Water talk

1. Water talk Without her ,can you survive ? Treasure natural resources Save water

2. Water all around us. Water has no taste at all. Water has no smell. Water’s in the waterfall, The pump, The tap, The well. Water’s everywhere around us. Water’s in the rain, In the bath and in the pond,, And in the sea again.

3. What do we use water to do at home? to make drinks to wash hands to wash dishes to clean our teeth to cook rice to wash clothes

4. What do we use water to do at work? to make electricity to put out fires to water flowers to water trees to make things in factories

5. How does water come to our homes? pipes a reservoir our taps a special factory

6. Where does rain come from? 2 The water makes clouds. 3 The wind blows the clouds to the land. 4. It rains 1 Water comes from the sea

7. Pair work A:How can we save water? B:We can save water by fixing dripping taps. (turn a dripping tap off, take a shower instead of a bath) A:How can we save water? B:We can save water by not brushing our teeth under a running tap.We can use a mug instead. (wash the dishes, wash vegetables, waste water for playing games

8. Listening :fill in the blanks element Water is a kind of natural ________, it is very important to us. We cannot live without it. And water is also called “ the liquid ______” because it is much more_________ than it. There is much water on the earth, but we cannot use most of it. About 97.4% of the earth’s water is _____ . Most of the fresh water is snow and ice near the North and South Poles. We can use only about one ________ of the water on the earth. We use water from both lakes and rivers and so on. Water can help us do a lot of things. It is very useful, it is our good “________”. Yet if we don’t use it well, it also can be very __________ .So we human beings must make good use of it. Can you ________ what the world will be like without water? valuable gold salty percent servant dangerous imagine

9. The story in Chapter 6 you are going to read about something that is more valuable than gold—water. Without water, we can’t live. Do you know the questions about water? a 1. How long could you live without water?( ) a. A few days b. A few weeks c. A few hours People can live without food for more than a month, but they can’t live without water for more than a week. Losing more than 20% of the normal water content of our bodies will result in a painful death.

10. 2 How many liters of water does you body need daily?( ) a a. Two b. Four c. Eight About 65-70% of our bodies are water, s so it is important for us to drink a lot o of water. Each day, a normal person wi will drink about 2.4 liters of water or ot other drinks. In America , the average person will use 260 liters of water a day and on average, each person will drink 60,600 liters of water in his/her life. 3. What’s the amount of water do you need when you exercise ?( ) a a. Increases b. Remains the same c. Decreases You need more water during and after exercise because you lose water by sweating and you need to replace the water that is lost.

11. 4.what does water become when you freeze it?( ) b a. Liquid b. Solid c. Gas Water freezes at 0℃.When it freezes, it changes into ice.Water boils at 100 ℃ when it changes its form into a gas, becoming steam. 5.How much of the earth is covered by water? ( ) c a. One third b. A half c. Two thirds Water covers 70% of the earth’s surface ,but only about 3% is fresh water. All the rest is salt water .Of this 3%,less than 1% is in the form of lakes or rivers .The remaining 2% is frozen in glaciers（冰川 ）at the North and South poles a 6.What is the scientific symbol for water?( ) a.H2O b. HO2 c. H2O2 H stands for hydrogen（氢） and O stands for oxygen .The symbol means that each water molecule （分子）consists of two atoms （原子）of hydrogen and one atom of oxygen.

12. Look and think ( ) It flows to the sea. ( ) It runs into stream and rivers. ( ) It rises from the sea to the sky. ( ) Water falls from the clouds as rain. ( ) It falls as rain again. 3 2 4 1 5

13. New words increase/In’krI:s/v.增加 -to become or make greater in number, quantity or size e.g. She increased her speed to overtake the lorry反义：reduce/decrease decrease/dI’krI:s/v.降低、减少-to become smaller or fewer e.g. Profits have decreased by 15%. remain/rI’meIn/v.保持-to continue to be e.g. They remained silent throughout the trial（审讯）.

14. freeze / frI:z/ v. (froze、frozen)愣住；结冰-to change or be changed from liquid to solid by extreme cold e.g. The lake was frozen over. freezing adj. 冻结的；极冷的frozen adj. 冰冻的反义melt liquid/’lIkwId/n.液体-a substance that flows freely such has a water or oil.e.g. Water is a liquid. solid/’sClId/n.固体-a substance that is neither liquid or gas e.g. He can’t eat solid food because of his illness.

15. scientific /,saIEn’tIfIc/ n.科学的-used in or involved in science e.g. We should look at the matter from the scientific point of view .我们应该以科学的角度看待这件事。scientist n. 科学家 science n. 科学 scientifically adj.科学地 symbol/’sImbEl/n.标志；象征 -emblem e.g White is the symbol of purity. symbolize v.作为…的符号，象征 symbolic adj. 符号的 symbolical adj. 象征的；用作符号的

16. Language items • rise from …to … • e.g. The sun rise from the east to the west. • 2. fall from …as …. • e.g. Water fall from the clouds as rain. as (作为) prep.

17. Group discussion How do we save water in our daily life?

18. Assignment : 1.Write at least 80 words on the topic “Water,the liquid gold” 2.Preview the text on Page 75 3.Copy the new words and some phrases