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Astronomy
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Gas Giants and Ice Giants
Grade Level
Astronomy
AST.155 Gas Giants and Ice Giants
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Which evidence would most directly support calling a giant planet a gas giant instead of an ice giant?
A
Its mass is mostly hydrogen and helium, with a very large fluid envelope.
B
It formed far beyond Neptune from mostly icy planetesimals.
C
It has a blue color caused by methane absorption.
D
It has a high proportion of water, ammonia, and methane compounds inside.
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