Earth Science Unit 1 Review

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Across
  1. 1. Like a planet, but smaller and has other space objects in its orbit path
  2. 4. Force of attraction
  3. 5. Dwarf planet that used to be the ninth planet from the sun
  4. 6. Living things in an ecosystem
  5. 10. Semi-molten, plastic layer beneath the lithosphere
  6. 13. Most common element
  7. 15. Type of large planet that is made mostly of hydrogen and helium
  8. 17. Type of galaxy with older stars and little dust left
  9. 18. Type of planet with a solid surface
  10. 19. Ribbons of green to red light formed when solar winds hit the earth’s magnetic field.
Down
  1. 2. Non-living things in an ecosystem
  2. 3. How light and energy travel through space
  3. 7. Type of large planet that is made mostly of nitrogen, carbon, oxygen, and sulfur
  4. 8. Fourth planet from the sun
  5. 9. Type of galaxy with younger stars and lots of space dust
  6. 11. Area of space with lots of hydrogen-- where stars are likely to form
  7. 12. All of the water on earth (97% saltwater and 3% freshwater!)
  8. 14. Collection of billions of stars and their planets
  9. 16. Transition from earth’s atmosphere to space helps block solar radiation