Imagine that there is a drain (like the one in a bathtub) on the ocean floor. If you were to pull the plug and drain all the seawater, you would be able to see the features of the ocean floor.

  !   Click the image see an animation simulating the draining of the Atlantic Ocean. Click and drag the slider back and forth to explore different parts of the sequence.

2. Describe at least three observations from the animation.

  !   Look at the drained Atlantic Ocean and locate the ocean ridge. It is the jagged line that runs north-south through the middle of the Atlantic.