必修三模塊四 Sandstorms in Asia學案

7. a ________(化學) change takes place in any substance when it burns.
8. as chinese ________(公民), we should try our best to improve the environment.
9. under the _________(保護) of the sun glasses, our eyes won’t hurt in the strong light of the sun.
10. his suggestions are _________ (完全地) reasonable.
3. do all the activities about vocabulary in the textbook, including the ones in the workbook. for example: p31, activity 1&2; p33,activity 2&3; p35, activity 1; p86 activity 6,7 &8.
period 2  speaking（introduction,pronunciation,speaking1&2）
step1 talk about the following pictures in your own words. (show them the pictures of sandstorms. )
     
for example:
s1: in the first picture i can see a man is riding a bike hard. the sky is yellow.
t: can you see the buildings clearly?
s1: no, they are not clear.
t: thank you, sit down please.
s2: in the second one i can find some buildings, but i cannot see them clearly. may be the city is in the sand or anything like that.
s3: in the third one i can see a very tall building only. there is much sand in the sky.
t: very good. thank you.
s4: in the next picture, i can see many people riding bikes wearing masks. the weather is very cold, because they wear gloves and more clothes.
t: how about the air? is it clean?
s4: the air is not clean. there is something like sand in the air.
t: quite right!
s5: in the fifth picture, there is a strong wind carrying sand. it looks like smoke.
s6: in the last one, there are some buildings covered with thick, yellow dust.
t: excellent job! thank you every much. now, who can tell us why there is so much sand in the sky? the wind that carry sand are called…
s7: sandstorm.
t: very good. yes, they are called sandstorm. if you want to know more about sandstorm, let’s come to module 4 sandstorms in asia.
step ii warming up
t: open your books on page 31. look at the picture in your books, what can you see in the picture?
s1: there is a strong wind carrying sand in the sky, and a car covered with sand running slowly.
t: right. now, complete the sentences using the correct form of words in the box. three minutes.
answers: sandstorm, lasts, frightening, blows, buried,

after 3 minutes, ask some students to share their answers.
t: from this short paragraph, we can see the sandstorm is frightening. have you ever experienced the sandstorm? how does it be created? before we discuss these questions, let’s look at some words on the screen.
dig, earthquake, protect, sign, the pacific ocean