Water Cycle

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2/24/2010 1 Contribution by Golbarg Farbood grade seven student at St Maria Goretti School in Inglewood , Australia

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2/24/2010 2 You may think the water cycle is very complicated, but it’s not. Once you really think about it, it’s quite simple. Every living thing needs water, which is why the ‘water cycle’ is so important. Introduction

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2/24/2010 3 What Happens? Water never stops moving. Snow and rain fall to the earth from clouds. The rain and melted snow run downhill into rivers and lakes, sometimes crashing over waterfalls. Eventually the water flows into the ocean. During evaporation, the water turns from liquid into gas, and moves from oceans and lakes into the atmosphere where it forms clouds.

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2/24/2010 4 The earth has only a limited amount of water.  That water keeps going around in a cycle. This is the Water Cycle. This cycle is made up of four main parts: evaporation condensation precipitation collection A Little Easier to Understand

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2/24/2010 5 What are: Evaporation Condensation Precipitation Collection

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2/24/2010 6 . Evaporation:   Evaporation is when the sun heats up water in rivers or the ocean and turns it into vapor or steam. The water vapor or steam leaves the river or ocean and goes into the air. Transpiration is basically the same thing, except the water is drawn from the leaves of trees.

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2/24/2010 7 Condensation:    Water vapor in the air gets cold and changes back into liquid, making clouds. This is called condensation.

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2/24/2010 8 Precipitation:  The process of precipitation is when so much water has condensed that the air can’t hold it anymore.  The clouds get heavy and water falls back down to earth in the form of rain, hail, sleet or snow.

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2/24/2010 9 Collection:  When water falls back to earth like in precipitation, it may fall back in to oceans, or rivers or it may end up on land.  When it ends up on land, it will soak into the earth and become part of the “ground water” that plants and animals drink or it may run over the soil and collect in the oceans or rivers where the cycle starts all over again!

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2/24/2010 10 Conclusion People use water in many different ways, we need it to survive, and if it wasn’t for the water cycle cycling through we probably wouldn’t exist. In conclusion I would like to say that we need the water cycle very very much. I would like to thank you for viewing my project!

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2/24/2010 11 References The websites I used to gather information were: www.enchantedlearning.com/subjects/astronomy/ planets/earth/Watercycle…. www.epa.gov/safewater/kids/cycle.html www.kidzone.ws/water encarta.msn.com/find/concise.asp?ti=761554737 www-k12.atmos.washington.edu/k12/pilot/water_ cycle/grabber2.html mbgnet.mobot.org/fresh/cycle

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2/24/2010 12 Did You Know ? Did you know that the water cycle is also known as the hydraulic cycle? Did you know that around 70% of the Earth is water and that 97% of that water comes from the sea? Did you know there is about the same amount of water now than there was when the dinosaurs were around? Did you know only about 3% of the Earth’s water is fresh, and most of it is in glaciers and ice caps which leaves only about 1% for humans and animals?