| A | B |
|---|
| Why some areas of ocean are saltier | Evaporation |
| The cause of surface waves in the ocean | Wind |
| Currents | Rivers of water in the oceans |
| Seamounts | Isolated volcanoes on the seafloor |
| Abyssal Plains | The flat portions of the seafloor |
| Mid-Ocean Ridges | Rows of mountains 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 changes in sea level caused by gravitational forces |
| Gulf Stream | An example of a current |
| Hawaii | An example of a seamount |
| crest | The top part of a wave |
| breaker | A tide that "turns over" and crashes onto a beach |
| salinity | The amount of salt in water |
| Continental Margin | includes the continental shelf, slope, and rise |
| Continental Rise | Located at the bottom of the continental slope |
| Arctic Ocean | The ocean mostly covered in ice |
