| A | B |
|---|
| Why some areas of ocean are saltier | Evaporation |
| The cause of surface waves in the ocean | Wind |
| Areas where salt and fresh water mixes | Estuaries |
| Seamounts | Isolated volcanoes on the seafloor |
| Abyssal Plains | The flat portions of the seafloor |
| Mid-Ocean Ridges | Where new crust is formed |
| Trenches | Deepest part of the earth's surface |
| Continental Slope | Steep area where ocean depth increased rapidly |
| Pacific Ocean | The ocean with the most trenches |
| Atlantic Ocean | Ocean with the most abyssal plains |
| Continental Shelf | Shallow zone of ocean that is submerged continent |
| Tides | Daily periodic changes in sea level caused by gravitational forces |
| Chesapeake Bay | An example of an estuary |
| Hawaii | An example of a seamount |
| crest | the top part of a wave |
| trough | the bottom part of a wave |
| salinity | the amount of salt in water |
