How are tides caused ?

The tides are caused by the gravitational attraction of the sun and the moon.
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How do currents affect the temperature? How does it affect the temperature of coastal areas in the N.W. Europe ?

Currents affect the temperature directly. The warm currents raise and the cold currents lower the temperature of the neighbouring islands. The winds blowing over the cold current carry low temperature and have a cooling effect. Wind blowing over warm currents have a warming effect and raise the winter temperature of regions situated in higher latitudes.


The North-West Europe's coast remains open due to the Gulf Stream (warm current) and has an ideal climate due to the moderating effect of North Atlantic Drift.
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What are tides ? 

The periodical rise and fall of sea water once or twice a day is called tides.
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Where do waves in the ocean get their energy from ? 


The waves get the energy from the wind.
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What are waves? 

Waves are oscillatory movements in water where particles moves in a vertical plane up and down.
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