Lesson 38 The World is a Big Place课件 (共26张PPT)2023-2024学年冀教版八年级英语下册

(共26张PPT)
Unit7 Know Our World
mountains
rivers
deserts
glaciers
.
Lesson 38: The World Is a Big Place!
The earth is a very special planet. It is big and beautiful. But it faces many problems.
7 billion in total
One problem
The population is increasing very quickly.
Another problem
Can we live anywhere on the earth
People can’t live everywhere on the earth.
71%
29%
Only one third of our planet is land.
Oceans cover two thirds of the earth’ surface.
one third 三分之一
two thirds 三分之二
分子基数词，分母序数词，分子大于一，分子加s。
For example one fourth 四分之一
two fourths 四分之二
Exercises
1.One fourth of the students ________(be) from the countryside.
2. Two fifths of the water ___(be) clean.
are
is
How many continents are there in the world
What are they
Think About It
North America
South America
Europe
Africa
Asia
Australia
Antarctica
Antarctica is covered with snow and ice all year round
Luckily,people can live on the other six continents
the Arctic Ocean
the Pacific Ocean
the
Atlantic Ocean
the
Indian Ocean
Which ocean is the largest one
The earth is our home,and it will be our home in the future. It must be treated well for our children and for our children’ children,too.
1.These dry places are called deserts.
2.Antarctica is covered with snow and ice all year round.
3.It must be treated well for our children and for our children’s children,too.
be done 被动语态
1.They make shoes in that factory.
主语+ 谓语 +宾语
Shoes are made (by them) in that factory.
一般现在时：
变为被动语态
主语+am/is /are +done
2. They bought ten computers last term．
Ten computers were bought (by them) last term.
一般过去时：
主语+was/were +done
3.They will finish the work in ten days.
The work will be finished (by them)
in ten days.
一般将来时：
主语+ will+be+done
Let’s Do It!
Read the lesson and match each paragraph with its main idea.
Paragraph1
a. Six of the seven continents are good for people to
live on.
Paragraph2
b. We should treat the earth well.
Paragraph3
c. An increasing population is a big problem for the earth.
Paragraph4
d. Two thirds of the earth is covered with oceans.
Paragraph5
e. People cannot live everywhere on the earth.
pollutions
The increasing population
As a student, what should we do
We should pick them up and put them into the dustbin.
We should turn off the taps when we don’t use them.
Let’s take actions together to make our school more and more beautiful.
Let’s protect our home together.
Homework
1. Share with your partner about what you feel after learning.
2. Finish the exercise.