(共32张PPT)
Unit 4
Life on Mars
Reading
Planets in the solar system
Mars is the nearest to Earth.
Mars
Earth
Lead in
The surface of Mars is a little like the surface of Earth.
We can build a better world on _________.
Mars
Mars One Program in Dutch (荷兰)
settlers
Moving to Mars
Life on another planet
Read the article quickly and answer.
What is the article mainly about
Life on Mars.
Reading
The main idea of each paragraph
Para. 1
Para. 2
Para. 3
Para. 4
Para. 5
Para. 6
Para. 7
home
gravity
school
transport
food and space travel
food, water and air
problems on Earth
a force that keeps us from floating in the air
Part 1 (Para. 1)
Problems on Earth
Read and answer.
1. When can we live on the planet Mars
By the year 2100.
2. Why do we need to move to Mars
Our own planet, Earth, is becoming
more and more crowded and polluted.
crowded and polluted
Read Para. 2 and fill in the blanks.
Part 2 (Para. 2-4)
Life on Mars in some ways
spacecraft
space shuttle
They are ________ and it takes ________ to fly to Mars.
too slow
months
They travel at _______________ and it might take _________________.
half speed of light
only a very short time
which is faster, spacecraft or space shuttles
Read Para. 3-4 and do some T or F exercises.
( ) 1. Humans need food, water and air to
survive.
( ) 2. Plants can produce oxygen and water
that humans need.
( ) 3. Mars has threes times the gravity of
Earth.
( ) 4. The boots will be fashionable and there
will be different kinds of designs for
settlers to choose from.
T
F
F
T
food
three-eighths of
Part 3 (Para. 5-6)
Advantages of life on Mars
1. People will have ________ space.
2. ________ will do most of our work.
3. We’ll have more time for ________.
4. Students will study in ________ schools.
more
Robots
hobbies
online
Read and fill in the blanks.
Part 4 (Para. 7)
Disadvantages of life on Mars
1. Meals will probably be in the form of
______ and will not be as ________ as they are today.
2. Space travel makes people feel ______ and very ______________.
pills
tasty
ill
uncomfortable
Read and fill in the blanks
Life on Mars
transport
clothes
food
home
school
……
What will be changed on Mars
Life on Mars
Transport
Food
Clothes
Home
School
spacecraft
space shuttles
… too slow to carry …
… take only a very short time …
… travel fast to make people …
… develop plants that will produce …
… in the form of …
Nobody is sure if these plants …
… not as tasty as …
The gravity on Mars is … of …
This may be dangerous because …
The settlers have to wear … to …
... fashionable and … various designs for …
People may live in a … with …
Robots will do … and we will have more …
… a computer connected to …
… at online schools …
No, it isn’t.
Life on Mars will be better in many ways.
However, in some ways, life on Mars may not be better than life on Earth today.
Is life on Mars always better than life on Earth today
Differences between life on Earth and life on Mars
Earth today Mars in 2100
It is polluted and crowded. It is clean and has lots of space.
Spacecraft are slow. Space shuttles travel ____________________.
Gravity is not a problem for us. Only about ______________________ on Earth.
We can wear many types of shoes. People wear _____________.
We do not have much space. People live in _____________________.
We take exams at school. We take exams at ____________.
We have many kinds of food with different tastes. Meals are just ________________.
at half the speed of light.
three-eighths of the gravity
special boots
domes with ten bedrooms
online schools
in the form of pills
1. It is hoped that people could start all over again and build a better world on Mars.
人们有望能够在火星上重新开始,建设一个更好的世界。
all over again
Each time you fail, start all over again.
eg:每次你失败了,就要重新再来。
表示“再,重新”
Language points
2. At present, our spacecraft are too slow to carry large numbers of passengers to Mars.
目前,我们的宇宙飞船太慢了,无法运送大批的乘客去火星。
large numbers of
Large numbers of people go travelling during the National Day.
eg:很多人在国庆期间旅游。
表示“大量的”
= a large number of
3. 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!
随着技术的发展,到2100年,乘坐以光速飞行的宇宙飞船,行程或许只要大约20分钟!
I was second in the race with a time of 14.2 seconds.
介词with短语,在句中常用作状语,表示原因、条件、时间、伴随、方式等。
eg:我以14.2秒的成绩在比赛中位列第二。
at a/the speed of
The car is moving at a speed of 100 kilometres per hour.
eg:小汽车正以每小时100公里的速度行驶。
表示“以……的速度”
4. People would have to wear boots ... to prevent themselves from floating off into space.
prevent...from...(from可省略)
He was prevented from going to school because of illness.
人们将必须穿着特别定制的靴子以免飘进太空。
eg:因为生病,他被阻止进入学校。
=stop...from...(from可省略)
=keep···from...(from不可省略)
表示“阻止,预防某人干某事”。
5. The gravity on Mars is only about three-eighths of that on the Earth. 火星上的重力大约只有地球上的八分之三。
The air on Mars is much thinner than that on the Earth.
在做比较时,我们常用that/those指代句中类似或相同的那一部分。此句中that指代前面的gravity。
eg:火星上的空气要比地球上的空气稀薄得多。
three-eighths 八分之三
分数在英语中通常是借助于基数词和序数词来共同表达的。其中基数词表示分子,序数词表示分母。如:
one-tenth 十分之一
a third 三分之一
注意:①“几分之一”分子除用one外,也可用a。
two thirds 三分之二
four fifths 五分之四
但是,1/2不能说a (one) second, 而要说 a (one) half。1/4和3/4可以说 a (one) fourth 和 three fourths, 但常用a quarter 和 three quarters表示。
②如果分子大于1, 分母要用复数形式。如:
6. Compared with life on the Earth, life on Mars would be better in some ways. 与地球上的生活相比,火星上的生活在有些方面要好些。
Children seem to learn more interesting things compared to/with when we were at school.
compared with…
eg:与我们上学时相比,孩子现在学到的有趣东西似乎更多一些。
表示“与……相比”
此句中的 “compared with the life on the Earth” 为 v-ed短语作状语。
用compare with 和 compare to
的正确形式填空。
He cannot _____________ Shakespeare as a writer of tragedies.
2. You cannot _________ this war _____ the Vietnam war (越南战争).
practice
compare with
compare to
compare ... to
拓展:
eg:莎士比亚把人世比作舞台。
Shakespeare compared the world to a stage.
意为“把……比作……”
7. Life on Mars would be interesting as well as challenging.
火星上的生活,不仅有挑战性,还很有趣。
I want to visit Andrew as well as Martin.
as well as
eg:我想去拜访安德鲁,还有马丁。
She shares (in) my troubles as well as my joys.
她与我同甘共苦。
意思为“不但……而且……”
8. Our own planet, the Earth, is becoming more and more crowded and polluted because of the rapid increase in population. 我们自己的星球, 地球, 由于人口的快速增长, 变得越来越拥挤, 污染越来越严重。
crowded adj. 拥挤的
be crowded with 挤满
polluted adj. 被污染的
pollute pollution
air pollution, noise pollution
rapid是正式用语, 只用作形容词, 语气较强, 常用于表示抽象意义的“快速的”, 如价格涨得快、社会变革快等。
9. It is hoped that people could start all over again and build a better world on Mars.
人们有望能够在火星上重新开始, 建设一个更好的世界。
句型 It is hoped that…表示“……可以指望”, 指说话者希望如此。
e.g. 我们有望在本周前完成此项目。
_____________ we can finish the project before this weekend.
It is hoped that
10. Food would most probably be in the form of pills and would not be so tasty.
食物很大可能会以药片的形式存在,而且味道没有那么可口。
in the form of的意思是“以……的形式”。
e.g. 欢迎以钱的形式资助。
Help _____________ money will be welcome.
in the form of
1. Make a short passage about “Life on Mars”.
2. Read the passages fluently.
Homework