Across
- 1. the name for the four inner rocky planets like earth that are made of high density materials
- 4. a large body in orbit around a star that is in process of becoming a planet
- 5. the process where a young , molten earth separated into layers ( curst , mantle , core ) based on density
- 7. Cloud of dust and gas
- 8. a measure of mass per volume , this property determined which materials sank to the core and which stayed at the surface
- 9. a type of unstable chemical element that decays and provides the internal energy needed for mantle conection
Down
- 2. the process where gravity pulls small particles together to form large bodies like planets
- 3. decay provides heat for early earth to stay molten and differentiate into layers
- 6. the force that caused the solar nebula to collapse and later pulled the densest materials to earths center
- 10. the heavy element that sank to the core during earth formation