The _______ colored water is the least dense in this graduated cylinder.

This marine snow is at least how big?

These shells are composed of what substance?

When it is fall in the Southern Hemisphere, what season is it in the Northern Hemisphere?

Which of the following diagrams shows a counterclockwise circulation?

What kind of front is shown in this image?

This moon is closest to which phase?

The flow of water around an ocean basin is called...

What kind of wave is this? (Hint: this picture was taken from a ship at sea!)

Which wave has the lowest frequency?

What force drive surface currents?

What is the name of this device, which measure air pressure?

An increases in acidity represents what kind of change in pH?

If the second high tide today is at 9:30 PM, what time will the first high tide tomorrow occur?