| A | B |
|---|
| salinity | measure of the amount of salts dissolved in seawater |
| 35 grams | amount of dissolved salts in 1 kg of ocean water |
| shells | organisms use calcium in seawater to make these |
| desalination | removing salt from ocean water |
| wave | rhythmic movement that carries energy through matter or space |
| circular pattern | how water molecules move in a wave |
| friction | what occurs with the ocean floor that causes waves to break |
| breakers | collapsing waves at shore |
| wind | this causes the waves to be higher |
| tides | rise and the fall in sea level |
| beach | has two high tides and two low tides a day |
| spring tide | when the sun, moon, and Earth are in a straight line |
| neap | when the Earth, Moon, and Sun are in a 90 degree (right angle) with each other it causes this kind of tide |
| surface currents | powered by the wind |
| upwelling | vertical circulation in the ocean that bring deep cold water to the ocean surface |
| fish | upwelling makes good places to do this |
| density current | a current that forms when a mass of seawater becomes more dense than surrounding water |
| cold salt water | this type of water is the densest |
| estuary | where the mouth of a river opens into an ocean |
| Chesapeake Bay | an example of an estuary |
| corals | living organisms that make a hard calcium shell around themselves |
| reefs | wave resistant structures that corals make |
| algea | main producers in the ocean |
