Complete the crossword, then click on "Check" to check your answer. If you are stuck, you can click on "Hint" to get a free letter. Click on a number in the grid to see the clue or clues for that number.

1					2							3
															4
	5														6
7
8												9
										10
								11						12
				13
		14
15
		16											17
										18
19						20
										21
						22
								23

 Check 

Across: 1. the measure of the hotness of a body 3. heat transferring in rays from a hot body 5. prevents loss of heat 6. what most solids, liquids and gases do when heated 8. transfer of heat in moving currents 9. what most solids, liquids and gases do when cooled 12. heat, light, and sound are all forms 13. transfer of heat from particle to particle in a solid 15. water expands when it ------- 16. produced when light is passed through a prism 18. apparatus used in a submarine to see above water 19. light travels in this type of line 22. the separation of the different colours which make up white light 23. for water, this point is 100 degrees

Down: 2. light rays being sent back in the direction they came from 3. light rays changing direction as they pass from air to water 4. for ice, this point is 0 degrees 7. reflected sounds 10. heat energy that does not give a change in temperature 11. these objects are a source of light 14. boiling point of water can be effected by a change in -------- 17. these are what produce the sounds detected by the ear 19. this is caused if an opaque body blocks light 20. events may be seen before they are ----- 21. sound transmission requires this