1. 掌握重点词汇和短语：planet, crowded, polluted, rapid, increase, passenger, uncomfortable, oxygen, tasty, specially, float, compare, interplanetary, network, challenging, rapidly, all over again, at a/the speed of, in the form of, compare to/with

2. 掌握重点句型：

Our own planet, the Earth, is becoming more and more crowded and polluted because of the rapid increase in population.

With the development of technology, by the year 2100, the journey might only take about 20 minutes in spacecraft that travel at the speed of light!

The gravity on Mars is only about three-eighths of that on the Earth.

At present, our spacecraft are too slow to carry large numbers of passengers to Mars—it would take months.

Every student would have a computer at home connected to an interplanetary network.

Life on Mars would be interesting as well as challenging.

在语境中学习有关火星生活的话题词汇，形成词汇网。
用英语就火星生活和地球生活的不同之处进行交流，培养想象能力和审辨式思维能力。
培养学生保护地球的意识。

二、教学重点及难点

重点：

1. 在语境中指导学生学习有关火星生活的话题词汇，形成词汇网。

2. 用英语就火星生活和地球生活的不同之处进行交流，培养想象能力和审辨式思维能力。

难点：

1. 用英语就火星生活和地球生活的不同之处进行交流，培养想象能力和审辨式思维能力。

2. 培养学生保护地球的意识。

三、教学过程

Step 1 Revision

Guide Ss to fill in the blanks with proper words according to the article.

【设计意图】检测学生在与语境中使用语言的情况。

Step 2 Pre-reading

Guide Ss to think and say: Why do people want to move to Mars?

【设计意图】引导学生思考并就问题说出自己的看法，激活已知和激发学生对美好大自然

及地球的热爱。

Step 3 While-reading

1. Guide Ss to read the text and answer the questions.

2. Guide Ss to analyze life on Mars and fill in the form.

【设计意图】引导学生阅读并完成相关活动，对文本内容进行有效回顾，帮助学生进一步巩固文本信息。在发展学生语言运用的能力和信息转换的能力的同时，训练学生的思维能力。

Step 4 Post-reading

1. Guide Ss to learn some language points.

【设计意图】通过聚焦语言学习，引导学生关注核心语言，提升学生的语言能力。

2. Guide Ss to discuss the questions about life on Mars.

3. Guide Ss to work in groups and discuss What should we do or shouldn’t we do to protect the earth?. Then write down their suggestions.

【设计意图】让学生了解火星上的恶劣环境及人类生存的基本条件，通过讨论让学生增强保护地球的意识。

Step 5 Summary

Summarize what they’ve learnt in this class.

Step 6 Homework

Remember the new words, phrases and sentences.
Retell the article.
Preview Grammar.

【设计意图】帮助学生内化语言和信息，积累语言。

四、板书设计

Unit 4 Life on Mars

Reading (II)

1. Our own planet, the Earth, is becoming more and more crowded and polluted because of the rapid increase in population.

2. With the development of technology, by the year 2100, the journey might only take about 20 minutes in spacecraft that travel at the speed of light!

3. The gravity on Mars is only about three-eighths of that on the Earth.

At present, our spacecraft are too slow to carry large numbers of passengers to Mars—it would take months.
Every student would have a computer at home connected to an interplanetary network.
Life on Mars would be interesting as well as challenging.