Stardust From Space ~ John Szabo

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Across
  1. 2. Earth's nearest neighbour
  2. 5. molten rock that comes from a volcano
  3. 7. a small object orbiting the sun
  4. 8. this made all the planets
  5. 9. the sun, the planets, their moons, and all the other objects that orbit the sun (2 words)
  6. 12. the layer above the core, but below the crust of the planet
  7. 13. a sudden, rapid explosion of a star throwing matter and energy into space
  8. 14. small particles less then 1mm in size produced from asteroids and comets (2 words)
  9. 15. the ground beneath our feet
  10. 17. a substance made from atoms of only one type
  11. 18. the central part of a planet
  12. 19. the outermost solid layer of a planet
Down
  1. 1. an opening in a planet or moons crust through which molten rock and gas can escape
  2. 3. a rocky or metal object that survives its fall to Earth from space
  3. 4. rock of ice and dust
  4. 6. a person who travels in space
  5. 10. a speck of dust that completely burns up as it travels through the atmosphere (2 words)
  6. 11. the rigid blocks of Earth's crust that move at very slow speeds over the Earth's surface.
  7. 13. intensely hot object that produce energy by burning gas (mainly hydrogen)
  8. 16. a large object orbiting the sun.