CHROME GRIDS

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Across
  1. 4. What causes day and night on Earth?
  2. 5. the path that an object takes when it moves around another object in space?
  3. 6. the gas that we breathe in?
  4. 7. force that pulls objects toward the center of the Earth?
  5. 9. process of water turning into vapor when heated?
  6. 10. state of matter that has no fixed shape and fills the space it's in?
Down
  1. 1. process by which plants make their own food
  2. 2. closest star to our planet Earth?
  3. 3. largest planet in our solar system?
  4. 8. outer layer of the Earth called where we live?