牛津版上海版八年级下册Unit2Water教案
U2 Water
The first period
Teaching aims：
Introduce the topic water. Ask students to work in pairs for a few minutes, and to write down anything they know about water. Ask 3 students to tell their answers and write them down on the black board. Then discuss their ideas briefly and do the exercises. Teaching Important Points :
Try to know something about water
Teaching Procedures:
1: A Free Talk
What do you know about water
* People can live without food for more than a month, but they can ' t live without water for more than week. Losing more than 20% of the normal water content of our bodies will result in a painful death.
*About 65-70% of our bodies are water, so it is important for us to drink a lot of water. Each day, a normal person will drink about 2.4 liters of water or 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.
*Some people believe that our emotions and mental stability are affected when there is a full moon because the gravitational pull of the moon affects the water in our bodies in the same way as it affects the ocean tides. Legends say that werewolves appear when there is a full moon.
*You need more water during and after exercise because you lose water by sweating and you need to replace the water that is lost.
*Water freezes at 0°C (32 T ). When it freezes, it changes into ice. Water boils at 100C (212 T ) when it changes its form into a gas, becoming steam.
2: Look and think
* Choose the write answer
1 You could live without water for a few ____ .
a days
b weeks
c hours
2 Your body needs about ____ liters of water daily.
a two
b four
c eight
3 When you exercise, the amount of water you need ____ .
a increases
b decreases
c remains the same
4 When you freeze water, it becomes a ______ .
a liquid
b solid
c gas
5 About ______ of the earth is covered by water.
a one third
b one half
c two thirds
6 The scientific symbol for water is _______ .
a H2O
b HO2
c H2O2
* Use the picture to put these sentences in the correct order.
( ) It flows to the sea.
( ) It runs into streams and rivers.
( ) It rises from the sea to the sky.
( ) Water falls from the clouds as rain.
( ) It falls as rain again.
Homework:
Preview the text: Water talk
The second period
Teaching aims:
1 Try to understand the whole lesson and read it fluently. The tone and pronunciation
should be basically right.
2 Learn the new words and phrases.
Teaching aids:
Multimedia equipment
Teaching Important Points :
How to understand the test completely .
Teaching Difficult Points : Teaching Procedures:
1: A Free talk
(Ask two Ss to talk about some measures we use to save water and say the following.) T: Very good . Thank you for your performance.
We have learnt that water is very important and we don ' t have enough water in the world. If we don ' t have wateryinlifeo,utrhdeasilituation
will be terrible and we all will die. Some people in other places are suffering from lack of water, such as African people. We should treat every drop of water seriously and should no waster even a drop of water.
Show the text on the screen then give brief introduction to the students and then let Ss read the new text after the recording .
2: learn some new words.
1 brush n. 刷子，毛刷
v. 刷，擦，拂拭We brush our teeth with a toothbrush everyday.
2 pour v. 灌注，倾泻，涌入，流，倾盆大雨
pour oil on the fire 火上加油Tears poured from her eyes.
People poured into he hall.
Please pour me a cup of tea.
At 5 o ' clock workers peodurout of the factories.
It was pouring.
3 sink n. 水槽
I left the soap by the side of the sink.
v.使…下沉
The ship is sinking.
4 vanish v. 消失
Forests are vanishing from our land.
5 drain n. 排水管
Your kitchen drain has become blocked by tea leaves.
v. 排去
The water drained away slowly.
6 freeze v. （使）结冰，凝固
The terrible news froze my blood.
freezing adj. 极冷的frozen adj. 冻结的frozen food
7 impatient adj. 不耐烦的，没耐心的opp. patient 有耐心的
I ' m getting impatient because I ' ve waited for an hour.
patience n. 耐心，容忍
I have no patience with him again.pouring
8 obey v. 服从，顺从，听话
They refused to obey (the order).
9 faint adj. 微弱的
Did you hear the faint moan just now?
10 float adj. 漂浮，飘浮Wood floats on water.
11 comfortably adv. 舒适的，舒服的
comfortable adj. 安乐的，舒适的
comfort n. 慰藉，安乐
I feel very comfortable in this chair. The lovely baby was a comfort to her.

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