Earth's Systems

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Across
  1. 4. the innermost layer of the Earth
  2. 6. an educated guess
  3. 8. the solid, rocky part of the Earth
  4. 10. a set of principles or interacting components
  5. 11. the study of the relationships between living things and their environment
Down
  1. 1. the molten rock layer of the Earth
  2. 2. the portion of the Earth that is water
  3. 3. a mixture of gases that surrounds the Earth
  4. 5. the part of the Earth where life exists
  5. 7. a step by step process to carry out an experiment
  6. 9. the outermost layer of the Earth