Science Rules

2. The outer layer of the sun, which looks like a white halo.
4. Areas of gas on the sun's surface that are cooler than the gases around them.
5. giant One of the four outer planets; they are much larger and more massive than Earth, and they do not have solid surfaces
8. flares When the loops in sunspot regions suddenly connect and release a large amount of energy.
9. Must be round, orbit the sun, and have cleared out the region of the solar system along its orbit.
11. Central region.
12. Earth and other planets revolve around the Sun.
16. zone A region of very tightly packed gas where energy moves mainly in the form of electromagnetic radiation.
18. effect The trapping of heat by way of the atmosphere.
20. chunks of rock or dust that are smaller than asteroids
24. small, irregular, rocky objects that orbit the sun.
26. when a meteoroid enter earth atmosphere friction it's the air creates heat and produces a streak of light
27. planets The inner planets.
28. Loose collections of ice, dust, and small rocky particles whose orbits can be very long and narrow ellipses. (See "Ellipse")
29. An oval shape.
31. Cloud The region beyond the Kuiper belt that stretches out more than 1,000 times the length between the sun and Neptune.
32. fission Hydrogen atoms join to form helium.

1. solid inner core of a comet
3. The inner layer of the sun's atmosphere.
6. belt A region of the solar system between Mars and Jupiter.
7. Unit The average distance between Earth and the Sun, about 150,000,000 kilometers.
10. Ice and rock formed into small bodies; the beggining of planets.
13. The middle layer of the sun's atmosphere.
14. zone The outermost layer of the sun's interior.
15. meteoroids that pass through earths atmosphere and are found on earths surface
17. Huge loops of gas that often different parts of sunspot regions.
19. A thin disk of small particles of ice and rock.
21. clouds of gas and dust
22. belt A region beyond Neptune's orbit that extends to about 100 times Earths distance from the sun.
23. In a geocentric model Earth is at the center of the revolving planets and stars.
25. planet An object that orbits the sun, has enough gravity to be spherical, but does not cleared the area of its orbit.
30. system Consists of the sun, the planets, their moons, and a variety of smaller objects.