Unit4Reading(2)-九年级英语下册课件(共34张PPT)

(共34张PPT)
九下 Unit 4 Reading (2)
3月19日下午第2节九年级英语
Why do people want to
move to Mars
population
a large number of
more and more crowded
It is still increasing rapidly .
increase
increasing
the rapid increase in population
The earth is becoming
more and more crowded
(拥挤的) and polluted (污染的).
There are large numbers
of people on Earth.
The color of Mars:__________
red
Mars
the surface of Mars
The surface of Mars is a little like the surface of the Earth.
Move to another planet.
Let’s start all over again
and build a better world.
Dr. Ming is worrying about not having enough water on Mars.
Do you think he worries too much
Eddie enjoys eating very much. Will he like the life on Mars
1. Nobody knows whether there would be enough w______ or o___________ on Mars
2.Scientists are not sure whether p______ will grow on Mars.
3. Food would most probably be __________________.
ater
What could we eat on Mars
山谷和溪流证实火星上曾存在水？
xygen（氧气）
lants
in the form of pills
Tom says: “I can jump much higher on Mars than on the Earth.” Do you agree with him Why
The gravity on Mars is only about three e______(3/8 )
of that on the Earth.
Gravity
ighths
helmet
special boots
space suit
What should we wear on Mars？
1.There is less ________on Mars than on the Earth.
2.We could jump e____ and f____ into space.
3. Humans have to wear s_____ boots to make themselves heavier.
4. The boots are s_______ designed to p______ themselves from f_______ off into space.
asily
loat
pecial
gravity
revent
pecially
laoting
1. At present our spacecraft are too s to c large numbers of people.
2. With the development of technology, the spacecraft can travel at the speed of l .
3. The journey to Mars might only take 20 m_____.
low
arry
ight
How can we get to the Mars
imutes
spacecraft
宇宙飞船
passengers
Where will we live on Mars
Live in houses with large comfortable rooms
huge
Robots would do most of the housework.
Every student would have a computer at home.
The computer will be connected to an interplanetary network.
Where would we study on Mars
at a real school
at an online school
Every student would have a computer at home
connected to an interplanetary network.
Advantages of living on Mars
It’s not _________or________.
The ________ is more convenient .
People will wear special _____
People will have ______space .
______ will do most of our work.
We’ll have more time for_______.
Students will study in ______ schools.
crowded polluted
transport
boots .
more
Robots
hobbies
online
Disadvantages of living on Mars
Low _______ will be dangerous.
Food does not taste _____.
Space travel makes people feel ________.
It’s too ________to stay outside.
It’s too ______ away from friends on Earth.
gravity
good
ill / sick
cold
far
Differences between life on the Earth and life on Mars
Earth today Mars in 2100
Polluted and crowded
Spacecraft are slow
Gravity is not a problem for us
People can wear many types of shoes
People do not have much space
we take exams at school
we have many different kinds of food
clean and has lots of space
Space shuttles are very fast
It has only 3/8 of the gravity of the Earth
We must wear special boots
We have more space
In online schools
Food will be the pills
Life on Mars would be not only interesting but also challenging.
We should try our best to protect our earth.
We should study hard to get enough knowledge for the research work in the future.
1. 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。
Language points
Large numbers of 表示“大量的”
= a large number of
Large numbers of people go travelling during the National Day holiday.
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!
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。
我以14.2秒的成绩在比赛中位列第二。
By the time I got to the station the train had already gone.
by 表示“到...为止，截止... ”
等我到达火车站时，火车已经开走了。
at a/the speed of 表示“以……的速度”
The car is moving at a speed of 100 kilometres per hour.
小汽车正以每小时100公里的速度行驶。
3. 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.
火星上的空气要比地球上的稀薄的多。
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：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。
如果分子大于1， 分母要用复数形式。如：
4. 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 with when we were at school.
compared with… 表示“与……相比”
此句中的 “compared with the life on the Earth” 为 v-ed短语作状语。
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。
拓展：
compare ... to 意为“把……比作……”。
Shakespeare compared the world to a stage.
莎士比亚把人世比作舞台。
4. 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 意思为“不但……而且……”
我想去拜访安德鲁，还有马丁。
She shares my troubles as well as my joys.
她与我同甘共苦。
以药片的形式
没有他们美味的
很多人
变得越来越拥挤的
和受污染的
目前
直到2100年
太慢而不能做某事
以光速的一半速度
漂走到太空中
从…中间选择
八分之三
一座带有十间卧室的屋子
被连接到行星间网络的电脑
in the form of pills
not as tasty as them
large numbers of people
become more and more
crowded and polluted
at the moment/at present/now
by the year of 2100
too slow to do sth.
at half the speed of light
float away into space
choose from
three-eighths
a house with ten bedrooms
a computer connected to an
interplanetary network
The earth is our home,
we should protect the earth,
keep the earth clean
and make our earth
more and more beautiful!
同学们，这节课我们就上到这儿。接下来请大家完成课堂作业。请仔细审题，认真思考，工整书写，规范答题，提高准确率，充分展示这一节课的学习收获吧！