Solar System Formation

2. Smaller bodies collide and stick together, forming larger bodies in a process called _______.
5. ______% of the material in the solar nebula became the sun.
7. process in which objects are broken apart
8. When a nebula reaches a certain size and mass, it is more likely to ___________.
12. the direction of rotation & revolution for most objects in the solar system
13. the large shock wave sent out when the sun began nuclear fusion
15. small rocky material ended up here
16. Anything that has _______ has gravity.
17. A planetesimal becomes a __________ when it has swept its orbit clean.

1. the force that holds massive objects/systems together
3. a process in which particles come out of the gas phase and form small pieces of solid or liquid
4. objects in the Kuiper Belt are mostly made of this
6. "little planets"
9. The _____________ of an object largely determined where it ended up in the solar system.
10. anytime two or more objects hit each other
11. the nebula became a _______ when it started to collapse and spin
14. a large cloud of gas and dust in space