Come Get a Charge Out of This!

Transcription

1 Come Get a Charge Out of This! John Howarth SEPUP - Lawrence Hall of Science UC Berkeley NSTA Indianapolis

2 Science and Global Issues: Physical Science National Science Foundation Curriculum Development Project Developed by SEPUP, Lawrence Hall of Science, UC Berkeley Uses sustainability as the unifying context for studying important physical science concepts Issue-oriented science... Students talk, think, and discuss science content as it relates to personal, societal, and global Issues Students learn to use evidence in the decision-making process Inquiry-based activities Embedded assessment system and literacy strategies

3 Science and Global Issues: Physical Science One introductory unit on Sustainability Two physics units Global Energy and Power Electricity and magnetism Electromagnetic and Seismic Waves Wave nature,properties,and applications Two chemistry units Earth s Resources Matter, atomic structure, bonding, periodic table Fueling Chemical reactions, stoichiometry

4 Field Test Effect Sizes Note: Small effect size > 0.2, moderate effect size > 0.5, large effect size > 0.8

5 Global Energy and Power 20 activities taking about 9 weeks Modular circuit components Laboratory activities Investigations Readings, discussions,and simulations

6 Topics covered Charge Current Voltage Power Efficiency Capacitance Resistance Resistivity Ohm s Law Kirchoff s Laws Series and parallel circuits Electric and magnetic fields Motors Generators Lorentz force Electromagnetic induction Transformers Transmission

7 Context of activities The main issue is that of sustainable energy generation and use Sub-topics include: Vampire energy Global and historical trends Alternative energy potential and reality Advantages and disadvantages of power sources Energy storage Engineering design Models and analogies

8 Sustainability Sustainability in the context of human development can be defined as: Meeting the needs of the present without compromising the ability of future generations to meet their own needs. - UN Commission on World Economic Development, 1990

9 Aspects of Sustainability Sustainability can be examined through three perspectives - environmental, economic, and social All three perspectives must be attended to adequately for a situation to be sustainable Sustainability can also be viewed at three levels - personal, community, and global

10 Activities preceding 6 and 7 In Activities 4 and 5 students have looked at renewable and non-renewable energy sources. They realize that renewable sources such as wind, solar, and water can be intermittent They now look at the idea of storage

11 Activity 6 Introduces the concept of charge and the use of schematic diagrams Uses the spinning of a motor as an indicator of the flow of charge.

12 Activity 6 The challenge: Design and conduct an experiment that allows your group to investigate the variables that affect how much charge can be stored on a capacitor.

13 Activity 7 Looks more into capacitor discharge Introduces current, ammeters, open circuits, and closed circuits Students create line graphs of data Students read about different methods of storing energy for electricity generation and transmission

14 Activity 7 Set up the charge/discharge circuits Collect, record, and graph the data

15 Activities following 6 & 7 Activity 8 uses a reading to introduce electric fields and force on a charge Activity 9 uses an electric field simulation to introduce electric potential Activity 10 is a laboratory activity where students build circuits and measure voltage in various locations

16 Student Book Guides investigations and provides related resources Different activity types, designed to focus on concept and skill development On-line student books available, too! Analysis questions call for students to apply or evaluate their knowledge

17 Teacher Guide Overview and suggested time Key content and process skills Materials and advance prep Teaching summary Background information Teaching suggestions Sample responses Literacy & Assessment

18 Ancillaries PowerPoints for every lesson Kits and supplies Exam View Simulations Video clips Web tools & more

19 For further information John Howarth at: