Across
- 1. Inner planets are made mostly of this and metal
- 2. A massive cloud of gas and dust where stars form
- 4. The largest planet formed just beyond the snow line
- 7. Original building blocks of planets
- 8. The force that caused the gas cloud to collapse
- 9. The disk of gas and dust surrounding the young Sun
- 10. Process by which particles stick together to form larger bodies
- 15. Boundary where water and gases can freeze
- 16. Early glowing form of the Sun before fusion began
Down
- 1. Boundary where rocky materials can condense
- 3. Period of intense impacts on inner planets
- 5. The spinning, flattened shape the collapsing cloud became
- 6. Increase in rotation speed as the cloud collapsed
- 11. 99.85 Percent of the solar system’s ____ is found in the Sun
- 12. The Sun becomes a true star when this fusion begins
- 13. Heavy element seeded into the nebula by a supernova
- 14. Explosive death of a massive star