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课件网) Unit 3 Conservation Lesson 1 Period 2 Recall Extinctions are not (1) u_____ circumstances, in which entire (2) s_____ are (3) _____. There are (4) v_____ causes for extinctions: (5) v_____ eruption, asteroids colliding the planet from space and the (6) d_____ of the oxygen content of the sea and so on. Scientists (7) _____ universities in the US were looking at how rapidly species were (8) _____ due to natural factors and human activity. It (9) _____ that human activity has negatively (10) a_____ all other species, causing the procedure of extinction 1, 000 times faster than normal. nusual pecies aried olcanic ecrease based at dying out ffected wiped out Fill in the blanks using the correct form of the words and phrases. turns out Recall In fact, we humans would also (11) _____ of dying out if the 6th mass extinction arrives. This time, human activity will (12) _____. In order to avoid it, several actions should be taken right now—including (13) _____ save (14) e_____ animals, (15) _____ nature reserves to (16) r_____ their habitats and using cleaner, more natural sources of energy, such as wind and (17) s____ energy. Wildlife workers began a programme and helped black robins to (18) h____ their eggs—(19) _____ their efforts, the population of them is now spreading. Our world and our lives (20) _____ the balance in nature so much, if we want to survive, then start to protect it. be at risk be to blame taking steps to ndangered setting up estore olar atch thanks to depend on Collocations Use the adjectives and nouns to make meaningful expressions. Then use each expression to make a sentence. endangered animals entire species significant change natural resources mass extinction solar energy 1 In the early 1900s, a demand for coats made from the fur of koalas threatened to destroy the entire species. 2 Endangered animals are species that are at risk of becoming extinct, often because of human activity. 3 Significant changes have taken place in this area in the past few years. Suggested answers Collocations 4 They are looking at ways of reducing the waste of natural resources. 5 While the dinosaurs were the most famous victims of this mass extinction, it seems that up to 99 percent of all living things were killed and that 75 percent of all species living on Earth were wiped out at that time. 6 The biggest drawback to solar energy is that it cannot work at night or on cloudy days. Collocations Complete the paragraph about extinctions using the correct form of the phrases below. 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. We need to 5_____ to avoid the sixth mass extinction. die out be known as have affected depend on wipe out t ... ...
