Types of Rocks

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Across
  1. 3. Rock Formed from small pieces of rocks and dead living things.
  2. 4. A rough, hard rock and often have fossils inside.
  3. 6. A rock with large grains and many holes.
  4. 7. A glass-like rock used in making tools and weapons.
  5. 10. A fine-grained rock which formed from shale.
  6. 12. A rock with large grains but finer than granite.
  7. 15. A non-foliated metamorphic rock which was formed from limestone.
  8. 16. Formed when rocks are heated and squeezed below the Earth's surface.
  9. 17. A rock with smooth surface and sometimes have fossils inside.
  10. 19. Also called a plutonic rock, which forms under the Earth's surface.
  11. 20. A smooth rock with many thin layers that splits easily.
Down
  1. 1. Animal remains that can be found inside a rock.
  2. 2. A rock with a rough surface and round grains.
  3. 5. Also called as volcanic rock, which forms on the Earth's surface.
  4. 8. A hard rock and fine grains.
  5. 9. A rock with large grains and dark color
  6. 11. A rock with large grains and a rough surface.
  7. 13. Rocks formed when hot magma cools over time.
  8. 14. A hard non-foliated rock formed from sandstone.
  9. 18. A foliated metamorphic rock that forms from granite.