2020-2021学年北师大版（2019）高一英语选择性必修Unit3conservation(2)-Reading(2)课件

选择性必修一 Unit 3 Conservation (2) The Sixth Extinction Reading (2) Writing features Word choices Writing methods Adjectives The Sixth Extinction Writing style Teaching focus Verb phrases Writing purpose Revision Extinction? third fifth The Sixth Extinction Causes Effects Solutions Focus on writing features Writing features Writing methods Writing style Writing purpose Use different colored pens to highlight at least one example for each of the four elements listed below. Focus on writing features 1. In fact, over 90% of all species that ever lived are now extinct. 2. Many scientists say we are now entering the Earth’s sixth mass extinction. ·facts ·opinions / predictions ·reasons ·solutions fact opinion Focus on writing features Focus on writing features ·facts: ØIn the last 500 million years, there have been five times when life on Earth has almost ended. ØThe “Great Dying” killed 90% to 96% of all species. ØThe fifth event, which occurred 66 million years ago, caused the death of the dinosaurs. ØHuman activity is causing species to die out 1,000 times faster than normal. numbers ØMany scientists say we are now entering the Earth’s sixth mass extinction. ØScientists believe that up to three quarters of all species on Earth could die out. say, believe, think, in one’s opinion… ·opinions / predictions: Focus on writing features ØThere is a long list of reasons why so many species are dying out: air and water pollution, forests being destroyed, factory farming and overfishing . ØWithout forests, we would have no air to breathe and without clean water we would be unable to survive. reason, as, without sth. sb. would…, cause, because, due to, since, for… Focus on writing features ØWe need to take steps to save endangered species, including setting up special areas where plants and animals can be protected. ØWe need to change how we work and travel… ØWe also need to improve our farming methods. need to do, should do… Focus on writing features numbers facts scientists / experts say reason, as… we need to solutions reasons opinions/ predictions the sixth extinction exposition Focus on writing features Øgiving examples For example, we need to take steps to save endangered species, including setting up special areas where plants and animals can be protected. Focus on writing features Writing methods Øciting ideas from experts or authorities Øgiving examples Øusing data Focus on writing features Writing purpose Øto explain what the sixth extinction is and its effects Øto call on people to take action to prevent it from happening Focus on writing features Focus on word choices Word choices Adjectives Verb phrases Focus on word choices Word choices Adjectives Verb phrases Focus on word choices Match the adjectives and nouns to make meaningful expressions. entire endangered significant natural mass solar change resources extinction species energy animals Focus on word choices entire endangered significant natural mass solar change resources extinction species energy animals Use each expression to make a sentence. Focus on word choices 1.Climate change is happening right now. It is the most urgent threat facing our entire species and we should work together to stop the trend. 2. Many natural parks have been built to protect endangered animals. 3. We should make significant changes about the way we live. Focus on word choices 4. If we try our best to recycle the wastes, we can reduce pollution and conserve natural resources. 5. During the fifth mass extinction event, dinosaurs disappeared on Earth. 6. Solar energy is energy that comes from the sun and it can be used in many ways in our daily life. Focus on word choices Word choices Adjectives Verb phrases Focus on word choices 1. Extinctions, where entire species are wiped out, are not unusual in our Earth’s history. (Para. 1) wipe out to destroy or get rid of something completely be wiped out Focus on word choices Observation: Ø You can never wipe out the past. Ø One dose of penicillin can wipe out the infection. Ø Warmer sea temperatures have caused large areas of coral to be wiped out. Focus on word choices 2. Experts say that it is not yet too late, if we take action now. (Para. 4) take action to do something to deal with a problem Focus on word choices Observation: Ø It’s time for us to get rid of these bad habits and take action to protect the environment. Ø To keep fit, you have to take action and do some exercises. Focus on word choices 3. For example, we need to take steps to save endangered species, including setting up special areas where plants and animals can be protected. (Para. 4) take steps to take measures set up to arrange, organize or build Focus on word choices Observation: Ø The government must take steps to protect the rain forest. Ø They set up many branches throughout the country. Focus on word choices die out be known as have effected depend on wipe out take steps take action set up take care of In the last 500 million years, there have been five mass extinction events on Earth. In the third event, which 1 the “Great Dying”, 90% to 96% of all species 2 . Of course, species died out due to many causes. But nowadays, human activity 3 all types of species that we 4 for living. is known as died out has affected depend on die out be known as have effected depend on wipe out take steps take action set up take care of Focus on word choices We need to 5 to avoid the sixth mass extinction. We should 6 to save endangered animals and plants, and 7 special areas to 8 them before the next extinction comes that may 9 the entire species. take action / take steps set up take care of wipe out take action / take steps Writing features Word choices Data Examples Experts / scientists Adjectives The Sixth Extinction Exposition Summary Verb phrases Homework Thank you!