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Examine the following image of Mars carefully, and then select the letter associated with a shield volcano.

Using the following shaded relief map, select a divergent plate boundary.

What are the circular features with dark centers?

Why is the Earth a dynamic planet, whereas the Moon and Mercury have undergone very little change during the last 3.5 billion years? (Select all that apply.)

Why is the Earth a dynamic planet, whereas the Moon and Mercury have undergone very little change during the last 3.5 billion years? (Select all that apply.)

Select the letter on the following cross section of Earth that shows where the Silicic continental crust is made.

What is the probable origin of the features shown in the following image of the surface of Mars?

In which ways is the Oort cloud different than the Kuiper Belt? (Select all that apply.)

What is the most likely cause of the radial tectonic features on this part of Venus (see the following image)?

In which ways is the Oort cloud different than the Kuiper Belt? (Select all that apply.)