Chapter2《Pollution Fighters》课件1(27页)(牛津上海八年级下)
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Chapter Two
Pollution Fighters
Look and Think
What good are trees?
We get shade from trees.
We get_b_e_t_te_r_c_i_ti_e_sfrom trees.
We get _w_o_o_d_e_n__h_o_u_s_es_from trees.
No. they are only now beginning to understand them.
Answer the questions
5. Can trees really communicate with one another? Yes. For example, if insects attack a tree, it can warm its neighbors.
Answer the questions
1. We get some useful things from trees, don’t we? Yes. Two examples are wood and rubber.
2. Is it true that trees do two main things to the air? Yes. They cool it and clean it.
2. pure a. not mixed with other things b. not c. comfortable 4. running a. traveling b. working c. playing 6. hardly any a. quite a lot b. almost none c. a large number
We get __f_u_r_n_it_u_re__from trees.
We get _p_a_p_er_from trees.
We get _p_e_n_c_il_s_from trees.
We get _c_o_k_e_from trees.
We get c_o_f_f_ee__b_e_a_n_sfrom trees.
• b treoises
iii 40 years
• d whales
iv 4000 years
• e people
v 3 years
What does the word mean?
1 1.suppose a. know b. think it is true c.ask 3. release a. bring in b. take away c. let out 5. communicating with a. attacking b. sending message/ signals to c. joining
6. And can they really protect themselves from insects? Yes. They can produce a chemical that makes their leaves taste nasty.
7. Can trees help one another? Yes. For example. They can join their roots together underground and pass food and water around.
8. Is it true that, every year, there are fewer and fewer trees in the world? Yes. The reason is that people cut down millions of trees, but replace hardly any of them.
We get __fr_u_i_ts_from trees.
What do you know about…?
How long do they live?Match the items on the
left with the average ages on the right.
• a mice
i 70 years
dangerous or may happens
Find the facts
Trees:
1. live much longer than people; T 2. produce rubber, wood, paper, nuts, beans and fruit; T 3. rtealekaese oxygen from the air; F 4. hceoaotl the air; F 5. are like air conditioners; T 6. ccaannnot protect themselves against insects; F 7. can share food and water with one another; T 8. are in danger, mainly from ipnesoepclet/sh;umans F
3. I’ve heard that one tree has the power of 15 air conditioners. Is that right? No. One trees has the power of five air conditioners.
4. Scientists know a lot about trees, don’t they?
Do you know the meaning?
1. sip 2. nature 3. oxygen 4. hectares 5. warn 6. a chemical 7. nasty
a. made by nature, not by man b. unpleasant c. drink in small amounts d. a life-giving gas found in air e. something produced by chemistry f. areas of 10000 square meters g. gay that something bad or
Pollution Fighters
Look and Think
What good are trees?
We get shade from trees.
We get_b_e_t_te_r_c_i_ti_e_sfrom trees.
We get _w_o_o_d_e_n__h_o_u_s_es_from trees.
No. they are only now beginning to understand them.
Answer the questions
5. Can trees really communicate with one another? Yes. For example, if insects attack a tree, it can warm its neighbors.
Answer the questions
1. We get some useful things from trees, don’t we? Yes. Two examples are wood and rubber.
2. Is it true that trees do two main things to the air? Yes. They cool it and clean it.
2. pure a. not mixed with other things b. not c. comfortable 4. running a. traveling b. working c. playing 6. hardly any a. quite a lot b. almost none c. a large number
We get __f_u_r_n_it_u_re__from trees.
We get _p_a_p_er_from trees.
We get _p_e_n_c_il_s_from trees.
We get _c_o_k_e_from trees.
We get c_o_f_f_ee__b_e_a_n_sfrom trees.
• b treoises
iii 40 years
• d whales
iv 4000 years
• e people
v 3 years
What does the word mean?
1 1.suppose a. know b. think it is true c.ask 3. release a. bring in b. take away c. let out 5. communicating with a. attacking b. sending message/ signals to c. joining
6. And can they really protect themselves from insects? Yes. They can produce a chemical that makes their leaves taste nasty.
7. Can trees help one another? Yes. For example. They can join their roots together underground and pass food and water around.
8. Is it true that, every year, there are fewer and fewer trees in the world? Yes. The reason is that people cut down millions of trees, but replace hardly any of them.
We get __fr_u_i_ts_from trees.
What do you know about…?
How long do they live?Match the items on the
left with the average ages on the right.
• a mice
i 70 years
dangerous or may happens
Find the facts
Trees:
1. live much longer than people; T 2. produce rubber, wood, paper, nuts, beans and fruit; T 3. rtealekaese oxygen from the air; F 4. hceoaotl the air; F 5. are like air conditioners; T 6. ccaannnot protect themselves against insects; F 7. can share food and water with one another; T 8. are in danger, mainly from ipnesoepclet/sh;umans F
3. I’ve heard that one tree has the power of 15 air conditioners. Is that right? No. One trees has the power of five air conditioners.
4. Scientists know a lot about trees, don’t they?
Do you know the meaning?
1. sip 2. nature 3. oxygen 4. hectares 5. warn 6. a chemical 7. nasty
a. made by nature, not by man b. unpleasant c. drink in small amounts d. a life-giving gas found in air e. something produced by chemistry f. areas of 10000 square meters g. gay that something bad or