Do Now

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Across
  1. 2. a proposed answer to a question
  2. 5. the air that surrounds Earth
  3. 7. a group of atoms joined in a particular way
  4. 13. a scientist who studies stars, planets, and other objects in the universe
  5. 14. an arrangement of stars as seen from Earth
  6. 15. all the land on Earth
  7. 16. a scientist that studies ecosystems
  8. 17. the ability to make things move or change
Down
  1. 1. the invisible pull between Earth and other objects
  2. 3. a living thing, such as animals or plants
  3. 4. information that supports an answer to a question
  4. 6. all the water on Earth
  5. 8. to describe how something works or why something happens
  6. 9. water in the form of an invisible gas
  7. 10. an organism that breaks down dead organisms
  8. 11. the stuff that things are made of
  9. 12. all the living things on Earth