6th Grade Science Review

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Across
  1. 3. rock formed by extreme heat and pressure
  2. 7. layers of rock
  3. 8. the color of a minerals powder
  4. 9. type of soil with largest grain size
  5. 10. a planet makes one trip around its orbital path
  6. 11. alive, or once was
  7. 12. a vibration inside the earth that shakes the surface of the earth
  8. 14. the slow, natural process that causes all of the rocks on earth to change over time
  9. 17. largest layer of earth
  10. 18. type of soil with smallest grain size
  11. 19. solid metal and densest layer of Earth
  12. 22. how light reflects off of a mineral
  13. 24. these are mainly caused on Earth by the moon's gravity
  14. 26. the breaking down of rocks
  15. 27. larger, less dense, gas giants (4 of them)
Down
  1. 1. a mixture of all types of soil, best for growing plants
  2. 2. when you can see less than half of the moon
  3. 4. the most powerful force of weathering on Earth
  4. 5. rock formed by compacted sediment, commonly found on Earth's surface
  5. 6. not alive, never was
  6. 8. longest and shortest days of the year, June 21 and Dec 21
  7. 13. equal amounts of daytime and night time, March 21 and Sept 21
  8. 15. the outer layer of the Earth
  9. 16. boundary where two tectonic plates pull apart
  10. 20. can be solar or lunar, when a shadow is cast in space
  11. 21. boundary where two tectonic plates collide
  12. 23. a planet makes one spin around its axis
  13. 25. rock formed by cooling magma/lava
  14. 26. when the moon appears to be growing