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北师大版高二下Unit21《Human Biology》(Lesson 2)ppt课件1

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Brain Power Look at the following numbers for about one minute and then write down as many as you can remember . meeting, student, school, homework, study, playground, match , teacher , basketball , exam , mark , sports, film , hand in ,holiday , watch , game Test your memory Before you start : Match the key words with the definitions . atom , billion , cell , nerve cell , organ 1. one thousand million 2. a part of the body that has a particular purpose , e.g. the heart , the liver 3. the smallest piece of something that can exist alone 4. a tiny part of the body that helps carry messages to and from the brain 5. a unit of living matter Keys: billion , organ , atom , nerve cell , cell Key words study Complete the sentences with the following words . atom , billion , cell , nerve cell , organ , function , sight , hearing ,fear atom , billion , cell , nerve cell ,organ , function , sight , hearing , fear 1.He watched the boat until it is out of sight . 2.How many atoms are there in the universe ? 3.The medicine is made to kill cancer cells . 4.The eye is the organ of sight . 5.The population of China reaches up to 1.3 billion . atom , billion , cell , nerve cell ,organ , function , sight , hearing , fear 6.The function of the heart is to pump blood through the body . 7.A nerve cell is a tiny part of the body that helps carry messages to and from the brain . 8.He showed no fear in facing the big difficulty . Listening strategies: Completing a text 1 Before you listen , read the text and predict what kind of information you need . 2 Underline some important words in the text before each gap . 3 While you are listening , listen for these important words – the information you need should follow them . 4 You can complete the gaps using abbreviations –then write them in full . Important word(s) and our predictions For example : 1.consist of 2.weighs a color how heavy ?(number) 3.energy 4. contain how much ?(number) how many \ much ? (number) Important word(s) before each gap : 1. consist of 2. weighs 6. are responsible for 7. controlling 3. energy 4. contain 8. signals 9. emotions 5. more … than … 10. own (language) Listening 1 Listen for the first time : get a general idea. Don’t hurry to write down your answers . 2 Listen again : write down your answers and check with your partners . 3 Listen for the last time : check your answers again and make sure they are right . Listening Listen to the science lesson . Use the strategie



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