3. How beautiful the sea is!

4. Revision What can you see in the picture? beach seaside seabed wave

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

8. 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

9. 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 blue oceans two-thirdssurface below

10. 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.

11. the Mediterranean between Europe and Africa

12. 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

13. 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.

14. 点击画面，观看影片

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

17. Part 5 : the Dead Sea

18. What is the saltiest lake in the world? Key: The Great lake The Great lake What is the famous salt lake in the world? Key: The Dead Sea The Dead Sea

19. What makes the lake so salty? Reason:Water is lost into the air It is very low lying

20. floating on the sea Reason:Because very few things can live in such salty water Why is it called “ The Dead Sea ” ？

21. Part 5 :the Dead Sea few living things a salt lake:250 parts

24. 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:

25. 3 、 with a depth of less than 60 metres/at a great depth depth/weight/length/height 4 、 below sea level above sea level at the bottom of the sea 5 、 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）

26. What can we infer from the pictures?

27. Problem: Become a danger to life How can we protect our sea? (discuss after class)

28. The end !