Earth's Elemental Crossword Challenge

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Across
  1. 2. - The layer beneath the Earth's crust (6 letters).
  2. 3. - Related to earthquakes or vibrations in the Earth's crust (7 letters).
  3. 5. - The rigid outer layer of the Earth (11 letters).
  4. 7. - The most common group of minerals in the Earth's crust (8 letters).
  5. 9. - The process of one tectonic plate moving beneath another (9 letters).
  6. 11. - Energy derived from the Earth's internal heat (11 letters).
  7. 12. - Organic compounds made of hydrogen and carbon (12 letters).
Down
  1. 1. - The theory explaining the movement of Earth's lithospheric plates (15 letters).
  2. 4. - A mineral or rock that contains valuable substances (3 letters).
  3. 6. - A layer of rock or sediment in the Earth's crust (7 letters).
  4. 8. - The study of minerals and their properties (10 letters).
  5. 10. - Soil or rock that remains frozen for at least two consecutive years (10 letters).