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

Across 1. ______ _______ is the theory that Earth's lithosphere is broken into plates that move around 5. _________was a supercontinent that existed 245 million years ago and began to break apart 175 million years ago to form the continents we know today. 7. The lithosphere is Earth's solid, rocky, outer layer. It is made of the continents and islands and extends under the entire ____ ______ 9. There are two types of crust, continental and __________ 11. Pangaea split during the Cenozoic Era, an Ice Age occurred, and the earliest ______ appeared a little over two million years ago 14. A ________ eclipse occurs when the moon moves in between the Earth and the sun and blocks sunlight from reaching the Earth; the shadow of the moon falls on part of the Earth 16. The ________ is the part of the Earth System that ncludes all of Earth's water and ice; most of it comes from saltwater in the ocean 18. The core of the Earth is mostly made of _____ 20. The ________ is made of all living things on Earth 21. a scientific ______ is a well tested explanation for a wide range of observations or experimental results. 22. Earth is divided into three _________, the crust, the mantle, and the core

Down 2. The __________ is composed of the Earth's crust and part of the mantle. 3. ______ ________ are part of the lithosphere that float on and independently over the mantle. 4. ________ ________ is the theory that continents can drift apart from one another and have done so in the past. 6. A scientific ________ is a statement that describes what scientists expect to happen under a certain set of conditions 8. A _______ eclipse occurs when the Earth moves in between the moon and the sun and blocks sunlight from reaching the moon. The shadow of the Earth falls on the moon. 10. The ________ is the outermost layer of Earth; it ranges from 5 to 100 kilometers thick 12. The mantle accounts for most of the Earth's ______ 13. The ________ is the middle layer of the Earth, is mostly solid, and is about 2000 kilometers thick 15. The _________ is the outermost sphere of the Earth System and is a mixture of gases. 17. The _________ is spherical, is the innermost layer of the Earth, and is about 2900 kilometers thick 19. Stars are classified by _______, temperature, composition and brightness