How beautiful the sea is!

Revision

What can you see in the picture?

beach

seaside

seabed

wave

Talk about the picture of the Talk about the picture of the seaside: seaside: What are they doing on the beach or in the sea?

Model:

Some people are swimming in the sea; some are bathing in the sun; others are playing on the beach. There are several small boats nearby. A few sailors are on them. Some are fishing in the sea. It seems that everyone on the pictures is enjoying himself very much.

Seen from space, the earth looks blue. This is becausetwo thirds of the earth’s surface is made up of vast oceans.

Preparation for Reading Look at the model of the earth How much of the earth’s surface is the sea?

key 2/3

Part 2: sea water

Part 3: the Mediterranean

Part 4: coral in the sea

Part 5: salt lakes (the Dead sea)

Part 1: general introduction

Reading

Turn to Page 20. Read through the text and find out the general idea of each paragraph

Seen from space, the earth is ______. This is because the vast ______ cover up __________ of the earth’s ________ , and much of the surface lies _______ the sea.

Part 1: General introduction

blueoceans

two-thirds surfacebelow

Part 2: sea water

seaweeds

How does water stay clean?The answer is that seaweeds produce various chemicals that help keep the sea water clean.

the Mediterranean

between Europe and Africa

Part 3: the Mediterranean

Size: 3700 km long

1800 km wide

Salt : 37-39 parts losing water to the air

hard to be changed with Atlantic water

( one entrance )

the Straits of Gibraltar

hot weather

What is the coral?A coral is a small, marine animal without a backbone. Corals support their soft bodies within hollow “shells”of bonelike material.

点击画面，观看影片

What conditions are needed for coral to grow in the sea ?

Note makingWhat conditions are needed for

coral to grow in the sea?a. water temperature above 20 b. lightc. clear waterd. depth of less than 60 meters

Part 5: the Dead Sea

What is the saltiest lake in the world?

Key: The Great lake

What is the famous salt lake in the world?

Key:

The Dead Sea

salt stayingsalt staying

What makes the lake so salty?

Reason:

Water is lost into the air

It is very low lying

floating on the sea

Reason:

Because very few things can live in such salty water

Why is it called “The Dead Sea” ？

Part 5 :the Dead Sea

few living things

a salt lake: 250 parts

True or false1. There are 11 minerals that make up the salt water of the oceans.2. The Mediterranean is more 3,700 km long, and is 1,800 km wide at the widest point.3. There are two narrow entrances where the Mediterranean meet the Atlantic.4. The longest coral bed in the world is 2,010 kilometers long.5. The Great Salt Lake in the USA contains 27 parts of per thousand.6. The Dead Sea is 395 meters below sea level.

Keys: 1. F. 2. T 3. F 4. T 5. F 6. T

1 、“ Seen from the space, the earth looks blue.”e.g. 1) Given more time, we could do it better.　 2) Moved by the story, they decided to help the girl.　 3) Lost in thought, he didn't see me when I come in.2 、 Pay attention to the expressions of measurements by weight  按重量 by distance 记程 by time 计时 by the day 按天 by the hour 按小时 by the meter 按米 by the pound 按磅

Now Let’s study some language points:

3 、 with a depth of less than 60 metres/at a great depth depth/weight/length/height4 、 below sea level　 above sea level　 at the bottom of the sea5 、 on average e.g. The headmaster’s office receives 3 letters every week on average.6 、 cubic metre ( 立方米 )         square metre（平方米）

What can we infer from the pictures?

Problem:

Become a danger to life

How can we protect our sea?(discuss after class)

The end !

Great Salt Lake, large salt lake in north-western Utah and one of the most famous natural landmarks in the United States.

Dead Sea, salt lake in southwestern Asia. Bounded on the west by Israel and the West Bank and on the east by Jordan, the Dead Sea forms part of the Israeli-Jordanian border. The surface of the Dead Sea, 408 m (1,340 ft) below sea level as of 1996, is the lowest water surface on earth.