6th grade Solar System

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Across
  1. 2. these usually come from asteroids or comets, they travel in space without an orbit
  2. 3. the sun is ¼ made of this gas
  3. 8. the outer layer of the sun’s atmosphere is called this, it is very visible during a solar eclipse
  4. 9. he was to first to come up with the geocentric concept of the universe
  5. 10. this planet’s rings are made mostly of ice and rock
  6. 13. the solar system was formed from a giant ____
  7. 14. he discovered the orbits of the planets are ellipses
  8. 15. gases/heat that erupt into space
  9. 18. huge loops of gases
  10. 19. Was able to work out the arrangement of the known planets around the sun
  11. 20. he thought that the planets moved in small circles carried along bigger circles
  12. 23. the ___ ___ consists of the sun, 8 planets, their moons and several other smaller objects
  13. 25. Mars’ atmosphere is made mostly of this gas ___ ___
  14. 27. most comets are found here, way out beyond Neptune
  15. 30. the sun is ¾ made of this gas
  16. 31. he discovered Jupiter’s largest 4 moons
  17. 34. a piece of meteor that has made it to the surface of the planet
  18. 36. Earth and ___ are much alike in their size and density
  19. 37. the largest dwarf planet
  20. 38. the Inner atmosphere of the sun is called the
  21. 40. this is the chemical reaction that is happening in the sun, it releases enormous amounts of heat and light
  22. 42. this object accounts for 99.85% of the mass of our solar system
Down
  1. 1. the Middle layer of the sun’s atmosphere is called this
  2. 4. the smallest terrestrial planet
  3. 5. Jupiter’s big red spot is a ___
  4. 6. Pluto was designated this in 2006
  5. 7. model that shows Earth at the center of the solar system
  6. 11. distance in space is measured in these units
  7. 12. aside from earth, which inner planet once had liquid water on its surface
  8. 16. found between Mars and Jupiter- is filled with rocky objects
  9. 17. areas on the sun that are cooler
  10. 21. a large chunk of rock that has entered Earth’s atmosphere and is burning up
  11. 22. they think that the sun will burn out in 5 ___ years
  12. 24. earth’s solar system is part of the ___ ___ galaxy
  13. 26. from Earth to the sun is ___AU
  14. 28. the gas giants are mostly made of this gas
  15. 29. wind electrical particles coming off the sun
  16. 32. this area is beyond Neptune’s orbit but before the Oort Cloud
  17. 33. model that shows the sun at the center of the solar system
  18. 35. a large chuck of rock smaller than an asteroid floating in space
  19. 39. means “sun”
  20. 41. this planet rotates on its side