ACROSS

1. 1 of 3 states of matter,set volume,rigid shape;no flow,hard 2 compress.

2. Change of state from solid to liquid.

4. Form of vaporization;the fast change of state from a liquid to a gas.

6. a state of matter,fills container,takes shape,can flow,easy 2 compress.

8. Transfer of heat by waves of energy.

10. Nuclear reaction-atoms are split into smaller atoms,releasing energy.

12. Large parts of earth were covered with ice.

13. Energy transfers from particles of hot 2 cold substances.

14. Liquid or gas;state of matter,atoms are free 2 flow.

15. A substance that conducts heat well.

17. Change of state from liquid 2 gas.

19. Instrument used 2 measure temperature of substances.

22. Nuclear reaction-hydrogen atoms joined together forms helium,releases energy.

24. a state of matter,set volume,takes container's shape,flows,hard 2 compress.

25. One of the sources of heat.

27. Name for change of state from liquid 2 solid.

28. Form of vaporization;slow change of state from liquid 2 gas.

DOWN

1. Change of state from liquid 2 solid i.e.freezing.

3. Measures invisible radiant heat;used 2 make thermographs.

5. Matter=tiny particles,particles move/have energy,more energy=faster mov't.

7. Graph showing change of state of a substance.

9. Creates pictures of heat;i.e. police surveillance.

11. Change of state from solid directly 2 gas.

15. The change from a gas to liquid.

16. Transfer of heat by mov't of particles from 1 part of a fluid 2 another.

18. (J)Unit used 2 measure all forms of energy,including heat.

20. Energy transferred as waves,by radiation;ie. sun's heat/light.

21. Transfer of heat by collision of particles in a solid.

23. Measure of average energy level of particles in a substance.

26. Stored energy that can be released as heat.

27. Mechanical force created between moving substances in contact;result=heat.