social studies the earth

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Across
  1. 4. The beginning of seasons.
  2. 6. Seams in the crust.
  3. 10. The process of dropping eroded material.
  4. 11. Part of a whole.
  5. 12. Contains all the solid, liquid, and gaseous water of the planet.
Down
  1. 1. Provide something necessary, to maintain.
  2. 2. Molten rock.
  3. 3. Contains all the planet's living things.
  4. 5. The breaking apart of rocks, while erosion carries away the pieces.
  5. 7. Contains all of the cold, hard solid land of the planet's crust (surface), the semi-solid land underneath the crust, and the liquid land near the center of the planet.
  6. 8. Period during which hours of daylight and hours of darkness are of equal length everywhere on Earth.
  7. 9. Contains all the air in earth's system.