| A | B |
|---|
| chemosynthesis | process for making food that does not require chlorophyll |
| consumers | organisms that get their food by eating producers or consumers |
| decomposers | organisms that break down dead organisms and return butrients to the ecosystem |
| density current | currents in deep water that form when dense seawater sinks |
| ecosystem | community of organisms and the nonliving factors that affect them |
| food chains | systems in which energy is transferred from producers to consumers and decomposers |
| nekton | organisms that swim freely |
| photosynthesis | process for making food and oxygen using chlorophyll, sunlight, carbon dioxide and water |
| plankton | tiny marine producers |
| producers | organisms that make their own food |
| salinity | measure of the amount of salts dissolved in the ocean |
| surface currents | currents caused by wind |
| thermocline | ocean layer that experience rapid temperature change with increasing depth |
| tide | the rise and fall in sea levels |
| upwelling | current that brings to the surface cold deep seawater |
| waves | rhythmic disturbances that carry energy |
| Where does earth's rain and snow come from? | the oceans |
| What is the salinity the measure of? | dissolved salts |
| What do many animals use to form bones and shells? | calcium |
| Producers containing chlorophyll perform what process? | photosynthesis |
| A zone in the ocean where temperatures change rapidly is the what zone? | thermocline |
| An ocean current only a few hundred meters deep and powered by the wind is a what? | surface current |
| What affects a tidal range? | the position of the moon |
| What are the four steps in the formation of the earth's oceans? | volcanoes erupt releasing lava, ash, gas including water vapor; water vapor condenses to make clouds; torrential rains begin to fall from clouds; water accumulated in the lowese parts of the Earth's surface |
