The Water Cycle. Condensation takes place as the rising water vapor cools and is changed into liquid water, forming clouds.

Transcription

1 The Water Cycle Material Water often changes from its liquid form to its gaseous form and back to its liquid form in a process called the water cycle. The three main steps in the water cycle are evaporation, condensation, and precipitation. Evaporation is necessary to get the liquid water into its gaseous form of water vapor in the air. Condensation is needed to turn the vapor back to a liquid in the clouds. And precipitation returns the liquid water to the earth. Evaporation occurs as liquid water is heated and changed into water vapor. The water vapor is then carried up into the sky by rising air. Condensation takes place as the rising water vapor cools and is changed into liquid water, forming clouds. Precipitation happens as water droplets grow heavy and fall to the Earth as rain, snow, or sleet. Water is constantly moving back and forth from the air to the ground in the water cycle. 1

2 UStage U1 ocean heats up/ evaporation from plants U2 condensation/ to form clouds U3 clouds become full and drop rain U4 the rain water collects and runs off back into the sea UPre-reading activity Find the hidden word. 2

3 C W A T E R C W Y C L E H Z H N O R I D Z L O C E H O S Q I K O N L R M K N M B F R N P B E D I D N Y S S E O Q O G V N Z U F T E T I Z A G F K S M X N A A D A N N H T X Q Y Z V J N A M G Q R S Y F P F Q R A T G A S O N N O A M T S X U N B S J A G F P H P T Q O M N K N S T P G U A N H A I K E O H Q S R Y K H M F V P V O A F K H O K P T R H C E K G E N F L M P P X T A X R G J L X Z H V W P R E C I P I T A T I O N F R R O Q Z N A B W C M K V T F K CONDENSATION EVAPORATION PRECIPITATION RAIN RUNOFF SNOW The hidden word is: Water Cycle UWhile reading activity: A- Circle the correct answer: 1. The Water Cycle has no beginning and no end. 3

4 True False 2. When the sun shines on the sea warm air rises and forms water vapor. True False 3. Clouds are made of water droplets. True False 4. When clouds are full of water droplets they fall as rain, or snow. True False 5. The rain falls on to the land and stays there. True False B- How does the water in the ocean become clouds? Explain As the rising water vapor cools and is changed into liquid water, forming clouds. C- What am I? Choose a word from the word box below that answers each question: a. condensation b. evaporation c. precipitation d. runoff 4

5 1. b. I am the changing of a liquid into a gas. What am I? 2. a. I am the changing of a gas into a liquid as the gas cools. What am I? 3. c. I fall to Earth's surface as rain or snow. What am I? 4. d. I am precipitation that flows over the land's surface into rivers and lakes and is not absorbed into the ground. What am I? D- Match the letters above with the diagram of water cycle below. a. b. c. d. UAfter reading activity: UWater drop diary/story 5

6 Word List: condensation precipitation evaporation water source, wind, run off Imagine you are a water drop and describe what happens to you in the water cycle using the words above: Stage Sun heats up the ocean.(evaporation) Hi, my name is Drizzle the water drop. Here is the story of my trip through the Water cycle. One day, my friends and I were relaxing on the surface of a lake enjoying the sun when all of the sudden I started feeling warmer than usual. I kept getting hotter until I got so hot I spread myself out into a gas form and rose higher and higher in the air my friends gliding along right beside me. As one other drop once told me, this is called Uevaporation Uand we are now water vapor Form clouds ( condensation) When we got so high that I felt as if I could touch the stars, I started feeling cold again as if I was in my pond except I was still high up in the air. I was reforming back to my original form as a droplet (This isu condensationu). After days and nights of waiting, a cloud did us all a favor it burst! WHOOSH I was swept away by the UwindU away from them. I knew that there would be no more days of playing together but I decided that it was just part of nature. 6

7 4 As I was drifting through the air by Uprecipitation U- I was wondering where I would land. Well, truly I didn t really care where I landed I just wanted to land and Urun off 5 I soon touched the surface of a fast flowing river, ahhh it felt good to be with other drops again. But I knew it will not be for long. Here is the end of my story but I know it does not end here it keeps going on and on and on an endless cycle of water.. 7