Space and Earth Systems

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Across
  1. 3. Animals and plants rely on this sphere to breathe.
  2. 4. What we see of the moon that is illuminated.
  3. 7. The number of stars in our solar system.
  4. 8. Most of the Earth's water is found in the form of ________.
  5. 10. This sphere contains all living things.
  6. 12. This keeps the Earth orbiting the sun.
  7. 14. Rivers, lakes, groundwater, and glaciers are all made up of _________.
  8. 15. The Earth's _______ causes days and nights.
Down
  1. 1. The sun, Earth, and moon create a ___________.
  2. 2. The constellations that can be seen year round are called _______ constellations.
  3. 5. The amount of the moon that is lit up by the sun.
  4. 6. This sphere helps keep plants from being swept away by streams.
  5. 9. The closer a star is to earth the _______ it will be.
  6. 11. This sphere includes rain, snow, and glaciers.
  7. 13. The Earth's _______ takes 365 days.