oceanography terms
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| Oceans cover about _____ of the Earth's surface. | 70%
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| The oceans contain _____ of the Earth's water supply. | 97%
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| The oceans __________ Earth's temperature by absorbing incoming solar radiation | moderate
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| ____ are smaller branches of the ocean. | seas
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| As water flows through rivers, it picks up small amounts of _____ _____ from the rocks and soil that flows into the oceans. | mineral salts
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| When ocean water _______ it leaves behind the salt. | evaporates
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| The two most abundant elements in the ocean water are ___ and ___. | sodium and chlorine
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| Water is made of these two elements. | Hydrogen and oxygen
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| The study of the oceans is called ___. | oceanography
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| Under water volcanic mountains are called __. | guyots
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| land from the continent's edge to ocean floor is | continental slope
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| narrow, very deep valleys in the ocean | trenches
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| flat, nearly level areas in the ocean | abyssal plains
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| valleys between ridges | rifts
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| The line which marks the edge of ocean water on land is called the | shoreline
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| Of what features do great underwater mountain ranges consist? | ridges
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| The above water portions of underwater mountains are | islands
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| The steps of the water cycle are | evaporation, condensation, precipitation
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| amount of dissolved salts in ocean water | salinity
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| affects the surface salinity of ocean water | evaporation and rain
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| refers to the amount of matter in a given volume of a substance | density
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| Which is more dense salt water or fresh water? | salt water
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| The top of a wave is the | crest
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| The bottom of a wave is the | trough
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| A measure from crest to crest or trough to trough is | wave length
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| A measure from the trough to the crest, straight up is the | wave height
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| Water mixed with air forms the | whitecap waves
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| This is air bubbles separated by a film of liquid | sea foam
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| ____ of all volcanic activity on Earth occurs in the ocean | 90%
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| Waves are a transfer of | energy
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| What causes waves? | Wind
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| Does water travel with the wave? | No
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| What two factors affect the size of waves? | How hard and how long the wind blows
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| Which tide is the highest? Spring or Neap | spring
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| These tides happen when the sun and moon form a right angle with the Earth. | Neap
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| Means self-contained underwater breathing apparatus | SCUBA
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| Divers keep their bodies warm by wearing | wet suits
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| The ______ helps keep a scuba diver from rising to the surface. | weight belt
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| The base of the food web | phytoplankton
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| Microscopic animals that eat phytoplankton | zooplankton
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| What is the largest ocean? | Pacific
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