资源简介

(共16张PPT)
Welcome to the unit
Unit 7 The natural world
八年级上册
Free talk
1. What can you see in the picture
I can see a white bird flying over the water.
2. Where does this kind of bird like to live
This kind of bird likes to live in open areas with water, like wetlands.
Free talk
What different types of ecosystems do you know
forests
deserts
oceans
wetlands
grasslands
polar regions
Lead-in
What will we do in this unit
better understand the importance of protecting ecosystems.
give suggestions on how to protect ecosystems;
learn about protecting ecosystems;
read about different ecosystems;
2
4
1
3
In this unit, we will
Fun facts about ecosystem
Finish Part A on page 93.
Describing different ecosystems
What can you see in the picture
What ecosystem does it show
I can see many plants.
This is the rainforest ecosystem.
Describing different ecosystems
I can see colourful coral reefs and fishes.
This is the ocean ecosystem.
What can you see in the picture
What ecosystem does it show
Describing different ecosystems
I can see wide open areas with green grass and a few trees.
This is the grassland ecosystem.
What can you see in the picture
What ecosystem does it show
Describing different ecosystems
I can see four penguins standing on the ice.
This is the polar ecosystem.
What can you see in the picture
What ecosystem does it show
Listening for the general idea
Listen to Kitty and David’s conversation in Part B on page 93 and answer the following question.
Which of the ecosystems do they mention
Listening for details
Listen to their conversation again and complete the table below.
Grasslands Deserts
Climate — It’s dry with little (3) _____. There’s a huge difference in (4) __________ between day and night.
Animals & plants Grasslands in different places are home to different animals, like (1) _______________ in Inner Mongolia, but (2) ______________ in Africa. (5) _________ animals and plants can live there. The desert plants keep water in their (6) _________, and many animals can get water from these plants.
horses and cows
lions and giraffes
rain
temperature
Only a few
leaves
Role-play
Read the conversation aloud in different roles.
Discussion
Work in pairs and talk about fun facts about ecosystems they know, using Kitty and David’s conversation as a model.
A: Do you know anything about …
B: I know that … in different places are home to ... In …, there
are …, but in …, there are ...
A: Oh, really Do you know anything about …
B: Well, it’s ... And ...
A: Yes, the climate in ... is ...
B: It’s true. They help … and give food to ...
What other fun facts about ecosystems do you know
Discussion
Oceans cover about 71% of the earth’s surface, making them the largest ecosystem on earth.
Grasslands have very few trees but lots of tall grasses and wildflowers.
In deserts, some plants can live without rain for years.
Polar bears live in the North Pole, and penguins live in the South Pole.
...
Homework
Search for more information about different ecosystems from books or on the internet after class and then complete the table below.
Ecosystem Climate Animals and plants
Deserts
...
...
Thank you!

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