What is the Moon Collision Theory?, It says the Moon was captured by Earth’s gravity after forming near Jupiter, It states that the Moon formed from debris after a massive collision between early Earth and a Mars-sized body., What was the size of the object that collided with Earth?, It was smaller than the Moon., It was about the size of Mars., What is the name often given to the Mars-sized body?, Apollo., Theia, Why do scientists think the collision happened at a glancing angle?, Because it allowed material to be thrown into orbit instead of completely destroying Earth., Because a direct hit would have created two identical Earths, How did the debris form the Moon?, The debris orbited Earth and gradually clumped together due to gravity., The debris instantly froze and became the Moon in one day., What evidence from Moon rocks supports the theory?, Moon rocks contain large amounts of water and plant fossils.Moon rocks contain large amounts of water and plant fossils., Moon rocks have similar isotopic compositions to Earth’s rocks., How are Earth and Moon rocks similar?, They share nearly identical oxygen isotopes., They are completely different in every chemical element., Why is the Giant Impact Theory widely accepted?, Because it explains the Moon’s size, composition, and orbit., Because it was proven by astronauts watching the collision happen., What is one challenge to the theory?, Some models struggle to fully explain the exact chemical similarities.Some models struggle to fully explain the exact chemical similarities., Scientists cannot find the Moon., How does the theory explain the Moon’s orbit?, The Moon was pushed into orbit by solar wind., The debris formed in orbit around Earth and stayed there due to gravity.

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