ELEM 631 Dr. Linda Pickett Winthrop University “Keep away from people who try to belittle your ambitions. Small people always do that, but the really great make you feel that you, too, can become great.” - Mark Twain Agenda Revised rubrics for presentation and narrative FOSS Magnetism and Electricity Kit – Magnetism – Electricity – Electromagnetism Assessment ideas for Elementary Science FOSS Program Any prior experiences? Coordinated science curriculum from the Lawrence Hall of Science – University of California, Berkeley Research-based Classroom-tested Based on brain research and children’s developmental stages – look at Thinking Processes on chart on page 152 Instructional Pedagogies Inquiry Hands-on Active Learning Multisensory Methods Student-to-Student Interactions – Grades 3-6 - groups of 4 and share materials – Grades K-2 – work in groups but have own materials “Working alone...together” Discourse and Reflective Thinking Assessing Student Learning Content Knowledge Conducting Investigations Building Explanations Assessment Strategies: – Observations and interviews – Scoring guides and recording strategies – Short summative test and system for portfolio assessment Quick Write Engage Please write three things you know about magnetism. What experiences you have had with magnetism? Neodymium Magnets Engage NIB magnet (also called a rare earth magnet) is a powerful magnet made of a combination of neodymium, iron, and boron Used for stabilization and angular head motors in computer hard drives A neodymium magnet lifting 1300 times its own mass How much could you lift if you were a neodymium magnet? Magnetic Observations Exploration Staying seated, use your magnet to explore. – What are some of the things it sticks to? Put magnets aside Sort test objects into 2 groups: – things that will stick to a magnet – things that will not stick to a magnet Test to confirm predictions Page 169 Exploration Page 169 Test objects in classroom – do not put magnets near computers, screens, credit cards, CDs, jump drives. What happens when two magnets come together? Can you make a temporary magnet out of a nail? Explanation What do magnets stick to? – Objects made of iron or steel Why does it stick to the rock? – Lodestone – contains the mineral magnetite which is rich in iron Attract and Repel – Put 4 magnets on a pencil and make them “float” Breaking the Force Elaboration and Extension Materials 1 magnet-on-a-post 1 magnet 1 balance 2 plastic cups 1 bag of washers 6 spacers Paper to record data Breaking the Force Investigation 1. 2. 3. 4. Put the magnet on a post in the hole on the bottom of the balance. Put the cups in the holes. Put the doughnut magnet in the cup above the magnet on a post. Stack washers in the other cup until you break the force between the two magnets. Data Table Please enter the # of washers that “broke the force” Number of spacers Initials 0 1 SS 17 10 BM 19 11 JE 16 10 2 3 4 5 6 Do Not 6 5 4 4 5 5 4 3 6 5 4 4 Test Yet Graph the Data – Page 171 Use the recording sheet: The Force Independent variable? Where does it go? # of spacers – X axis Dependent variable? Where does it go? # of washers – Y axis Plot the data points Do not connect points with straight edge Interpolate - Hypothesize # of washers for 2 spacers Test to confirm your hypothesis Share a graph What do the graphs mean? The points represent the relationship between: – The distance between the two magnets (# of spacers) and – The force of the magnetic attraction between the two magnets (# of washers needed to “break the force”). Curved (sloped) graph – is a non-linear graph that indicates the relationship between the two variables. It means the relationship between the two variables is not constant. Extrapolate – predict for more than 6 spacers Use graphs to draw conclusions Explanation Washers are used to quantify the force of the magnetic attraction between two magnets. The greater the distance between two magnets, the weaker the force of the magnetic attraction between them. Word Bank Explanation Force – A push or pull Magnet – An object that sticks to iron Magnetism – A specific kind of force Attract – When magnets pull together Repel – When magnets push apart Word Bank Explanation Temporary magnet – A piece of iron or steel that behaves like a magnet when it is touching a permanent magnet Permanent magnet – Permanent magnetic fields have been induced and will remain unless the magnet is dropped or heated. – Used to be made of iron, but now aluminum, nickel, cobalt, ferrite, neodymium are used to make powerful, long-lasting magnets. Making Connections Lighting a Bulb Materials: 2 light bulbs, 2 D-Cells, 2 short wires, 1 circuit base Use a D-Cell and two wires (no light bulb holder) to light the bulb. Trace the path of electricity. Now light the bulb using only one wire. Again, trace the path of electricity. Pages 172-173 Circuit - A pathway for the flow of electricity – by convention we say it goes from negative to positive The electricity must travel in a complete path (circle) from one end of the battery, through the parts of the circuit and back into the battery. Filament - The part in a light bulb that gets hot and produces light Look at Response Sheet – Bulbs (page 174) – Do you think the bulb will light? Hands-on Circuit Activity Put the light bulb in the holder and put the battery in the battery holder on the circuit base. Push down on the Fahnstock clips to insert the wires. Light the bulb. Making a Motor Run Pick up a motor Build a circuit , using 1 D-cell, that will make the motor run. Get a switch. Wire in the switch so you can turn the motor on and off. What does the switch do? Opens and closes the circuit. Build a circuit that will light 1 light bulb and can be turned on and off with a switch. Finding Conductors and Insulators – p. 175 Pick up 2 long wires and a bag of test objects Sort test objects into two groups: Conductors – conduct electricity Insulators – do not conduct electricity Set up testing circuits and confirm hypotheses Concepts All metals are conductors. Metals that are covered with an insulating layer will not conduct electricity. Building Series Circuits Turn in motors and 2 long wires Pick up 2nd light bulb in holder, 1 additional short wire, and 1 switch Build circuit that will light two bulbs with one battery Why are the light bulbs dim? Use 2nd battery in holder to make two light bulbs burn brightly. – Use wire to connect the two batteries – How do batteries have to be positioned? Series circuit - a circuit with only one pathway for current flow Students do Page 176 as an assessment Building Parallel Circuits You will need 2 long wires and 4 short wires Use 1 battery to get 2 light bulbs burn brightly. Students use page 177 to record their solutions. Try some of the different solutions shown on Elmo. Parallel circuit - splits into two or more pathways before coming together at the battery Online resources Game Jeremy – iPad apps Current Attractions Part 1: Building an Electromagnet Materials: 1 rivet, 1 electromagnet wire, 1 short wire, 1 circuit base, 1 D-cell, 1 switch, 1 bag of small washers Work with your partner to make an electromagnet that will lift the washers. Word Bank Electromagnet – A coil of insulated wire, usually wound around a core of iron or steel, which produces a magnetic field when electricity flows through the wire. Core – The material around which a coil is wound Coil – Insulated wire wound repeatedly around a central core Concepts A magnet can be made by winding an insulated wire around an iron core and running current through the wire. The magnetism produced by an electromagnet can be turned on and off. Part 2: Changing Number of Winds How can you change the strength of an electromagnet? Groups of 4 Materials: 1 rivet, 1 electromagnet wire, 1 short wire, 1 circuit base, 1 D-cell, 1 switch, 1 cup of small washers Recording sheet: Winding Electromagnets – page 178 Concepts What was the general pattern you saw in the way the number of winds affects the strength of an electromagnet? The more winds on the core of an electromagnet, the stronger the magnetism. Switch to PP It is assessment that helps us distinguish between teaching and learning. Prior Knowledge and Alternative Assessment Strategies Brainstorming Discussions Think-pair-share Concept maps Drawings Venn Diagrams and written summaries Science journal/notebooks entries Design assessment strategies that are easy for your students to understand and provide different ways for them to demonstrate their learning. Try to grade work and activities done in class as much as possible Page 302 in your packet Feel free to use or modify any of these ideas when you are designing assessments for your lesson plans. Unit is due on Thursday Turn in hard copies of the three lesson plans with all required activity sheets, assessments, and attachments Please label each Lesson Plan as 1, 2, or 3 Include a rubric with each lesson plan Submit each lesson plan and all attachments to Live Text by 1:00 on Thursday – be sure to submit as correct assignments