about properties of water,composition of ocean, and ocean currents
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| true or false. wind and currents move in opposite directions. | false, they move in the same direction.
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| can surface currents carry warm or cold water? | surface currents can carry both along the ocean.
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| what influences the direction currents move? | prevailing winds.
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| what is a gyre? | a circular system of currents.
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| what direction do gyres spin in the northern hemisphere? | clockwise. The southern spins counterclockwise.
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| why do gyres spin in different directions? | Because of the Coriolis Effect (earths rotation.)
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| can currents move vertical or only horizontally? | currents can do both- horizontal because of upwelling and density currents.
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| what is the great ocean conveyer belt? | large system of ocean currents that affects weather and climate. (like gyres)
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| water molicules stick together well because of _______ | cohesion.
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| what temperature is water highest density? | 4*C
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| why is water a solvent? | because it can mix with many other substances.
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| what is polarity? | is a condition where opposite ends of a molecule have a little bit of opposite charges, but the overall charge of the molecule is neutral.
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| does ice expand or contract as a solid | it expands unlike most solids.
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| how can water be found on earth that makes it special. | it can be found as all three states (gas, liquid, solid.)
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| what is adhesion? | the attraction among molecules that are NOT alike
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| what is water atom composition made of. | 2 slightly negative hydrogen
one slightly positive oxygen
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| what is the sea floor like? | large mountains and vallies and also plains. Active volcanoes that will create more land someday. it is very dark with animals that create their own light.
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| what made the ocean salty? | minerals that formed salt carried into rivers/ streams into ocean basins.
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| what covers the abyssal plains? | thick layers of sediment.
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| what are abyssal plains? | large and flat areas on the sea floor.
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| where is brackish water? | where a sea or ocean (salty) meets a stream or river (fresh water.)
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| what are submersible? | an under water vessel that can go great depths to explore the ocean floor and stand the pressure.
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| who uses submersibles? | scientist to learn about ocean floor
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| about when did oceans start to form | as early as 4 billion years ago
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