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Biology 7 Online
SkyVoltage43:

Planet A is an inner planet with no moon and hardly any atmosphere. Planet B is an inner planet with no moon but with a dense atmosphere. Which pair of planets is being described? Mars and Venus Mercury and Earth Mercury and Venus Mars and Earth

SkyVoltage43:

@JustSaiyan

JustSaiyan:

Mars and Venus

JustSaiyan:

Mars has a very thin atmosphere.

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