1													2		3					4
5						6
																		7
						8
9
		10							11
											12
13												14
																15
			16
								17
	18			19																20		21
22
														23		24
								25

Across 3. empty space 5. when __________ increases the energy of the wave decreases; how long a wave is 8. causes sunburns 10. a particle of light; packets of energy 12. the color that reflects all colors 13. A very large and powerful wave 14. orbits around the earth and reflects the sun's light 15. a type of wave used to detect broken bones 16. the color that absorbs all colors 17. The bending of waves around a barrier or through an opening 22. The bending of light at the boundary between two mediums 23. how tall a wave is 25. Waves transport energy but not ____________________.

Down 1. A disturbance that moves energy through matter and space 2. the bouncing back of a wave after it strikes a barrier or an object 4. waves that can only travel through a medium. 6. The branch of science that studies the brain. 7. different type of waves that can travel through space 9. a type of wave that refracrs, reflects and is absorbed by different colors 11. when the energy of a photon in an electromagnetic wave is taken up by matter 14. used to cook food 18. Material through which a wave travels 19. a device that produces intense light of only one wavelength and color 20. travels best through a soild but cannot travel through a vacuum 21. Number of waves that pass a point in a certain amount of time 24. a property of sound that changes with frequency