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17 Cards in this Set
- Front
- Back
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Why are the Earth's oceans salty?
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rain washed salts into them
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Which description best characterizes the seafloor?
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similar to the continents
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Ocean waves move water
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in a circular motion
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Ocean surface currents are caused by
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wind
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Density currents move ocean water
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downward
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Which situation describes a point source ocean pollutant?
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a nearby volcanic eruption
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What causes coral bleaching?
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slight changes in water temperature
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Upwelling brings deep, cold ocean water to the surface.
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true
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Surface waves have long wavelengths.
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False
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Spring tides occur when the Moon is new or full.
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True
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Tsunamis are large, circular systems of ocean currents.
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False
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Neap tides occur when Earth, the Moon and the Sun form a right angel.
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True
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Describe the amount of light received by each of the three ocean zones. Which zone contains the greatest number of living things?
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Surface Zone - most light
Deep Zone - least light Middle Zone - small amount of light Surface zone has the greatest number of organisms. |
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Contrast these parts of a wave - crest, trough, and wavelength.
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Crest - highest point of a wave
Trough - lowest point of a wave Wavelength - distance between two crest or two troughs. |
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Explain how ocean currents affect weather and climate. You must include the following terms in your answer: moisture, surface currents, thermal energy.
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Surface currents transfer thermal energy and moisture to the surrounding air.
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How might low calcium levels in the oceans affect coral reefs:
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Corals use calcium to build their skeletons. Some algae that live in the corals use calcium too.
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Hypothesize how tides might be affected if the Moon were closer to the Earth.
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If the moon and the earth were closer their gravitational pull would be stronger. This would make high tides higher.
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