2. 4-19-13 FRIDAY! Do Now: Do eclipse worksheet. Both sides. LT: I can describe how energy is transformed from one form to another (PS3A).

3. Types of energy Moving (kinetic) energy Light Thermal Electrical Mechanical Sound Potential energy ChemicalChemical GravitationalGravitational ElasticElastic NuclearNuclear

4. Energy Transfer

5. Efficiency An energy diagram for the bike would look like this :- 100 000 J Chemical Energy 80 000 J Kinetic 12 000 J Heat 8 000 J Sound

6. Insulation

10. What’s in The Box? Energy in: Electrical energy Energy out: Sound energy

11. What’s in The Box? Energy in: Electrical energy Energy out: Sound energy A radio converts electricity into sound

12. What’s in The Box? Energy in: Electrical energy Energy out: Heat energy

13. What’s in The Box? Energy in: Electrical energy Energy out: Heat energy A cooker converts electricity into heat KS3 stuff!

14. What’s in The Box? Energy in: Electrical energy Energy out: Light energy

15. What’s in The Box? Energy in: Electrical energy Energy out: Light energy A lamp converts electricity into light KS3 stuff!

16. What’s in The Box? Energy in: Chemical energy Energy out: Heat & Light energy

17. What’s in The Box? Energy in: Chemical energy Energy out: Heat & Light energy A match converts chemical energy into light and heat KS3 stuff!

18. What’s in The Box? Energy in:Energy out: Heat Energy Electrical energy Light Energy

19. What’s in The Box? Energy in:Energy out: Heat Energy Electrical energy Light Energy Although a lamp is meant to transfer electrical energy into light it actually transfers most of the energy into wasted heat.

20. Energy Transfer

21. Energy chains

22. Exit 1.Write the LT in your own words. 2.What was the most important thing you learned today? 3.What are still the most unsure about?

23. Sun> light energy>wheat>chemical energy>breakfast>mechanical energy>ride bike up hill>gravitational potential energy>coast downhill>kinetic energy>crash into tree>sound energy>leaves shake/windows rattle>

24. Video Matter? Everything in the Universe. Solid-liquid gas. Matter needs energy to change. Energy constantly changing Never created/destroyed Energy can be transferred Work: force working over a distance to move an object. A transfer of energy. Also needs energy! …stacking boxes. Potential changed to kinetic Potential energy: Position—spring (elastic)— Law of conservation of mass and energy—Einstein— –Ping pong/golf ball –Heat transfer. Conduction, convection, radiation

27. Efficiency In any energy change there is ALWAYS wasted energy When a zebra eats the grass, it does not obtain all of the energy the grass When a lion eats a zebra, it does not get all of the energy from the zebra Only 10% of the energy from one trophic level is transferred to the next – this is called the 10% law