A(n) ________ measures the variation in sea-surface elevation, which mimics the shape of the seafloor.

How do icebergs in the North Atlantic Ocean originate?

________ account(s) for the largest usage of groundwater in the United States.

________ account(s) for the largest usage of groundwater in the United States.

The water table slope is known as the ________.

The near-surface zone that contains some of the water that soaks into the ground is called the ________.

Which of the following areas does NOT have a mid-ocean ridge?

________ rocks are composed almost entirely of light-colored silicates.

The sizes, shapes, and arrangements of mineral grains in an igneous rock are known as ________.

What force pushes groundwater from pore to pore below the water table?