Unit 3 Part 2 Earth's other Systems

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Across
  1. 2. the sudden movement of rock and soil down a slope
  2. 6. when a species has died out completely
  3. 7. front a boundary between air masses that does not move, sometime rainy weather last for days.
  4. 8. A molten mixture of rock-forming substances, gases, and water from the mantle
  5. 11. very hot melted rock found in Earth's mantle
  6. 12. an opening in the Earth's crust through which molten lava, ash, and gases are ejected.
  7. 13. materials such as water, wind, and sunlight, can be replaced in nature or will not run out
  8. 14. The average weather conditions in an area over a long period of time
  9. 17. natural resources that are found in a limited amount on Earth's surface and will eventually run out
Down
  1. 1. when a cold air mass pushes under a wam air mass, forcing the warm air quickly upward. It often brings stormy weather.
  2. 3. a material found in nature that humans and other living things can use.
  3. 4. the removal of trees from a large area
  4. 5. warm air mass pushes into cold air mass, the warm air goes up and over the cold air mass. It often brings light, steady rain
  5. 6. when a species is in danger of becoming extinct
  6. 9. an area where molten rock from within the mantle rises close to Earth's surface
  7. 10. solid, nonliving substances found in nature
  8. 15. a large region of air that has a similar temperature and humidity
  9. 16. the condition of the atmosphere at a specific place and time
  10. 18. Liquid magma that reaches the surface; also the rock formed when liquid lava hardens.