Continue out and the deeper slope and steep drop into the water is the continental slope. Here you will find little valleys or canyons cut by mud or currents moving across the ocean bottom. The very bottom of the ocean is the plain. Trenches are like very deep ditches in the ocean floor. The deepest trench is deeper than the tallest mountain on land.
Volcanoes are also on the ocean bottom.
The Hawaiian Islands were formed by volcanoes. Class, now that you have seen me point out and discuss the darkest features of the ocean floor, let's see if we can get these parts in the right place. Please put everything aside and get a piece of paper. Please write numbers 1 through 5. Draw from memory the ocean floor and use the numbers through 5 to label the features.