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Unit 2 Saving the Earth Topic 3 What can we do at home to protect the environment?
Section D
科普2011课标版九年级英语上册
Knowledge aims
1. Learn and master some new words and useful expressions;
2. Talk about the importance of forests;
3. Review Compound Sentence(并列句），pay attention to and、or、but and while.
Moral aims
Learn more knowledge about the environmental protection and try to be a greener person.
1. Listen to 1a , underline the key points and the difficulties.
2. Try to answer the following questions.
1.How do you understand “Forests are the lungs of the earth”?
2.What difficulties do tree planters face when they plant trees ?
3.Why do they plant different kinds of trees ?
p49-reading.mp3
How do you understand “Forests are the lungs of the earth”?
Forests can remove carbon dioxide from the
air and make oxygen.
What difficulties do tree planters face when they plant trees ?
(1)The weather may be very hot and dry or it may be very cold and wet.
(2)There are often many insects that bite these planters on their legs, arms, and faces while they work.
(3)They carry heavy bags of small trees, and working in the mountains can be dangerous.
Why do they plant different kinds of trees ?
They plant different kinds of trees so that
birds and animals can live in the forests.
1. Read 1a again and find out the topic sentence of each paragraph
2. Discuss the usage of the key points and the difficulties.
Topic Sentence
Paragraph 1:
___________________________________