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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 |