Earth and Space Vocabularies

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Across
  1. 1. The rigid, outermost rocky shell of our planet.
  2. 6. The relatively thin part of the earth's crust which underlies the ocean basins.
  3. 8. An object that's reduced to liquid form by heating.
  4. 9. The splitting apart of a single tectonic plate into two or more tectonic plates.
  5. 11. A supercontinent that incorporated almost all the landmasses on Earth.
  6. 14. Massive slab of solid rock made up of Earth's lithosphere
  7. 15. A current in a fluid that results from convection.
  8. 16. Relating to an earth vibration caused by something else.
  9. 18. The force exerted on a surface by the air above it as gravity pulls it to Earth.
  10. 20. A measure of mass per unit of volume.
Down
  1. 2. The degree of hotness or coldness of the atmosphere on some chosen scale.
  2. 3. The part that is responsible for generating the planet's magnetic field.
  3. 4. A natural substance composed of solid crystals of different minerals that have been fused together into a solid lump.
  4. 5. The mostly-solid bulk of Earth's interior.
  5. 7. The relatively thick part of the earth's crust that forms the large landmasses.
  6. 10. The hot solid material with high pressure found in the centre.
  7. 12. The mechanically weak region of the upper mantle of Earth.
  8. 13. The region of the earth's atmosphere above the stratosphere and below the thermosphere, between about 30 and 50 miles (50 and 80 km) in altitude.
  9. 17. The boundary between the crust and the mantle in the earth.
  10. 19. The outermost layer.