Science Test
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| What is the relationship between density and water temperature? | The relationship between density and water temperature is that temperature affects density
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| What three factors affect surface currents? | The three factors are continental deflections, the Coriolis effect, and global winds.
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| What happens to ocean currents as they approach a body of land? | When ocean currents approach land they are deflected and change direction.
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| What causes convection currents to form? | What causes convection currents to form is differences in water density.
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| What causes upwellings? | What causes upwellings is when the winds cause warm, surface water currents to go to the bottom of the ocean and warm water is replaced by cold water from the deep water.
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| What is the relationship between ocean winds and currents? | The relationship is that the direction of the ocean winds impacts the directions of the currents.
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| What does heat do in the formation of convection currents? | Pushes cold water to the current.
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| What causes an increase in density and results in deep ocean currents? | Temperature causes an increase in density and results in deep ocean currents.
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| What has the greatest effect on the growth of ocean life? | The greatest effect is upwelling.
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| How does heat energy move in the global ocean? | Heat energy move with warm surface currents and convection currents because they bring heat energy to other parts of the world.
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| What are the three steps that show the energy transfer that create ocean currents? | The three steps are: sun heats the atmosphere, then wind forms from pressure differences, then surface currents form.
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| What type of current happens when the surface water becomes denser and sinks? | The type of current that happens is deep currents.
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| What is an upwelling and why is it important to ocean life? | Upwelling is when warm water is replaced by cold water and it’s important to ocean life because upwelling provides nutrients for fish and seabirds.
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| If a region of the ocean has a large amount of salt water, how would the movement of water be affected in that area? | It will be affected because the water molecules move closer together and the more salinity the denser and denser water sinks and travels along the bottom of the ocean and cerin currents form and deep currents.
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| Describe how ocean waves and currents transfer solar energy around the globe. Remember what water transfers! | They transfer by the Global circulation and convection currents carry about 40% of the energy. A large amount of solar energy gets absorbed near the equator and ocean currents carry this solar energy from the equator to the poles.
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| Ocean currents | The oceans contain stream-like movements of water.
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| Surface current | Ocean currents that occurs at or near the surface of the ocean, caused by wind.
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| Coriolis Effect | The deflection of moving objects from a straight path due to Earth’s rotation.
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| Deep currents | Movements of ocean water far below the surface.
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| Convection current | The movement of water that results from density differences.
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| Upwelling | Warm, surface water is then replaced by cold, nutrient-rich water in a deep ocean.
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