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staedtler staedtler
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7 years ago
Based on its mean density, the planet Pluto appears to be composed of
A)   rock and iron.
B)   a mixture of rock and ice.
C)   gases such as methane and ammonia, possibly with a small, liquid core.
D)   the very lightest elements, hydrogen and helium.
Textbook 
Discovering the Universe

Discovering the Universe


Edition: 7th
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7 years ago
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