Earth and Space!

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Across
  1. 2. A rocky object that orbits the Sun.
  2. 8. The spinning of Earth on its axis.
  3. 9. A giant cloud of dust and gas in space.
  4. 10. The orbit of Earth around the Sun.
  5. 12. The layer of gases surrounding Earth.
  6. 13. Waves of energy traveling through the ground.
  7. 16. The process where rock and soil are worn away.
  8. 18. A celestial body that orbits a star.
  9. 21. The solid outermost layer of Earth.
  10. 22. Shaking of the ground due to tectonic movement.
  11. 23. A huge system of stars, dust, and gas bound by gravity.
  12. 24. The force that pulls objects toward one another.
  13. 26. A mountain that erupts with magma, ash, and gases.
  14. 28. Everything that exists — all space and matter.
Down
  1. 1. The curved path of a planet or moon.
  2. 2. The scientific study of objects in space.
  3. 3. Large-scale movement of Earth’s plates.
  4. 4. The daily rise and fall of sea levels.
  5. 5. A huge ball of hot gas that shines in space.
  6. 6. The system of everything that exists in space.
  7. 7. Relating to the Moon.
  8. 11. The link between space and time in physics.
  9. 13. Relating to the Sun.
  10. 14. An object that orbits a planet; natural or artificial.
  11. 15. Related to the force of magnets.
  12. 17. The explosive death of a massive star.
  13. 19. Melted rock that erupts onto Earth’s surface.
  14. 20. A “shooting star” burning in Earth’s atmosphere.
  15. 25. A chunk of ice and dust that grows a glowing tail near the Sun.
  16. 27. An imaginary line Earth spins on.