M2 How We Know What’s Deep Inside the Earth

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Across
  1. 4. Green rock found in the mantle
  2. 8. This layer is 3-40 miles thick
  3. 9. A device to measure the waves produced by earthquakes
  4. 10. A device that is sent somewhere far or dangerous to make discoveries
  5. 11. The outer core is made mainly of this (6,4)
Down
  1. 1. This layer accounts for 84% of the Earth's volume
  2. 2. This word describes the plates of the crust and their movement
  3. 3. Besides the heat, given as a reason why we cannot visit the centre of the Earth
  4. 5. This metallic element is also found in the core
  5. 6. The core of the Earth is as hot as the surface of this other object in the solar system
  6. 7. This word means 'of earthquakes'