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Cindy McShea

on 22 January 2014

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Transcript of THE WATER CYCLE

The sun is the main source of energy on earth. The sun gives us energy in the form of heat. The sun heats the earth through a proses called radiation. This sun is also the start of the water cycle. The suns job in the water cycle is to evaporate and transpirate water. Evaporation is when the sun heats a body of water, then the water turns into a gas called vapor. Transpiration is when the sun evaporates the water inside of something living, like a person, animal, or plant. This is why we get dehydrated if were out in the sun to long.

click play to see evaporation and transpiration up close and personal.
click play to watch a video describing condensation .
press play to watch a video about precipitation.
The next step in the water cycle is run-off. Run-off is water from precipitation that flows across the land. Run- off can be a hazard for our safety and health. One reason run-off is dangerous is that run-off picks up pollution, animal waste, parasites, oil, harmful chemicals, etc. in the posses. Run off can cause erosion such as land slides witch are very harmful if you live on or near a mountain. Another way run-off can be dangerous is that run off can cause flooding if there was allot of precipitation in one spot. Run-off may seem all harmful but run-off benefits us too , for instance run-off puts some water in the soil for plants.
press play to watch a
video to help you better
under stand run-off.
The last step in the water cycle is collection. Collection is when run-off finely is collected in a body of water or in the ground. The water that is collected in soil (ground) is sucked up by plants or humans use it. We can use this by getting it out of a well or pumping it directly out of the ground, we use this as drinking water, to water plants, to bath in, to clean our homes, washing close,cook with it, etc. The water that doesn't get collected in the soil ends up in a body of water such as a lake, pond, river, the ocean,etc. we use this water by swimming in it, or bath in it, or drink it, brush are teeth with it, and many many more. Wild life also uses this water ,some animals live in this water and others drink it or hunt in it. Some times the water gets collected in a rain barrel witch this water is commonly used for gardening. Unfortunately water sometimes gets collected in buildings, aspecialie when they are in flood plains, crab tree valley mall is one example. Like i said before collection is the last step in the water cycle, but not really because after collection the water cycle starts all over again when the water get evaporated or transpirated again. Most people think that the world has a limited amount of water, witch they are right but as long as the water cycle keeps recycling the water we'll be just fine.

By: Lauren
The next step in the water cycle is called condensation. Condensation is when water vapor rises up, cools down, and turns back into its liquid state because its molecules are cold and moving slower. Once the water is back in its liquid state the water molecules come together or condense. The molecules condense because the molecules in liquid are less spread than the molecules in gas. This is how clouds are formed. A way that I remember condensation is that the molecules are cold so they are huddling like penguins.
Step three in the water cycle is precipitation. Precipitation is when the water evaporated or transpirated that is now in a cloud falls back to earth in a form of water. This water can come down as rain, hail, snow, sleet, or freezing rain. Precipitation happens when a cloud is holding so many water molecules that they are to heavy so they fall back to earth. When they fall, since the molecules are so high up in the atmosphere they freeze. But as they get closer to the earths surface the air tempoture is warmer and the molecules melt back into water before they hits the ground. Sometimes the air tempoture is below freezing(below 32 f) when this happens snow falls down. A precipitant called sleet is a mix between snow and rain. Sleet happens when its not quite cold enough to snow but close in other words the snow hasn't melted back into rain. Hail are balls of ice that precipitate. hail can be as small as your pinky nail or as big as an apple. Hail can be dangerous depending on its size, a descent size can brake a wind shield or knock you out. Freezing rain is yet anther type of precipitation, it is rain that freezes instantly as it hits a surface, freezing rain makes driving and many other outside activity's dangerous. Like all the other jobs in the water cycle with out precipitation there would be no water cycle or any life on earth.
third step

forth step

last step

press play to watch a swawesome rap about the water cycle.
This is a diagram of the water cycle.
This is another diagram of the water cycle that Lindsay and me made on Microsoft.
crab tree valley mall (macys)
ground water monitoring well
BY:Lauren Mcshea
Full transcript