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

Across 4. The study of the earth 5. The fourth state of matter - it exists only at very high temperatures. 8. The study of living organisims. 10. A space scientist who travels to different places in space. 11. Pressing the Ctrl + S keys performs this computer function. 12. The study of planets, stars and space. 14. Unit used for measuring forces. Also the surname of a famous scientest. 15. Unicellular, microscopic organisms. Some are useful and some cause disease 17. Pressing the Ctrl + B keys performs this computer function to selected words. 18. An animal that does not have a backbone. 19. The study of chemicals

Down 1. The basic functional unit of all living organisms. 2. A unit used to measure the intensity or loudness of sound. Symbol: dB 3. A push, pull or twist 6. This is the planet closest to our sun. 7. The study of matter, energy and movement 8. A gas burner used in a laboratory to heat substances 9. The change in state of a liquid into a gas. 13. What you use to type in information on school computers. 16. The ability to do work. It is measured in joules (symbol:J)