Science Project #1 Crossword Puzzle

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Across
  1. 4. Earth’s dense, metallic center
  2. 7. specific type of metal
  3. 10. liquid water on Earth
  4. 11. all living organisms on Earth
  5. 12. the solid part of Earth, including the soil and Earth’s rocky center
  6. 13. outer part of Earth’s magnetic field
  7. 15. force of attraction between every object and every other object that exists because of mass
Down
  1. 1. plastic, flowing layer within the mantle
  2. 2. thick middle layer in the solid part of Earth
  3. 3. rigid layer that includes the crust and uppermost mantle
  4. 5. rocky, outermost layer of Earth
  5. 6. amount of mass, or substance, in a material
  6. 8. frozen water on Earth
  7. 9. a shape like a ball
  8. 14. layer of gasses surrounding Earth