Science

Edit Answers
12345678910111213141516171819202122232425262728293031
Across
  1. 2. planet: An object that orbits the sun, has enough gravity to be spherical, but does not cleared the area of its orbit.
  2. 5. solid inner core of a comet
  3. 7. Unit (AU): The average distance between Earth and the Sun, about 150,000,000 kilometers.
  4. 8. Earth and other planets revolve around the Sun.
  5. 13. fission: Hydrogen atoms join to form helium.
  6. 15. flares: When the loops in sunspot regions suddenly connect and release a large amount of energy.
  7. 17. Huge loops of gas that often different parts of sunspot regions.
  8. 18. planets: The inner planets.
  9. 21. In a geocentric model Earth is at the center of the revolving planets and stars.
  10. 25. Cloud: The region beyond the Kuiper belt that stretches out more than 1,000 times the length between the sun and Neptune.
  11. 26. Central region.
  12. 27. The inner layer of the sun's atmosphere.
  13. 28. belt: A region of the solar system between Mars and Jupiter.
  14. 29. clouds of gas and dust
  15. 30. The outer layer of the sun, which looks like a white halo.
  16. 31. An oval shape.
Down
  1. 1. Must be round, orbit the sun, and have cleared out the region of the solar system along its orbit.
  2. 3. Loose collections of ice, dust, and small rocky particles whose orbits can be very long and narrow ellipses. (See "Ellipse")
  3. 4. zone: The outermost layer of the sun's interior.
  4. 6. Ice and rock formed into small bodies; the beggining of planets.
  5. 9. The middle layer of the sun's atmosphere.
  6. 10. meteoroids that pass through earths atmosphere and are found on earths surface
  7. 11. belt: A region beyond Neptune's orbit that extends to about 100 times Earths distance from the sun.
  8. 12. giant: One of the four outer planets; they are much larger and more massive than Earth, and they do not have solid surfaces
  9. 14. A thin disk of small particles of ice and rock.
  10. 16. small, irregular, rocky objects that orbit the sun.
  11. 19. Areas of gas on the sun's surface that are cooler than the gases around them.
  12. 20. chunks of rock or dust that are smaller than asteroids
  13. 22. zone: A region of very tightly packed gas where energy moves mainly in the form of electromagnetic radiation.
  14. 23. when a meteoroid enter earth atmosphere friction it's the air creates heat and produces a streak of light
  15. 24. effect: The trapping of heat by way of the atmosphere.