2. * Materials that allow heat, electricity, or sound waves to pass through them

3. * Conductor

4. * A material used to prevent electricity or heat from passing through

5. * Insulator

6. * Electromagnetic energy

7. * Radiation

8. * energy that comes from the sun

9. * Solar Energy

10. * the transfer of heat through a fluid

11. * Convection

12. * allowing heat or electricity to pass through easily

13. * Conduction

14. * a closed path that electricity can flow through

15. * Circuit *

16. * the movement of electric charges through a material

17. * Current *

18. * a device used to measure temperature

19. * Thermometer

20. * a measure of how hot or cold a substance is

21. * Temperature

22. * A measure of how fast or slow the matter’s particles are moving

23. * Thermal Energy

24. * Thermal energy given off by an object

25. * Heat