上海牛津7Bwaterfestival公开课课件.pptx

1、The three forms of water Who am I?I have no smell,no colour.Nothing can cut me.If you wash me more,I will be dirtier.Yeah!I am water!Water Quiz1)How much of the water on earth is available(可利用的）to drink?A.95%B.26%C.1%2)How much of your body is made up of water?A.75%B.25%C.6%3)How much water should y

2、ou drink daily for good health?A.1-2 glasses B.3-4 glasses C.6-8 glasses4)A hundred years ago,earth had_.A.much more water than there is now B.a lot less water than there is now C.the same amount there is now5)How long could you live without water?A.About three months B.About seven days C.About one

3、day6)Water that is safe to drink is called_.A.clean B.polluted C.drinkablewatericesteam 7)How many forms does water have?turn into转变成转变成形态；形式形态；形式fr_ _zemelt_ _ _ _bil meltb o i le eLook and match:freezemeltboilcool down冷却冷却A.freeze B.melt C.cool down D.boilListen and fill in the blanks What _ when

4、water boils?When water _,it turns into _.What happens _ water freezes?When water _,it turns _ ice.What happens when ice melts?When water melts,it turns into _.What happens when steam _ down?When _ cools down,it _ _ water.happensintofreezeswhenboilssteamwatercoolssteamturns intoWhen.,it turns into.Th

5、e three forms of waterA:What happens when?B:When,it turns into.boils freezesmeltscools downLook and sayWhen,it.Group Competition:What happens when water boils?When water boils,it turns into steam.What happens when ice melts?When ice melts,it turns into water.Drops of water.Put a dry lid on a glass o

6、f hot water.Wait for 10 seconds(秒).Take the lid off.What can you see under the lid?What happens when water freezes?When water freezes,it turns into ice.Drops of water.The steam in the air turns into water on the cold glass.Put some ice cubes in a glass of water.Wait for 2 minutes.Look at the outside

7、 of the glass.What is on the glass?How does it happen?What happens when steam cools down?When steam cools down,it turns into water.WaterWater has three f_,they are s_,ice and water.When water b_,it turns into steam.When water f_,it turns into ice.When ice m_,it turns into water.When steam c_ d_,it t

8、urns into water,too.If you put a dry lid on a glass of hot water,and wait for ten seconds,then t_ the lid o_,youll find drops of water on the lid.Thats because the hot water in the glass t_ i_ steam and the steam turns into drops of water on the lid.If you put some ice cubes in a glass of water and

9、wait for two minutes,then look at the o_ of the glass,youll find d_ of water on the glass,too.Thats because the steam in the air turns into water on the c_ glass.All living things need water to live.People can live s_ weeks without food,but only a few days w_ water.We should drink 6-8 g_ of water ea

10、ch day!Without water,the earth would look like the moon.How terrible it would be if there were n_ water!ormsteamoilsreezeseltsoolsownakeffurns ntoutsideropsoldeveralithoutlassesoRead and fill in the blanks:Water is important.We should try our best to save it!What happens when water boils?when water

11、freezes?when ice melts?when steam cools down?When,it turns into _.form n.形态；形式形态；形式 melt v.融化融化 boil v.煮沸煮沸 freeze v.（使冻结，结冰）（使冻结，结冰）(froze-frozen)cool down 变凉；冷却下来变凉；冷却下来turn into 转变成；将转变成；将变成变成 Make a summaryAssignment:Oral work:Read the text after the recording at least 3 times.Written work:1.Copy the new words and phrases.2.Find out the uses of water,steam and ice and try to write at least 50 words on the topic Water/Steam/ice You can use the sentences:1)When it turns into 2)We use to 3.)If there is no