The document discusses the major bodies of water on Earth. It describes the four oceans - Pacific, Atlantic, Indian, and Arctic - with the Pacific being the largest and deepest. It also mentions coral reefs, how they are formed in warm, shallow seas from coral polyps' skeletons growing on top of old skeletons. Finally, it outlines the three ocean zones defined by sunlight penetration: the sunlight zone, twilight zone, and sunless zone.

1. WATER, WATER, EVERYWHERETHE EARTH’S OCEANS AND SEASJAMEL THOMASEARTH SCIENCE 203

2. MAJOR BODIES OF WATERFour oceans: Pacific, Atlantic, Indian, and Arctic

3. Pacific is largest and deepest

4. 64, 186,300square miles