Earths history

12345678910
Across
  1. 6. Age The number of years since a rock was formed.
  2. 8. Sediments are buried deeply and subjected to pressure from weight of sediment above.
  3. 9. Minerals stick the grains of sediment together - just like cement.
  4. 10. Rock that forms when existing rock is exposed to high pressure or high heat or both.
Down
  1. 1. Rock that forms when melted rock cools and hardens.
  2. 2. An unstable element that loses energy to become stable
  3. 3. A geological process where natural forces wear away at rocks and soil.
  4. 4. Rock that forms from compacted sediment.
  5. 5. The weather conditions in an area over a long period of time.
  6. 7. Core A long cylinder of glacial ice recovered by drilling through glaciers in Greenland, Antarctica, and high mountains around the world. They are used primarily to observe climate change.