资源简介

(共17张PPT)
Unit 1　
Nature in the balance
Section 1　Welcome to the unit & Reading
1．Understand the importance of environmental protection;
2．Understand the documentary script by applying the strategy of drawing charts；
3．Retell the documentary script in your own words.
1．What has the human race done to the Earth according to the song
________________________________________________________________________________________________________________
Activity 1
Lead–in
话题导入
People have done much harm to the Earth, including polluting soils and seas and cutting down too many trees.
2．What do you think the script is about according to the title and pictures on page 2
______________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________
I think the script “The Amazon rainforest: a natural treasure” is about the Amazon jungle and the plants and animals found there. They are all natural treasures because they are valuable to the Amazon. The pictures show that the plants and animals living in the Amazon rainforest are unusual and beautiful. There are different kinds of animals that depend on the rainforest for shelter and food.
1．Read the documentary script and write the main idea of each paragraph.
Para.1: Introduction to the Amazon rainforest.
Para.2: Basic information about the rainforest.
Para.3: (1) ________ diversity and different (2) _________ of the rainforest.
Para.4: Animal diversity and a food (3) ________．
Para.5: The rainforest’s (4) ________ to the human race and the major (5) _________ to it.
Activity 2
First–reading—Read for the main idea and structure
一读，读大意和结构
Plant
levels
chain
value
threat
2．What’s the structure of the documentary script
答案：D
1．Read Paras.1–2 and fill in the blanks.
The status of the Amazon rainforest is (1) ______________________ _________．
The Amazon rainforest lies on (2) _________________________．
It is named after (3) ________________．
The Amazon rainforest and the Amazon River have our planet’s (4) __________________．
Activity 3
Second–reading—Read for details
the largest rainforest in the world
the South American continent
二读，读细节
the Amazon River
richest biodiversity
2．Read Para.3 and complete the mind map about different levels of the rainforest.
Level 5 Top level：(1) _______________________
Level 4 (2) ________________________
Level 3 (3) __________________________
Level 2 (4) ___________________
Level 1 Bottom level: a system of roots(根系) beneath the ground
the tops of the tallest trees
towering ancient hardwoods
shorter plants with large leaves
the mass of leaf litter
3．Read Para.4 and complete the following chart about the food chain in the rainforest.
Jaguars
At least 87 species, including frogs
Insects
Leaves and fruit
Microorganisms
4. Read Para.5 and explain why the Amazon rainforest is a treasure.
____________________________________________________________________________________________________________________________
The Amazon rainforest is often known as the “lungs of the planet”. Moreover, it is a treasure house of species that can be used for food or medicine.
Read the script again and fill in the blanks of A2 on page 4 of the textbook.
1．What is the purpose of using so many figures
____________________________________________________________________________________________________________________________________________________________________________________________
Activity 4
Third–reading—Read for further thinking
三读，深入思考
The purpose is to provide specific and accurate information, to support the statement and make the statement more persuasive and convincing, and to make people realize the importance of the rainforest in a direct way.
2．Can we afford to damage the “lungs of the planet”？ Why What should we do
______________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________
No. Because it is of great importance to maintain the balance of the ecosystem that provides our society with food and medicine. So we should do the following things. Firstly, the government should enhance the citizens’ awareness of rainforest protection and establish nature reserves. In addition, schools should strengthen environmental education and set up a bulletin board. Last but not least, we students should try to do whatever we can to protect the environment.
The Amazon rainforest, 1．________ is the largest rainforest in the world, crosses into eight countries, 2．____________(include) Brazil and Peru, and one overseas region of France. The Amazon River, from which the rainforest gets its name, is close to 6,400 kilometres in 3．_________(long), and supports many different ecosystems. Of the 390,000 plant species 4．________(know) to humans, more than 40,000 can be found in the Amazon. The forest’s different levels support 5．_____ unbelievable variety of wildlife.
Activity 5
Summary
课文概要
which
including
length
known
an
Each level of the forest forms its own little world, home to different kinds of 6．_________(live) things. The Amazon rainforest breathes life into the planet by fixing carbon and 7．____________(produce) over 20 per cent of all the Earth’s oxygen. Thus, 8．_____ is often known as the “lungs of the planet”. However, over the past 50 years, about 17 per cent of the rainforest 9．__________________(disappear) due to human activities. As a result, we have to think about the question whether we can afford 10．____________(damage) the “lungs of the planet”．
living
producing
it
has disappeared
to damage
Finish B1 on page 5 of the textbook.

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