山东滕州二中 蔡善森

Teaching Aims

I.Know about the content of the text.

II. Retell the text.

Words:salty the Dead Seavast low-lyingsolid floatmineral partlyseaweed Jordanvarious merelyAtlantic depthcoral constructionvariety

盐的，咸的巨大的，广阔的固体（的）

矿物（质）海草 / 藻

各种各样的大西洋（的）

珊瑚（虫）多样化；种类

死海地势低洼的

漂浮，浮动部分地约旦（亚洲）

仅仅深度

建设，建造

The Pacific Ocean

The Arctic Ocean

AsiaNorth America

Africa

Europe

South America

Antarctic

Oceania

1.How salty is the water in the ocean? A. 3.5% B. 11% C. 25%

2.Where is the saltiest lake in the world?

The Great Salt Lake.

Answer the questions:

3.Where is the longest coral bed in the world?

It lies off the northeast coast of Australia.

4.How does sea water stay clean?Seaweeds produce various chemicals that keep the sea clean.

1. The earth looks blue from the space because it is so far away. ( F )

( F )

( F )

( T )

2. Only a few people have seen much of the earth’s solid surface before.

3. Altogether there are eleven minerals that make up the salt water of the ocean.

4. Chemicals produced by seaweeds help keep the seawater clean.

( T )

( F )

( F )

( T )

5.The surface water of the Mediterranean in summer can reach up to 25°C.

6.According to the passage, if the sea loses a lot of water to the air, there might be parts of salt per thousand of water.

7.Coral beds can be seen everywhere in the sea all over the world.

8.Corals must live in clean water and dirty water will kill them.

Conditions for coral.

water temperature above 20℃

plenty of light

clear water

water depth of less than 60 meters

_____from space,the earth looks blue.This is because____ _____of the earth’s surface is_____ vast oceans.The oceans of the world are_____.The Dead Sea,where there is merely 60mm rain in a year____ ________,is the most famous salt lake in the world.The water of the Dead Sea_______about 250 parts of salt to every thousand parts of water,or 25% _____weight.The saltiest lake in the world is the______ _____ _____.Hot parts of the world where the sea is not deep have______ ______.The longest coral bed _____ _____the northeast coast of Australia.

Seen

two thirds made up ofsalty

on averagecontains

byGreat Salt Lake

beds

lies off

coral

课文浓缩： 从太空望去，地球看上去是蓝色的，这是因为地球表面的三分之二是由广阔的海洋构成的。 世界上的海洋都是咸的。平均每年只有 60 毫米降雨量的死海，是世界上最著名的咸水湖，死海中的水每千份水里含有 250 份盐，或者说按重量计占 25% 。世界上最咸的湖是大盐湖。世界上一些炎热的地区，在海水不深的地方常有珊瑚礁。世界上最长的珊瑚礁位于澳大利亚的东北沿海。

Homework

I. Retell the text

II. Learn the words by heart

III. Translate lessons62&63