Across
- 4. The smaller clumps became comets, icy objects, and what else?
- 7. The solar system was formed 4.7 _______ years ago.
- 9. The sun is the ______ object in the solar system.
Down
- 1. The solar system started as a loose cloud of gas and _____.
- 2. Gravity is an invisible ______ that pulls objects toward each other.
- 3. The more ______ an object is, the stronger its gravitational pull.
- 5. The largest clump became the what?
- 6. All the ____ orbit around the sun.
- 8. The sun's strong gravity pulled the planets into _____.
- 10. What force caused the gas and dust to clump together?