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To a small child, the ocean and the pond seem very much
the same. However, there are important differences to point out. To begin with, a pond is a very small body of water. The ocean covers more than half of the earth’s surface. Ponds are very shallow, but the ocean is seve
ral thousand miles deep in most places. Some green pond plants are rooted in mud on the floor of a pond. Because of the ocean’s depth, the sunlight can’t reach the ocean’s floor, hence no green plants grow there. Ponds
contain fresh water, which means there is no salt content. The ocean, though, is the largest body of salt water on earth. While they are both bodies of water, there are clearly major differences between the ocean and a pond.
Compare and Contrast