Across
- 3. Theory that earth is at the center oif the revolving planets and stars
- 5. Motion of one object around another
- 7. trapping of heat by the atmosphere
- 9. An oval shape
- 10. Average distance between the Earth and the sun about 150,000,000 kilometers
- 12. When an object spins around a central axis
- 13. Outer planets are often called this because of there size
- 14. Theory that earth and the other planets revolve around the sun
- 17. Planets object that orbits the sun and has enough ggravity to be spherical, but has not cleared the area of its orbit
- 18. Bodies of rock and ice far from the the sun
- 19. Region beyond neptunes orbit
- 20. Inner core of a comet
- 22. Large round pits on the moon
- 23. Greek word for sun
- 24. Consist of the sun, the planets, their moons and a variety of smaller objects
- 27. Force that attracts all object toward ech other
- 28. When a meteroid enters earths atmosphere friction with the air creates heat and a streak of light appears
- 29. Small irregular rocky objects that the sun and are too small to ge considered dwarf planets
- 30. Loose collections of ice,dust, and small rocky particles whose orbit can be long narrow ellipses
Down
- 1. Region of the solar system between Mars and Jupiter
- 2. Dark, flat areas on the moon formed from huge lava flows
- 4. Greek word for sphere
- 6. inner planets arer often called
- 8. Greek word for color
- 11. Chunks of rock or dust that collide with the moon
- 15. Thin disk of small particles of ice and rock around a outer planet
- 16. Must be round,orbit the sun, and cleared out the region of there orbit
- 21. Clouds of gas and dust form a fuzzy outer layer around comet
- 25. Beyond kuipert belt, extends to about 1000 times the distance between the sun and Neptune
- 26. Meteroids that pass through earths atmosophere and are found on earth