(
课件网) Reading Unit 7 The natural world 八年级上册 Revision Speak out! Which of the following ecosystems do you know best Pre-reading What kinds of things do you think are in an ecosystem plants animals … Living things Non-living things air water soil sunlight … An ecosystem Pre-reading What do you know about oceans, wetlands and forests Prediction Prediction 1. What is the article about It’s about the three main ecosystems on earth—oceans, wetlands and forests. 2. What can you see in the pictures Picture 1: I can see dolphins and the ocean. Picture 2: I can see birds and a wetland. Picture 3: I can see trees and a forest. 3. What type of text is the article It’s an expository text. While reading 1. Listen to the article and analyse its structure. Main ideas Paragraph(s) What is an ecosystem (1) _____ What are the three main ecosystems (2) _____ How important are the ecosystems (3) _____ 1 2–4 5 While reading 2. Scan the article and finish Part A on page 96. b, d, h c, e, i a, f, g While reading 3. Read the article again and finish Part B on page 96. While reading Paragraph 1 Read the following sentences. Write a T if a sentence is true or an F if it is false. Then correct the false one(s). _____ 1. An ecosystem includes only living things in an area. _____ 2. Ecosystems are always large, like grasslands or oceans. _____ 3. Every ecosystem has a special role and helps keep the planet balanced. F F T all the living and non-living things in an area. can be of different sizes. While reading Paragraph 2–4 E c o s y s t e m s The ocean— the “ (1) _____” of the earth · (2) _____ around 70% of the earth’s oxygen · Support the water cycle Wetlands— the “ (3) _____” of the earth Forests— the “ (6) _____” of the earth · Be home to around 40% of all the types of plants and animals · Help (4) _____ pollution and make the water clean · Help prevent floods by (5) _____ like huge sponges · (7) _____ carbon dioxide and produce oxygen · (8) ___ harmful things and help clean the air heart Produces get rid of kidneys storing water lungs Take in Trap While reading Paragraph 5 What does each of these ecosystems support Each of them supports millions of plants and animals. While reading Post-reading Finish Part C on page 97. surface is home to Post-reading oxygen take in store role get rid of balance Consolidation Introduce the earth’s main ecosystems with the help of the chart below. The ocean The ocean is a … It covers … and produces … It holds …, and … rises to …, falls onto … and then returns to … This goes on and on, so the ocean is just like … Wetlands Wetlands only cover … But they are home to … Plants in wetlands help get rid of … and … Wetlands can also help prevent … During heavy rains, wetlands store … They act like … Forests Forests make up … Plants there take in … and produce … They also trap … and help clean … Therefore, … Appreciation ——— Simile R ... ...
