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Australia
South America
the Atlantic Ocean
the Indian Ocean
The Arctic Ocean
The Pacific Ocean
the oceans of the world
Let’s learn the new words :
planet: n.行星
billion: n.十亿;千兆
total: n.总数总计
adj. 总的；总计的
increase: v.增加增大
surface: n.表面；表层
Atlantic: n.adj.大西洋（的）
Arctic : adj. 北极的
Indian: adj. 印度的 n. 印度人
The world I know
.What problems does the earth face?
Reading
deserts
Snow and ice
High mountains
An increasing population
1.Read the lesson and match each paragraph with its main idea.
Paragraph1. a. Six of the seven are good for
people to live on
Paragraph 2. b. We should treat the earth well
Paragraph 3. c. An increasing population is a big
problem for the earth