Flashcards
Moon Formation (11)
Flashcards do conjunto (5)
- 1What are the two main types of Moon rocks?Anorthosite (intrusive ign. rocks with plag-spar. Common in light parts)
Basalt (dark-extrusive. Common in dark maria.) - 2☼Describe the fission hypothesis of moon formation.☼Moon split from the Earth, from what is now the Pacific Basin.
(Wrong) - 3☼Describe the Accretion hypothesis of moon formation.☼-Moon accreted from dust & debris that orbited early Earth as rings. (Wrong)
- 4☼Describe the Collision hypothesis of moon formation☼Mars-sized object collided with Earth; debris coalesced into the moon. (maybe right)
- 5☼Describe the capture hypothesis of moon formation☼-Moon formed elsewhere; its orbit was disturbed; it approached Earth and got captured by its gravitational fields.
(possible)