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Stack #1796006
Question | Answer |
---|---|
why does water have unusual properties? | because of it molecules |
what 2 kinds of atoms make up water? | one oxygen and two hydrogen atoms |
what is the overall charge of a water molecule? | a neutral charge |
why is water called a universal solvent? | because so many substances can dissolve in it |
what is cohesion? | the attraction of molecules that are alike or the same |
what is adhesion? | the attraction of molecules that are different |
why do icebergs float? | the icebergs are mostly made up of freshwater and have no salt so it would be less dense |
why is the density of ice less than water? | in ice the molecules are more spread apart so the density is less because in water their closer together |
what are wind driven currents called? | surface currents |
what is one major wind belt? | prevailing winds |
how do surface currents form? | the friction made from wind and water can move the water. the air particles drag the water and makes the water move |
what is the Coriolis effect? | the movement of the water caused by earths rotation |
which way does surface currents carry water? | horizontally |
what is a gyre? | a circular system of currents |
which way does upwelling currents carry water? | vertically |
which direction does a density current move? | downward |
what does the density of water depend on? | the amount of salt |
what is salinity? | the amount of salt ions making the sea salty |
how does the water become salty? | the water washed over rocks and carried it to the ocean |
why does the salinity not increase overtime? | while salts are added their also being removed |
what is something that water absorbs? | light |
what is usually the temperature of the bottom layer of the ocean? | near freezing |
what causes water to become more dense? | salinity and cold temperatures |
how many layers can the ocean be divided into? | three layers |