Science sentences!

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Across
  1. 3. ___ are surrounded by land.
  2. 7. An ___ is a landform surrounded by water.
  3. 10. One trip around the Sun is one ___.
  4. 13. Much of the freshwater on earth is ____ and we pump it with wells.
  5. 17. You can drink ___, not saltwater.
  6. 18. ___ is the closest planet to the Sun.
  7. 19. ___ tectonics collide and build up as mountains.
  8. 20. Water ____ causes land to wash away over millions of years.
  9. 23. The ___ planets are closer together.
  10. 24. Mount Everest is the tallest ___ in the world.
Down
  1. 1. The Earth is the ___ planet in the Solar System.
  2. 2. There is no ____ in space.
  3. 4. The ___ is our closest star to Earth.
  4. 5. ___ is the biggest planet in our Solar System.
  5. 6. ____ is the smallest planet in the Solar System.
  6. 8. Most of the water on Earth is Saltwater.
  7. 9. Part of the Earth is nighttime, while the other part is ____.
  8. 11. ___ are large balls of fire.
  9. 12. The ___ star to Earth is the Sun.
  10. 14. ___ carry water downhill.
  11. 15. The ___ spins but you can't feel it.
  12. 16. The Earth orbits the ___ every year.
  13. 21. There are ___ different planets in the Solar System.
  14. 22. There is no ___ in space.