英语：Chapter 2《Pollution Fighters》课件(1)(牛津上海版八年级下).ppt

Chapter Two Pollution Fighters Look and Think What good are trees? We get shade from trees. We get__________from trees. better cities We get _____________from trees. wooden houses We get __________from trees. furniture We get _____from trees. paper We get _______from trees. pencils We get _____from trees. coke We get __________from trees. coffee beans We get ______from trees. fruits 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 b trees ii 150 years c tortoises 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 2. pure not mixed with other things not comfortable 4. running traveling working playing 6. hardly any quite a lot almost none a large number 1. sip a. made by nature, not by man 2. nature b. unpleasant 3. oxygen c. drink in small amounts 4. hectares d. a life-giving gas found in air 5. warn e. something produced by chemistry 6. a chemical f. areas of 10000 square meters 7. nasty g. gay that something bad or dangerous or may happens Do you know the meaning? Find the facts Trees: 1. live much longer than people; 2. produce rubber, wood, paper, nuts, beans and fruit; 3. take oxygen from the air; 4. heat the air; 5. are like air conditioners; 6. cannot protect themselves against insects; 7. can share food and water with one another; 8. are in danger, mainly from insects; T T T T F F F F release cool can people/humans 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 cle