A song

Revision （复习） Speaking practice ( 口语练习 )

Work in pairs, use “ Have we(you) ever…? ” to talk about the pictures. sent travel see find talk to spacecraft UFO alien

Presentation( 呈现新课 ) 1.Why things cannot grow on other planets? 2. How many stars are there in the galaxy? 3. How large is the universe? 4. Are we alone in space? Questions:

Module 3 Unit 2 We haven’t found life on other planets yet.

New lesson ( 新课 ) Read the passage on page20, and choose the best title.( 阅读课文, 选出最恰当的标题 ) 1.Anyone out there? 2. Life on Earth 3. Our solar system 4. The stars at night

Paragraph 1 ( 第一段） Scientists think that there has been life on Earth for millions of years. However, we haven’t found life on other planets yet. Why not? 数以百万计的 … Notes( 笔记 ) million, 前面没有具 体数字, 注意用复数.

Paragraph 2( 第二段） The Earth is a planet and it goes around the Sun. Eight other planets also go around the Sun.None of them has an environment with air,so people and things cannot grow. The Sun and its planets are called the solar system. The solar system is a small part of our galaxy. Notes( 笔记 ) 围绕 … 运转 with+ 名词，作介词 短语用，可以译为： 带着，伴随着 …… 的 e.g. a room with a TV 被称为 be + 过去分词, 表示 被动语态 e.g. The door is locked.

Mercury Venus Earth Mars Jupiter Saturn UranusNeptune Our Solar system Sun Pluto

The stars we see at night are the suns in other solar systems. There are more than 200 billion stars in our galaxy,called the Milky Way, and our Sun is only one of them. billion 前面有具体的 数字，就不能加 s. 银河 普通名词，表示 “ 恒星 ” 专有名词，指太阳 Paragraph 3 ( 第三段） Notes( 笔记 )

Paragraph 4 ( 第四段） Notes( 笔记 ) But scientists have discovered many other galaxies in the universe. They are a long way away and their light has travelled for many years to reach us. It is hard to understand how large the universe is. 表达 “ 做某事是怎么样的 ” 用句型： It is + 形容词 +to do sth. e.g. It is easy to run.

Paragraph 5 ( 第五段） Notes( 笔记 ) Scientists have sent lots of spacecraft to look at other planets in our solar system, and some spacecraft have gone beyond the solar system. However, no one has discovered any life in space yet. No one 或 nobody 作 主语时，是作三单 用。

Paragraph 6( 第六段） But why has no one from other planets sent us a message? Have they tried to send information to us ? With so many stars in the universe, are we alone,or is there life out there in space? We don’ t know…yet.

Activity 3 Put the words and expressions in the box in order:small– large.( 把框格中的单 词和短语按体积从小到大排列） galaxy planet solar system star universe

Activity 4 Check(√) the true sentences. 1.The Earth is a star. ( ) 2. The Sun is a star. ( ) 3. There is more than one galaxy. ( ) 4. Our galaxy is part of the Milky Way. ( ) 5. The light from stars has taken a long time to reach us. ( ) 6. Scientists have found life on other planets. ( ) 7. They’ve received many messages from space. ( ) 8. They’ve visited most of the universe. ( )

Reflection( 反思 )

Presentation( 呈现新课 ) 1.Why things cannot grow on other planets? 2. How many stars are there in the galaxy? 3. How large is the universe? 4. Are we alone in space? Questions:

1.Retell the text. ( 复述课文 ) Homework 2.Find more information about people explore the universe. ( 查找更多关于人类探索宇宙的信息 )