Inner Planets Review

The planets were formed from a cloud of dust and ionized gases called ...

• nebula

• galaxy

• constellation

• protostar

Which is NOT considered one of the general characteristics of the inner planets?

• many moons

• metallic cores

• rocky surfaces

• thinner atmospheres

Which is the fastest planet (revolution)?

• Mars

• Venus

• Earth

• Mercury

Which has a thick atmosphere of CO2 and Sulfuric Acid?

• Earth

• Mercury

• Venus

• Mars

Which is the only inner planet that is spinning backwards in a clockwise direction?

• Earth

• Mars

• Mercury

• Venus

Which inner planet has the shortest day (rotation)?

• Mercury

• Venus

• Earth

• Mars