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Across 4. describes a collision that conserves momentum but not kinetic energy 8. if either mass or height are doubles, potential energy __?__ 10. measures average kinetic energy of particles in matter 12. process that changes energy from one form to another 13. energy that flows between two objects due to temperature difference 14. transfer of kinetic energy between particles of objects in contact 15. if speed doubles (same mass), kinetic energy __?__ 17. energy my change form but total energy is always __?__ 21. ability to cause change 25. SI unit of energy 26. transfer of energy through motion 27. energy form associated with vibrations of molecules (usually air) 28. potential energy in molecules of foods and fuels 29. describes a collision that conserves momentum and kinetic energy 30. energy of motion

Down 1. potential energy due to position above Earth 2. temperature scale based on freezing and boiling points of water 3. energy form associated with any form of electromagnetic radiation 5. energy form associated with moving/distorted parts of devices 6. energy needed to melt 1 g of a solid at its melting point: heat of __?__ 7. energy form associated with charged particles 9. device used to measure changes in thermal energy 11. simple device that transform potential to kinetic energy by swinging 16. stored energy (of position/condition) 18. energy needed to raise the temperature of 1 g by 1 ºC: __?__ heat 19. if mass doubles (same speed), kinetic energy __?__ 20. potential energy in stretched/bent object 22. energy form associated with temperature and heat 23. SI unit of energy 24. resisting force that transforms mechanical into thermal energy