giant impact theory

Noun CEFR C1

Definitions

The theory that the Moon was formed from the impact of the Earth with a hypothetical protoplanet some 4.5 billion years ago during the Hadean eon, first proposed by geologist Reginald Daly.

CEFR level

C1

Advanced
This word is part of the CEFR C1 vocabulary — advanced level.

See all C1 English words →

See also

giant isopod giant kelp giant kelpfish giant kettle giant kill giant kingfisher

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