Unit 3 Lesson 1

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Across
  1. 4. Evidence that Earth's interior contains liquid and solid layers
  2. 5. The force responsible for pulling all matter together
  3. 7. 4.6 billion years ago, a cloud of gas and dust began to pull together and rotate
  4. 9. A source of heat within the Earth
  5. 11. Seismic waves travel ______ through rigid, dense rock
  6. 12. These waves move rock side-to-side and can only travel through solids
  7. 15. This layer is a liquid due to very high temperatures
  8. 16. The outermost physical property layer. This layer is in a solid state
  9. 18. A semi-solid physical property layer of the mantle below the lithosphere
Down
  1. 1. The force of gravity pulled more dense materials towards Earth's core and less dense materials towards the crust
  2. 2. These waves squeeze rock in the same direction the wave is traveling. They can travel through solids, liquids, and gases
  3. 3. A solid physical property layer beneath the asthenosphere
  4. 6. This layer is under immense pressure and is a solid
  5. 8. Scientists collect and record seismic-wave data with these devices
  6. 10. The outermost compositional layer of the Earth
  7. 13. Waves of energy that travel through rock due to earthquakes
  8. 14. The compositional layer beneath the crust
  9. 17. The compositional layer that makes up the center of the Earth