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Ch8 Moon&Mercury Pt2
Vocabulary
| Term | Definition |
|---|---|
| Meteoroid Impact | common event on the Moon and Mercury where there is virtually no atmosphere |
| Regolith | surface dust on the Moon caused by billions of years of bombardment (impacts) |
| Micrometeoroid | small chunk of interplanetary debris ranging in size from a dust particle to a pebble |
| Microcraters | submillimeter sized craters produced by the high-velocity impact of cosmic dust particles |
| Rille | dry channel on the surface of the Moon where molten lava flowed in the past |
| Crater Chain | line of craters along the surface of an astronomical body from interplanetary debris breaking apart before impact |
| Intercrater Plains | regions on Mercury that do not show extensive cratering but are relatively smooth |
| Scarp | feature on Mercury from cooling and shrinking of the crust forming a wrinkle on the surface |
| Orientale Basin | large multi-ringed impact basin/mare on the Moon |
| Caloris Basin | one of the largest impact basins in the solar system, found on Mercury |
| Volcanism | eruption of molten material onto the surface of the Earth, other solid-surface planet, or moon |
| Co-Formation Theory | proposes that the Moon formed in orbit around Earth at the same time as the Earth |
| Capture Theory | suggests that the Moon formed elsewhere in the solar system and was captured by Earth's gravity |
| Fission Theory | proposes that the Moon somehow separated (split off) from the Earth |
| Giant Impact Theory | suggests that the Moon formed from the ejecta of a collision between the proto-Earth and a Mars-sized planetesimal |
Created by:
john_bailey720
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