SAMPLE SURVEY TO SOLICIT STAKEHOLDER FEEDBACK (Developed by Rick Robinett) Dear Colleague, As part of The Governor’s Commission for College and Career Success, a Science Benchmarks committee has been formed to generate a set of benchmarks in the Sciences (Physics, Chemistry, Life Sciences, etc.) which are similar in scope to ones already proposed for Mathematics and English. Students graduating from a Pennsylvania high school in these fields would be expected to have mastered the topics listed in these benchmarks. As a member of the committee who’s helped to draft the preliminary Physics benchmarks you’ll find below, we would very much appreciate your comments. We’ve included the benchmarks (in the left-hand column) where you’ll find a number of general areas, and more specific topics. Some are marked by asterisks and the use of that notation is described at the top of benchmarks (which start on the next page.) In the right-hand column, we’ve indicated a 1-5 scale and would appreciate your opinions on the relative importance of each general area and topic. Please feel free to make comments (general or specific) as well, and there is an area at the end of the benchmarks set aside for that. Thanks very much for your time in this effort. Rick Robinett rick@phys.psu.edu (814) 863-0965 303J Osmond Lab Department of Physics Penn State University University Park, PA 16802 1 PA Benchmarks: Physics (Jan. 16, 2007) Certain Physics benchmarks are marked with an asterisk (*). These asterisked benchmarks represent content that is recommended for all students, but is required for those students who plan to continue with Physics coursework at the college level and for many physics intensive STEM-related majors or careers Using the scale on the right, please indicate how important you think that the given ‘benchmark’ topic. Consider 1 as being VERY IMPORTANT and 5 being NOT VERY IMPORTANT. If you’re completing electronically, you can simply type an X over the appropriate numerical value. A. Motion and forces A1. Understand that motion can be described and analyzed conceptually and quantitatively. Important A1.1. Be able to describe the difference between scalar and vector quantities and cite examples. Important A1.2. Be able to compare and contrast the vector quantities (such as displacement, velocity, acceleration, force, linear momentum) and scalar quantities (distance, speed, energy, mass, work) that are used to describe kinematics (the science of motion). Important 1 1 1 Not important 2 Important *A1.5. Be able to analyze onedimensional motion using the description of position, velocity, and acceleration as functions of time, using algebraic descriptions for simple Important 1 1 2 4 5 Not important 2 3 4 5 Not important 2 A1.3. Demonstrate a conceptual Important understanding of a reference frame by explaining why one is needed when describing 1 2 motion, and by using reference frames to explain and represent the relative motion of two objects. A1.4. Demonstrate a conceptual understanding of average velocity, average speed and average acceleration during intervals of time by determining these quantities using tables and/or graphs of data representing position versus time and velocity versus time. 3 3 4 5 Not important 3 4 5 Not important 2 3 4 5 Not important 2 3 4 5 motions (uniform velocity or uniform acceleration). A1.6. Be able to convert between the different sets of units (MKS, English, etc.) often used in kinematics and dynamics. Important A1.7. Be able to use dimensional analysis to predict the results of simple problems and check the results of more challenging ones. Important A2. Understand that Newton's laws of motion describe and predict the motion of macroscopic objects, and be able to interpret and apply Newton’s three laws of motion. Important 1 1 1 Not important 2 Important A2.3. Be able to describe the concept of mass as inertia, i.e., as a measure of resistance to change in motion by an applied force. Important A2.4. Be able to represent forces acting on a system of objects utilizing free-body diagrams. Important *A2.5. Be able to use Newton's Laws to solve problems in static equilibrium, and situations that yield constant acceleration. Important A2.6. Be able to apply Newton’s laws to free fall and projectile motion. Important 1 1 1 1 1 A2.7. Be able to describe motion in 2-D and 3-D as the net motion due to independent Important 3 4 5 Not important 2 3 4 5 Not important 2 A2.1. Be able to add and subtract vectors Important graphically and algebraically in one or more dimensions. 1 2 A2.2. Demonstrate understanding that a net force is required to alter an object’s motion by describing how the magnitude of the object's acceleration is proportional to the magnitude of the total applied force and the direction of acceleration that of the total applied force. 3 3 4 5 Not important 3 4 5 Not important 2 3 4 5 Not important 2 3 4 5 Not important 2 3 4 5 Not important 2 3 4 5 Not important 2 3 4 5 Not important motions in a rectangular coordinate system. 1 A2.8. Demonstrate conceptual understanding of the motion of an object undergoing circular motion at constant speed by describing the acceleration it undergoes, and the forces that produce that acceleration. Important A2.9. Describe the nature of static and kinetic friction, and describe their effects on motion. Important A2.10. Describe Newton's law of universal gravitation in terms of the attraction between two objects, their masses, and the distance between them. Important *A2.11. Be able to apply principles of rotational motion to solve problems relating to angular momentum and torque. Important 1 1 1 1 4 2 3 4 5 Not important 2 3 4 5 Not important 2 3 4 5 Not important 2 3 4 5 Not important 2 3 4 5 B. Conservation of energy and momentum B1. Understand that the law of conservation of energy provides an alternate approach that can be used to predict and describe the motion of objects. Important B1.1. Be able to explain work as being due to the action of a force on an object undergoing a displacement. Important B1.2. Using appropriate examples, be able to describe how energy can be converted from gravitational potential energy to kinetic energy and vice versa. Important B1.3. Demonstrate an understanding of the law of conservation of energy in mechanical systems by using this law to solve for kinematic variables in appropriate problem situations. Important B1.4. Be able to describe both qualitatively and quantitatively how work can be expressed as a change in mechanical energy. Important B1.5. Be able to describe both qualitatively and quantitatively the concept of power as work done per unit time. Important B2. Understand that the law of conservation of momentum provides a complementary approach to law of conservation of energy to predict and describe the motion of objects. Important B2.1. Be able to describe linear momentum as the product of mass and velocity and understand the relationship between the momentum change of an object and the forces acting on it. Important B2.2. Demonstrate an understanding of the conditions under which momentum is conserved by applying momentum conservation methods in appropriate situations (e.g. those Important 1 1 1 1 1 1 1 1 1 5 Not important 2 3 4 5 Not important 2 3 4 5 Not important 2 3 4 5 Not important 2 3 4 5 Not important 2 3 4 5 Not important 2 3 4 5 Not important 2 3 4 5 Not important 2 3 4 5 Not important 2 3 4 5 involving collisions). B2.3. Demonstrate a conceptual understanding of the difference between the laws of conservation of momentum and conservation of energy by describing the conditions under which one law or the other, or both, apply. Important 1 6 Not important 2 3 4 5 C. Heat and heat transfer C1. Understand that heat is energy that is transferred between objects or regions that are at different temperatures, by the processes of convection, conduction, and radiation. Important C1.1. Explain qualitatively how heat energy is transferred by the processes of convection, conduction, and radiation. Important C1.2. Explain how heat energy will move from an object at higher temperature to one at lower temperature until equilibrium is reached. Apply these concepts to understand everyday phenomena or technological applications, such as how a thermos bottle or insulation works. Important C2. Understand the concept of energy conservation (First Law of Thermodynamics) and use it to relate various forms of energy. Important C2.1. Describe the relationship between average molecular kinetic energy and temperature. Understand that heat energy consists of the random motion and vibrations of atoms, molecules, and ions. Important 1 1 1 1 1 Not important 2 Important C2.4. Describe the various sources of energy used in society. Important 1 1 7 4 5 Not important 2 3 4 5 Not important 2 3 4 5 Not important 2 3 4 5 Not important 2 C2.2. Explain the relationships between Important the temperature change in a substance for a given amount of heat transferred, the amount (mass) of 1 2 the substance, and the specific heat. C2.3. Describe the difference between energy and power. Be able to convert between the many units used to describe both energy and power. Use such conversions to discuss the amount of energy (in various forms) contained in disparate systems. 3 3 4 5 Not important 3 4 5 Not important 2 3 4 5 Not important 2 3 4 5 *C2.5. Demonstrate a qualitative understanding of the Second Law of Thermodynamics by describing the Law and the limits it places on the efficiency of devices such as refrigerators and engines. 8 Important 1 Not important 2 3 4 5 D. Waves D1. Understand that waves carry energy from place to place without the transfer of matter. Important D1.1. Describe the properties of simple harmonic motion of an object from a basic mechanics viewpoint, and how the period, frequency, and amplitude of motion are determined by the conditions and material properties of the object. Important 1 1 Not important 2 Important D1.4. Describe the differences between transverse and longitudinal waves in mechanical systems and cite examples. Important D1.5. Recognize the effects of media on the speed of a mechanical wave by qualitatively comparing the speeds of such waves in solids, liquids, and gases. Important D1.6. Describe the differences between mechanical waves (especially sound) and electromagnetic waves, especially their propagation speeds. Important D1.7. Demonstrate an understanding of the basic interactions of waves with matter by describing reflection and refraction. Important D1.8. Explain how changes in the wavelength and frequency of waves as they pass through media affect the propagation of the waves. Important 1 1 1 1 1 1 9 4 5 Not important 2 D1.2. Describe the measurable properties Important of waves (speed, frequency, wavelength, amplitude, and period) and explain the 1 2 relationships among them. D1.3. Describe the differences between standing and traveling waves in mechanical systems and cite examples. 3 3 4 5 Not important 3 4 5 Not important 2 3 4 5 Not important 2 3 4 5 Not important 2 3 4 5 Not important 2 3 4 5 Not important 2 3 4 5 Not important 2 3 4 5 D1.9. Describe the apparent change in frequency of waves due to the motion of a source or observer (the Doppler effect) and cite examples from everyday life or use in technological applications, such as radar guns. Important D1.10. Be able to apply wave concepts to understand everyday phenomena or technological applications, such as ultrasound and sonar. Important 1 1 10 Not important 2 3 4 5 Not important 2 3 4 5 E. Electromagnetism E1. Understand that stationary and moving charged particles give rise to electrical and magnetic phenomena. Important E1.1. Be able to describe the attractive and repulsive electrostatic forces between objects in terms of their charges and the distances between them, as described by Coulomb’s law. Important E1.2. Be able to compare and contrast the forms of Newton’s law of gravity (between two masses) and Coulomb’s law (between two charges) in terms of their functional form (inverse square laws) and magnitudes. Be able to explain that gravitational forces play a more important role in macroscopic systems than electrical forces due to the overall charge neutrality of matter. Important E1.3. Demonstrate a conceptual understanding of the differences between insulators and conductors by explaining how electric charge tends to be static on insulators and can move on the surface of, and inside, conductors. Important E1.4. Be able to explain that energy can produce a separation of charges, with a subsequent change in electrostatic potential energy. Demonstrate a conceptual understanding of electric potential (voltage) as a potential energy per unit of charge. Important E1.5. Explain how electric current is a flow of charge caused by a difference in electric potential (voltage) and that power dissipation is given by the product of current and voltage. Important E1.6. Be able to describe a qualitative and quantitative understanding of current, voltage, resistance and the connection between them, as described by Ohm's law. Important 1 1 1 1 11 1 1 1 Not important 2 3 4 5 Not important 2 3 4 5 Not important 2 3 4 5 Not important 2 3 4 5 Not important 2 3 4 5 Not important 2 3 4 5 Not important 2 3 4 5 E1.7. Be able to recognize circuit symbols Important and the common circuit elements (battery, wires, resistance) in a schematic diagram. 1 2 E1.8. Be able to predict qualitatively how Important different combinations of components such as batteries, light bulbs, and switches will behave in 1 2 series and parallel configurations. *E1.9. Be able to analyze simple arrangements of electrical components, in both series and parallel configurations. Important E1.10. Apply concepts related to electricity and circuits to understand everyday phenomena or technological applications, such as batteries, household circuitry, and power grids. Important *E1.11. Recognize that moving electric charges create (and experience) magnetic forces and moving magnets produce electric forces. Recognize that the interplay of electric and magnetic forces form the basis for the operation of electric motors, generators, and other technologies. Important 1 1 12 1 Not important 3 4 5 Not important 3 4 5 Not important 2 3 4 5 Not important 2 3 4 5 Not important 2 3 4 5 F. Electromagnetic radiation F1. Understand concepts dealing with electromagnetic waves Important 1 F1.1. Recognize that electromagnetic waves are transverse waves and travel at the speed of light (in vacuum). Important F1.2. Describe the electromagnetic spectrum in terms of frequency and wavelength, and identify the location of radio waves, microwaves, infrared radiation, visible light (rainbow spectrum), ultraviolet rays, x-rays, and gamma rays. Important F1.3 Apply concepts of electromagnetic waves to understand everyday phenomena or technological applications, such as radio, microwave, and X-ray devices. Important F2. Understand the physics underlying the use of optical instruments. Important 1 1 1 1 F2.1. Using diagrams, describe the refraction and reflection of electromagnetic waves (especially light) from matter leading to real and virtual image formation from simple mirrors and lenses. Important *F2.2. Demonstrate an understanding of how refraction and reflection effects are used in the design and performance of optical instruments by solving basic geometric optics problems consisting of mirrors, microscopes, telescopes, etc.. Important 1 General Comments: 13 1 Not important 2 3 4 5 Not important 2 3 4 5 Not important 2 3 4 5 Not important 2 3 4 5 Not important 2 3 4 5 Not important 2 3 4 5 Not important 2 3 4 5