Why doesnt the sea dry up??

Question

Why doesnt the sea dry up??

Answer 1

Water vapour constantly evaporates from the seas and oceans (Trees and plants also transpire water vapour) but stays in the atmosphere for only a short time, 10-14 days at the most.

The reason for this is that it condenses and falls as rain, snow or even forms dew in the early morning. Air higher in the atmosphere is colder than the air lower down and as the water vapour rises it condenses back into water droplets and falls back to earth.

You can see the effect of a warmer/cooler atmosphere on a small scale in a bathroom full of steam from a hot bath, as the water cools it condenses onto surfaces. Gravity then pulls it downwards, often forming puddles on horizontal surfaces. When the bathroom returns to its normal temperature, or a window is opened there's no more steam, the water vapour has returned to a water state.

Clouds in the sky are formed by the water vapour condensing into tiny droplets, often forming around very tiny particles of dust. When so much water has condensed the clouds cannot hold it any more and it falls back to earth or onto the oceans. Rivers are always carrying the water that’s fallen on land back to the oceans.

We get thunderstorms, for example, in hot weather because warmer air holds more water vapour and warm air rises, the vapour condenses when it meets colder air higher in the atmosphere, a lot of water vapour suddenly condenses and is released in a sudden downpour of heavy rain. The energy accumulated and released also causes thunder and lighting.

The total amount of water the atmosphere depends on how warm the entire atmosphere can hold (this is known as its absolute humidity). The warmer it is the more it can hold.

It’s thought that during the last Ice Age the few humans around then were confined to certain areas of the planet, not just because of the cold but because much of the fresh water was frozen as well. A cold atmosphere also meant little precipitation. It was a cold drought essentially. Because temperatures dropped the atmosphere couldn’t hold much water and water on the surface froze. The humans had to stay in areas warm enough for water to be found that wasn’t frozen.

Answer 2

the water from the ocean evaporates and goes into the sky to make clouds that rains and it goes back into the ocean. plus the ocean has alot of water plus the waten in the world. its alot to imagine.

Answer 3

And where would the water go?

Answer 4

because God is always crying (rain) cause by mankind's sins.

Answer 5

its called The Hydrologic Cycle

Answer 6

because after evaporation it rains again.

Answer 7

Cos it never stops raining.

Answer 8

The atmosphere and the oceans could evaporate into space and be blown away by the solar wind, the earths' magnetic field deflects the solar wind and keeps this from happening.

Answer 9

rain.

Answer 10

You do realise how much water there is in the world don't you? Seas/oceans contain a h**l of a lot of water - too much for evaporation to completely dry them out. Although water in the seas does evaporate, the water is contantly being replaced by water that runs into them from the rivers or from rain, thus making it extrememly difficult for the sea/oceans to evaporate/dry out completely.

Answer 11

The water in the sea evaporates (turns into a gas), and becomes clouds. The clouds turn into rain and deposit the liquid water back into the sea.

Answer 12

all the urinating swimmers keep it wet

Answer 13

thank god it doesn't life as you know it depends entirely on it?

Answer 14

the reason is something called the water cycle

water cycle:

The Earth's water is always in movement, and the water cycle, also known as the hydrologic cycle, describes the continuous movement of water on, above, and below the surface of the Earth. Since the water cycle is truly a "cycle," there is no beginning or end. Water can change states among liquid, vapor, and ice at various places in the water cycle,  the balance of water on Earth remains fairly constant over time