Across
- 4. evidence of life from the past, such as fossilized bones, footprints, or leaf prints
- 7. necessary gas for life, also known as O2. 45 percent of earth is made up of it
- 9. a natural spring that sends hot water and steam suddenly into the air from a hole in the ground
- 10. the sudden pushing out of something, such as lava from a volcano
- 11. moving toward the same place
- 13. a chemical element; it is hard, and brittle, with a blue-gray metallic color. 27 percent of the earth is made up of it
- 15. moving apart Oon different directions
- 16. any of Earth’s main areas of land, such as Africa, Asia, and North America
- 19. to examine in detail for a purpose
- 20. a silvery gray metallic color; less dense than other common metals. 8 percent of the earth is made up of it
Down
- 1. a diagram that shows what the inside of something looks like
- 2. the outermost shell of a terrestrial planet
- 3. earths fourth and final layer, solid iron and nickel, hottest layer
- 5. earths third layer, very hot, mostly molten iron and nickel
- 6. hot liquid rock on the surface of Earth
- 8. a strong, hard magnetic silvery-gray metal, much used as a material for construction and manufacturing. 5.8 percent of the earth is made up of it
- 12. a sudden shaking of Earth’s surface
- 14. hot, second layer of earth, mainly magma
- 17. the science that deals with the earth’s physical structure and substance, its history, and the processes that act on it
- 18. a feature that forms ont eh surface of a planet,such as a mountain, channel, or sand dune