高二英语课件 Unit 16 lesson62 儋州市那大中学 杨卫平制作

The Arctic Ocean Europe North America Asia Africa The Pacific Ocean The Atlantic Ocean The Indian Ocean South America The Pacific Ocean Oceania Antarctic

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

It lies off the northeast coast of Australia. 2.Where is the longest coral bed in the world? It lies off the northeast coast of Australia.

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

4. How much of the earth’s surface is sea? √ C. 71% B. 56%

The earth looks blue from the space because it is so far away.

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 to keep the seawater clean.

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. F

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

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

3.5% 3.7—3.9% 25% 27% How salty are different lakes and seas? NAME Oceans Mediterranean Dead Sea Great Salt Lake % 3.5% 3.7—3.9% 25% 27%

3,700km 1,800km 25℃-29 ℃ 3.7-3.9 % Something about the Mediterranean. Length Width Temperature Salt 3,700km 1,800km 25℃-29 ℃ 3.7-3.9 %

Conditions for coral. clear water water temperature above 20℃ plenty of light water depth of less than 60 meters clear water

1. What is the most famous salt lake in the world? The Dead Sea 2.Where is the saltiest lake in the world? The Great Salt Lake.

3. Why is the lake called The Dead Sea? Because very few things can live in such salty water.

minerals from thousands of natural springs and the River Jordan Why did the Dead Sea become the saltiest lake in the world? minerals from thousands of natural springs and the River Jordan little rain there no river flowing out of the lake

_____from space, the earth looks blue _____from space, the earth looks blue.This is because ____ _____ of the earth’s surface is______ ___ ____ vast oceans. The oceans of the world are_______. Seen thirds two made up of salty

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 on average contains

thousand parts of water, or 25% _____weight 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 by Salt Lake Great beds coral

largest coral bed _____ _____ the northeast coast of Australia. lies off

Seen from space, (=When/ If it is seen from space,) e.g. Folded up along the lines, the paper will be a little box. =When/If it is folded up along the lines,…

These three stories make up the whole book . make up /be made up of These three stories make up the whole book . The book is made up of these three stories.

These workers are paid by the day. That is 3.5% by weight. These workers are paid by the day. Sugar is sold by the pound, eggs by the dozen,and cloth by the yard.

How can we protect our sea?