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1. Compared to the Earth, Mars is about:

Twice the size One-fourth the size One-sixth the size Half the size The same size

2. Mars has signs of what geological activity in its past?

Volcanism Tectonics Impact cratering Flowing water All of the above

3. Mars' atmosphere is composed primarily of:

Oxygen Carbon dioxide Nitrogen Argon Carbon monoxide

4. Compared to Mount Everest on the Earth, Mount Olympus on Mars is:

Twice as high Ten times as high Half as high Six times as high One-quarter as high

5. The Valles Marineris canyon on Mars was formed by:

Running water Spreading of the Martian crust Catastrophic floods Wind erosion and landslides B and D

6. This picture of Mars' surface shows:

Lava flows Ancient river channels Dust devils Vegetation Martian highways

7. The moons of Mars, Phobos and Deimos:

Are very round in shape Are large like our Moon Are Greek for fear and panic Are probably captured asteroids C and D

8. The meteorite ALH84001, which may harbor evidence of fossil life on Mars, was found in:

Africa Antarctica Asia North America Australia