Triton might have been captured by Neptune’s gravity long ago. In what way does the orbit of Triton show this is possible?

Which of these geologic features are found on all of the following planets—Mercury, Mars, and Earth? (Choose all that apply)  

Folded mountain belts are important tectonic landforms. Which of the following statements is the most accurate description of folded mountain belts?

Which of the following are major differences between Io and Europa, moons of Jupiter?

Both Neptune and Uranus have magnetic fields that ________.

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

Which statement is true about the Roche limit? (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.)

Which gas was most efficiently added to the Earth’s atmosphere since the advent of life?

How did these vast valleys on Mars form? (This is a shaded relief map; the colors represent elevation.)