Earth: Yesterday, Today, and Tomorrow

1234567
Across
  1. 2. mantle the upper part of the mantle
  2. 4. the crust and upper mantle of the earth
  3. 6. the outer layer of the earth
  4. 7. the angular distance of a place north or south of the earth's equator
Down
  1. 1. the angular distance of a place east or west of the merdian
  2. 3. tectonics a theory explaining the structure of the earth's crust and associating phenomena
  3. 5. a sudden and violent shaking of the ground causing damage