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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.)

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

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

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.)

Suppose that a new planet has been discovered between Venus and Earth. It is about the size of Earth’s Moon. The planet will probably ________. (Select all that apply.)

Which part of the following image of Mars has evidence of tectonic extension? Select the letter associated with that area.

Which of the following is a major difference between Venus and Earth?