1. Which of the terrestrial worlds is the largest?

a. Mercury.
b. Venus.
c. Earth.
d. The Moon.
e. Mars.

2. Which of the terrestrial worlds has the densest atmosphere?

a. Mercury.
b. Venus.
c. Earth.
d. The Moon.
e. Mars.

3. Which of the terrestrial worlds is pictured here?

a. Mercury.
b. Venus.
c. Earth.
d. The Moon.
e. Mars.

4. Which of the terrestrial worlds has been visited by the fewest missions?

a. Mercury.
b. Venus.
c. Earth.
d. The Moon.
e. Mars.

5. Which of the terrestrial worlds is NASA spending your tax dollars on at the rate of 1-2 missions every 26 months?

a. Mercury.
b. Venus.
c. Earth.
d. The Moon.
e. Mars.

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Last modified 10 November, 2006. © Gregory C. Sloan.