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选修7,U3P1 Warming up


选修7

Unit 3

Under the sea

Objective
了解海洋(海底)生物。

Words review
anecdote n. 轶事;奇闻 annual adj. 每年的;按年度计算的 n. 年刊;年鉴

Today, we’r

e going to take a look at the world under the sea. So, are you ready?

Now, we are on a snorkelling trip under the sea.

We’ll come across a great variety of marine animals. Come on!

What are they?

Dolphins 海豚

Look. It’s coming towards us.

Turtle 海龟

What’s this?

Sea horse 海马

Squid 鱿鱼

This looks beautiful!

Sea star 海星

Jellyfish 水母

Coral 珊瑚

Different kinds of little fish

Angel fish 天使鱼

Anemone fish 海葵鱼

Clown fish 小丑鱼

A shark is coming. Look out! It’s dangerous.

He noticed us. We’d better leave him alone before it’s too late. Bye, Mr Shark!

We are safe now. And I caught a sea star near the shore.

If you like, where can you go to see more about the ocean life? at an aquarium on a boat tour

in books, on the Internet, in the Ocean Park, on TV nature programmes, in films, etc.

In groups, make a list of plants and animals that live under the sea that you and your classmates have seen in any of the ways listed above. Share what you know about these plants and animals.

What’s happening in the pictures?

A Killer Whale

What is a whale?
Whales are huge, intelligent sea mammals. They breathe air through blow-holes into lungs (unlike fish who breathe using gills). Whales have smooth, shiny, streamlined (流线型) bodies that move easily through the water.

Classification of whales There are two types of whales alive today: toothed whales (齿鲸类) and baleen whales (须鲸类). Toothed whales have teeth and a single blowhole. They feed on eat fish and other sea mammals. Baleen whales are larger than toothed whales. They are filter feeders (滤食者) that use baleen to sieve (过滤) food, and have two blowholes.

Killer whales (虎鲸) belong to toothed whales, who are the largest of the dolphins and king of the sea, biggest carnivore (食肉 动物) of the sea, killing all kinds of animals in the sea, even the huge blue whale, like tigers on land, working in a team.

Average lifespan: 50 to 80 years Size: 7 to 9.7 m Weight: up to 6 tons

Killer whales

Baleen whales are characterized by having baleen plates for filtering food from water, rather than having teeth. Baleen whales are generally larger than toothed whales, and females are larger than males. This group includes the largest known animal species, the Blue Whale.

Baleen whales

What do you think is happening in the picture?

Read the introduction of the passage on page 19 and then fill in the chart below.

Brief introduction of the passage

Writer

Vocation
Style

Clancy A whaler Anecdotes

At the beginning of the 20th Time century Southeastern coast of Australia Place The killer whales helped the Main idea whalers catch the baleen whales

Homework 1. Look up the new words and expressions of the Reading in the dictionary. 2. Preview the Reading: OLD TOM THE KILLER WHALE


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