Fazana
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| Joined: 21 Feb 2009 |
| Total Posts: 28722 |
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| 29 Nov 2016 07:51 PM |
the other 30% of me wants2die
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| 29 Nov 2016 07:55 PM |
The water cycle is also called the hydrologic cycle. Basically, it involves three steps: water collected in an ocean or other source evaporates into the air and becomes clouds; the water then gathers together to become heavy enough to fall as rain. The rainwater eventually collects in pools of water which evaporate again. This is a cycle, so it always continues - water never stops moving, although later you'll learn how old your drinking water may be. The "first" step in the water cycle is when water in oceans, lakes, or other bodies/collections of water is warmed up by the Sun. Heat adds energy to matter. This causes the molecules in the water to move faster and farther apart, until they move so far apart that they become a gas instead of a liquid - the water becomes water vapour. Eventually the water vapour condenses into clouds. This means that the particles in the water vapour slow down and cool off, resulting in them becoming water droplets. These water droplets group together to form clouds. This is why a parachutist unfortunate enough to fall through a cloud would end up covered in water droplets. When enough water droplets (remember, these are usually very small to begin with) form 'inside' clouds, they become heavy enough to fall towards the Earth. This is usually observed as rain, but Precipitation can also occur as snow, hail, sleet, etc., depending on temperatures and humidity. Runoff is when water travels across land. Rain will land in the ground, streets, oceans, and in streams and rivers. Eventually it makes its way to a body of water (not necessarily an ocean, these can be streams, puddles, even a glass of water you leave outside). After a while, the water is evaporated and the water cycle repeats. One thing that many people don't realise is how old water is. Scientists agree that matter (usually) cannot be created or destroyed. So essentially, the water you drink today has been in the water cycle for a very long time. In fact, it's thought that a water molecule can spend 3,200 years in an ocean before repeating through the water cycle and up to 10,000 years for water stored in caves deep underground. |
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LulMeLul1
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| Joined: 30 Jun 2010 |
| Total Posts: 51640 |
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| 29 Nov 2016 07:56 PM |
| Are you NA? Because you're sodium fine. |
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Paniked
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| Joined: 25 Mar 2016 |
| Total Posts: 9347 |
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| 29 Nov 2016 08:03 PM |
90% of me is carbon dioxide
oh wai-
*goes offline*
you still got frisked |
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