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water
prperties/composition/currents
| Question | Answer |
|---|---|
| what is in water | hydrogen and oxygen |
| why does ice stay on the surface of a lake | ice has the same density as water |
| what is cohesion | the attraction amoung molecules that are alike |
| what is adhesion | the attraction amoung molecules that are not alike |
| what is density | the mass per unit volume of material |
| what is brackish water | water that is a mixture between salty water and freshwater |
| what is the saltiest ocean | the atlantic ocean |
| why do we use salt on the roads to melt ice | salt helps to trap heat and it makes it warmer and lowers the freezing point of water |
| what stirs the upper layer of the sea | surface circulation |
| what stirs the lower layer of the sea | deep circulation |
| what happens to the salt on an iceburg | salt stays in the ocean and leaves the iceburg as freshwater |
| what happens to sea water colder and saltier | its density increases and starts to sink |
| how do ice burgs form in the ocean | when salt water freezes the salt gets left behind and forms an iceburg with freshwater |
| why do iceburgs float in the ocean | they float because water as a soild is less dense than as a liquid and it has billions of air bubbles in it |
| where did the salt in the ocean come from | the salt in the ocean came from the salt on the land |
| where does the salt do when water evaporates | the salt gets left behind |
| what are currents | cohesive streams of sea water caused by wind,gravity, and density |
| how many gyres are there in the world | 5 |
| where are each of the gyres | 2 in the atlantic ocean, 2 in the pacific ocean, and 1 in the indian ocean |
| what current goes through the place where the titanic sank | the labrador current |
| where is the labrador current | near greenland |
| what are the 5 gyres steared by | the continents, wind, and gravity |
| what type of currents are their | surface currents and deep currents |
| why do currents move the way they do | wind and the coriolos effect |