Smartbook 7
Apollo mission results show that Moon and Earth rocks have differences; for example, a lack of low-melting-point metals in Moon rocks. The density and structure suggest the Moon has less iron than Earth. What do these suggest is a likely model of the Moon's formation?
A Mars-sized object hit Earth after Earth differentiated, splattering low-density mantle and crust material into orbit to form the Moon.
Which of the following is evidence against the hypothesis that Earth and the Moon formed together side-by-side from a common cloud of gas and dust?
The Moon has a lower fraction of iron than Earth does.
Which details about the Moon are explained by the violent-birth hypothesis?
The Moon's iron core is very small for its size. The Moon has little water. The Moon's chemical composition is similar to Earth's but not identical.
The hypotheses for the formation of the Moon make different predictions about the Moon's chemical composition. Select all that are disproved by the fact that the Moon has a composition similar, but not identical, to Earth's.
capture hypothesis fission hypothesis twin formation hypothesis
