(
课件网) Lesson 1 The Sixth Extinction Unit 3 Conservation 1.To read and talk about conservation; 2.To read for general understanding; 3.To read for specific information and understanding words in the context; 4.To express solutions to environmental problems. Learning objectives What can you see in the picture 1 What does extinction mean 2 Lead in 1. How many times up to today has life on Earth almost died out a. Once b. Five times c. More than 10 times 2. About what percent of all species on Earth became extinct during the mass extinction known as the “Great Dying” a. Less than 10% b. Nearly 50% c. More than 90% 3. What do scientists think will cause the next mass extinction a. Human activity b. Natural causes c. Unknown reasons How much do you know about them Choose the option based on your knowledge. Pre-reading Read the text about extinction and find the main idea for each paragraph. Para.1 Para.2 Para.3 Para.4 a causes/reasons b what might happen c what we can do d background history While-reading Read Para. 1 and answer the question. Extinction Meaning The number of extinction that have occurred so far Two notable extinction and their consequences The usual reason Entire species are wiped out. Five. The third one(“Great Dying”): Killed 90% to 96% of all species. The fifth one: Caused the death of the dinosaurs. Volcanic eruption; Asteroids hitting the Earth from space; Changes in sea levels; The decrease of the oxygen content of the sea and global warming. While-reading Read Para. 2 and answer the question. 1. What did scientists find out in 2015 2. What are the main reasons that cause the sixth extinctions Scientists found that human activity is causing species to die out 1,000 times faster than normal. 1) Air and water pollution; 2) Forests being destroyed; 3) Factory farming; 4) Overfishing. Read Para. 3 and answer the question. Why does the writer believe we’ll probably die out if 75% of the Earth’s species die out Because our world and our lives depend on the balance in nature between animals and plants. Read Para. 4 and answer the question. What did people do in the case study to protect black robins Which claim(s) did the case study support in the text Change the way we live; Set up special areas for endangered species; Change the way we work and travel; Improve our farming methods to reduce water, air and land pollution. Read The Black Robin and answer the question. 1. What did people do in the case study to protect black robins 2. Which claim(s) did the case study support in the text The case study showed that even in desperate situations, we can do something to help. In short, it’s never too late. Use different colored pens to highlight at least one example for each of the four elements listed below. facts opinions/predictions reasons solutions Post-reading · facts · reasons · opinions / predictions · solutions 1 2 3 2 3 1 2 1 2 3 3 1 Think & answer 1. What text ty ... ...
