils on clipped C-cores, connect one coil (the primary) to a 3 V battery and switch and the other to a centre-zero millimeter. Observe the needle on the ammeter kick when the switch is opened or closed. state and use the turns-ratio equation Ns/Np = Vs/Vp; Normal safety precautions required when using mains powered equipment. Clipped C-cores, coils, 3 V batteries, switches, centrezero millimeter, connecting wires terminated with 4mm plugs. Pupils make notes on the Iron Ring Experiments. Now replace the battery and switch with a low-voltage AC supply of low frequency (say 10 Hz) and the millimetre with a CRO. Observe the trace on the CRO shows an AC trace at 10 Hz. Observe that the output frequency increases as the frequency of the input increases. This is a simple transformer. 57 Safety/Risk Assessment Clipped C-core, coils, switches, CRO, connecting wires terminated with 4mm plugs, oscillator. Normal safety precautions required when using mains powered equipment. CCEA Exemplar Scheme of Work: GCSE Double Award Physics Specification Content 2.2.30 (cont.) Learning Outcomes Teaching and Learning Activities In the context of how science works, students should be able to: Finally change the coils on the cores so as to obtain different turns-ratios, attach AC voltmeters across the coils and demonstrate the turns-ratio is the same as the respective voltage ratio. Pupils practise the use of the turns ratio equation to solve problems taken from textbooks and/or worksheets. Pupils make notes on the construction of a transformer and how it works. Teacher Demonstration Using two transformers the transmission of electrical power from power station to consumer can be demonstrated. Details of the experimental demonstration can be found in Fields Waves & Atoms by Tom Duncan Chapter 16 - Electromagnetic Induction. Pupils use web-based resources to view a simulation of a transformer such as found at: http://learningni.net/Library/Curriculum.a spx Select KS4 >> Physics and search for AC generator. Then select Power Stations and/or Electromagnetic Induction. Pupils practise the use of the turns ratio equation to solve problems taken from textbooks and/or worksheets. 58 Resources Clipped C-cores, coils with different numbers of turns, switches, CRO, connecting wires terminated with 4mm plugs, oscillator. Step-up and stepdown transformers, bell wire, MES lamps suitably mounted, 3 V AC supply, connecting wires, crocodile clips. Safety/Risk Assessment Normal safety precautions required when using mains powered equipment. CCEA Exemplar Scheme of Work: GCSE Double Award Physics Specification Content 2.2.31 Learning Outcomes Teaching and Learning Activities Resources In the context of how science works, students should be able to: Describe and explain the role of step-up and step-down transformers in the transmission of electricity. Pupils use textbooks and/or web-based resources to investigate the role of a stepup transformers at the power station - to raise the voltage so that a given quantity of power can be delivered through transmission lines at a lower current and hence with less heat loss in the cables. Pupils also investigate the role of a stepdown transformer near the consumer to make the supply safer. Pupils use web-based resources to view a transmission system such as can be found at: http://learningni.net/Library/Curriculum.a spx (Interactive Whiteboard Package) 59 Textbooks C2K Computers Safety/Risk Assessment Normal safety precautions required when using mains powered equipment. CCEA Exemplar Scheme of Work: GCSE Double Award Physics Specification Content Solar System Learning Outcomes Teaching and Learning Activities Resources In the context of how science works, students should be able to: 2.3.1 Describe and explain the nebular model for the formation of the Solar System and recall evidence in support of the model; Teacher exposition Textbooks Pupils use textbook and/or web-based C2K Computers resources to find the principal points relating to the nebular (gas cloud) model for the formation of the Solar System and illustrate their findings with diagrams. 2.3.2 Describe the main features of the Solar System, including the Sun, the rocky and gas planets, moons, asteroids and comets, relating Teacher exposition to explain what is meant Textbooks by planets, moons, asteroids and comets C2K Computers and describe their origin. 2.3.3 these features to the origin of the Solar System; Pupils use internet to relate the principal features of the Solar System with the nebular model and explain why the four inner planets are rocky while the four outer planets are gas giants. Recall the order of the eight planets from the Sun outwards; Pupils devise a mnemonic to remember the names of the planets from the Sun outwards (such as: my very easy method just states unfamiliar news). 60 Safety/Risk Assessment Normal safety precautions required when using mains powered equipment. Normal safety precautions required when using mains powered equipment. CCEA Exemplar Scheme of Work: GCSE Double Award Physics Specification Content 2.3.4 2.3.5 Learning Outcomes Teaching and Learning Activities Resources In the context of how science works, students should be able to: Recall that gravity provides the centripetal force for the orbital motion of planets, comets, moons and artificial satellites; Teacher exposition Pupils use textbooks and/or web-based resources to discover that all objects in the Solar System orbit the sun and that the gravitational field of the sun provides the centripetal force. Recall, evaluate and discuss the historical evidence for the heliocentric Solar System as opposed to the geocentric, and be aware how acceptance or rejection of each of the two ideas depended on the social and historical context in which it was developed and proposed; Teacher exposition Textbooks Pupils use textbooks and/or web-based C2K computers resources to explore what is meant by the Ptolemaic (geocentric) model of the Solar System. They understand why that model was generally accepted until the 16th century and how the development of the telescope and Scientific Method provided inexplicable observations. They research how the work of Brahe, Galileo and Newton finally displaced the geocentric theory and established the heliocentric model. They look at the agents resisting change, particularly that of the Roman Catholic church. Pupils reinact an imaginary conversation between, • Ptolemy and Copernicus and • Galileo and Pope Urban VIII In relation to heliocentric versus geocentric controversy. 61 See also Circular Motion in Unit P1. Safety/Risk Assessment Normal safety precautions required when using mains powered equipment. CCEA Exemplar Scheme of Work: GCSE Double Award Physics Specification Content 2.3.6 Learning Outcomes Teaching and Learning Activities Resources In the context of how science works, students should be able to: Safety/Risk Assessment Recall the use of artificial satellites, limited to observation of the Earth, weather monitoring, astronomy and communications; Teacher exposition. Textbooks Pupils use textbooks and/or web-based C2K Computers resources to find out the differences between artificial and natural satellites. They explore the difference between polar and equatorial orbits and tabulate the applications of both. Normal safety precautions required when using mains powered equipment. 2.3.7 Know that studies of the light from stars, including our Sun, show that they are composed mainly of hydrogen and helium and that their energy is supplied by the fusion of hydrogen into helium, and describe how stars are formed (knowledge of the lifecycle of stars is not required); and Teacher exposition. Pupils use textbooks and/or web-based resources to explore star processes. Pupils view the website: http://learningni.net/Library/Curriculum.a spx enter the topic “Stars” and select from the menu to observe interactive whiteboard (or computer terminal) simulations of nuclear fusion, red shift and star formation. Normal safety precautions required when using mains powered equipment. 2.3.8 Recall and understand that the stability of stars depends on the balance between gravitational force and gas/radiation pressure; Teacher exposition. Pupil’s use textbooks and/or use web-based resources to find out what is meant by radiation pressure. Pupils appeal to the idea that the size of the solar disc in the sky has remained the same because of the balance between the outward radiation pressure and the inward gravitational force. Pupils sketch a diagram and write a paragraph to illustrate these ideas. Stars 62 CCEA Exemplar Scheme of Work: GCSE Double Award Physics Specification Content The Universe 2.3.9 Learning Outcomes Teaching and Learning Activities Resources In the context of how science works, students should be able to: Recall that the Universe began as a Big Bang which, according to current measurements, occurred 12–15 billion years ago; Teacher exposition. Pupils use textbooks and/or web-based resources to explore how the universe began. Pupils view the website: http://learningni.net/Library/Curriculum.a spx Enter the topic “Stars” and select from the menu to observe interactive whiteboard (or computer terminal) simulations of the Big Bang. An outline of the model and the evidence for it can be found from LearningNI.net. For an outline students might use textbooks or web-based resources or visit the Home Page of LearningNI.net on C2K computers. Select Library>KS4>Physics>Stars and download the PowerPoint package for Textbooks presentation to pupils on an Interactive C2K Computers Whiteboard. 63 Safety/Risk Assessment Normal safety precautions required when using mains powered equipment. CCEA Exemplar Scheme of Work: GCSE Double Award Physics Specification Content 2.3.10 Learning Outcomes Teaching and Learning Activities Resources Teacher exposition. After a brief introduction, students might view the recording ‘Big Bang’ first broadcast by Channel 4 in October 1999 in the Science in Focus series. This video lasts about 20 minutes, covers most of the material required for 2.3.12 and consolidates earlier work. Channel 4 Video broadcast in October 1999 in the Science in Focus series. Normal safety precautions required when using mains powered equipment. Channel 4 also broadcast in October 1999 another programme ‘Big Bang – the universe’ lasting about 10 minutes and featuring the Astronomer Royal and going into the detail of Penzias and Wilson’s discovery of the cosmic microwave background radiation. Both videos were available at one time from ELBs. After viewing these programmes in small chunks, students should be capable of making summary notes at the level required by the specification. Channel 4 Video broadcast in October 1999 in the Science in Focus series. Normal safety precautions required when using mains powered equipment. In the context of how science works, students should be able to: Recall that evidence for the Big Bang includes that light from other galaxies is shifted to the red end of the spectrum, and that this can be explained by space expanding; 64 Safety/Risk Assessment CCEA Exemplar Scheme of Work: GCSE Double Award Physics Specification Content Structure of the Earth Learning Outcomes Teaching and Learning Activities In the context of how science works, students should be able to: 2.3.11 Recall that the Earth is divided into Teacher exposition. layers based on mechanical Pupils research using textbooks and/or properties and composition; web-based resources the structure of the Earth. 2.3.12 Recall that the topmost layer is the lithosphere, which is comprised of the crust and the solid portion of the upper mantle; Pupils view the website: http://learningni.net/Library/Curriculum.a spx Enter the topic ‘Structure of Earth’. They select from the menu to observe the “onion” model with crust and mantle (lithosphere), outer core and inner core. Pupils sketch and label a diagram to show the structure. 2.3.13 Explain the cause of earthquakes and volcanoes Pupils use textbooks and/or web-based resources to explore the Wegener model of plate tectonics and the evidence for movement of continental and oceanic plates from earthquakes, volcanoes, subduction and magnetic anomalies at mid-ocean ridges. Pupils learn that earthquakes are caused mainly by the relative movement of tectonic plates. Magma sometimes rises under enormous earths towards the crust. A volcano erupts when magma reaches the earth’s surface it is called lava. Pupils represent these phenomena in a series of labelled, illustrated diagrams. 65 Resources Safety/Risk Assessment Normal safety precautions required when using mains powered equipment. Normal safety precautions required when using mains powered equipment. CCEA Exemplar Scheme of Work: GCSE Double Award Physics Double Award Science (Physics) Candidates are not given a formula sheet in the examinations for this subject. However, listed below are formulae which centres might find useful to give to pupils. The list is not exhaustive, but it does seek to bring together the main formulae which candidates are likely to use during the course. Formula Sheet Average speed = total distance / total time s = d/t Avg. speed (uniform acceleration) = ½ (initial speed + final speed) av speed = ½(v+u) Average velocity = total displacement / total time v = d/t Acceleration = change in velocity/time a = (v-u)/t Force = mass x acceleration F = ma Weight = mass x acceleration due to gravity W = mg Density = mass / volume D = M/V momentum = mass x velocity p = mv Work = force x distance W.D = Fd Efficiency = useful energy out / total energy in Eff = UEO/TEI Power = work done/time taken P = W/t Power = energy transferred / time taken P = E/t Kinetic Energy K.E = ½ mv2 Gravitational Potential Energy G.P.E = mgh Moment = force x perpendicular distance Moment = fd Principle of Moments ACWM = CWM wave speed = frequency x wavelength v = fλ current = charge / time I = Q/t voltage = current x resistance V = IR Resistors in series Rseries = R1 + R2 + R3 + … Resistors in parallel 1/Rparallel = 1/R1 + 1/R2 + 1/R3 + Power = current x potential difference P = VI Transformer turns ratio equation Ns/Np = Vs/Vp 66 CCEA Exemplar Scheme of Work: GCSE Double Award Physics GCSE Double Award Science (Physics) Resources Textbooks: GCSE Physics for CCEA by McCauley & White published by Hodder GCSE Physics for CCEA Revision Book by White published by Hodder AQA GCSE Science published by Longman Twenty First Century Science: GCSE Physics Textbook published by Oxford GCSE Physics Revision Guide by Richard Parsons published by CGP Software: Learning N.I. (part of C2K implementation). To reach the HOME page visit: http://learningni.net/Home/Home.aspx Crocodile Physics (part of C2K implementation and published by Crocodile Clips.com) For further information visit: http://www.crocodile-clips.com Furry Elephant Software For simulation software relating to electricity (Electricity Explained) and radioactivity (Radioactivity Explained) visit: http://www.furryelephant.com/ Boardworks For information on Interactive Whiteboard (and other) presentations visit: http://www.boardworks.co.uk/gcse-additional-science_80/ Revision: Revision and consolidation materials can be downloaded free from: http://www.bbc.co.uk/schools/gcsebitesize/science/ http://www.s-cool.co.uk/gcse/physics.html Miscellaneous: Miscellaneous resources (some free to download, some for purchase) on various topics and in various media are available from Nuclear Decommissioning Authority, Sellafield. and Free Teaching Resources which provides a portal to BP Educational Service, E.ON etc Up-to-date safety information and other resources can be obtained from CLEAPPS. For more information visit: http://www.succeedingwithscience.com/resources/downloadsecondary.php http://www.free-teaching-resources.co.uk/bpes.shtml http://www.cleapss.org.uk 67