张宝

盘山县高中

The Solar systemThe Solar system

• eight planets

WaterWater AirAir LifeLife

?

The differences between the earth and the other planets

Main

body

para 1:

para 2:

para 3:

para 4:

para 5:

A widely accepted ______about the formation of the universe

The formation of the_____

The importance of ______for life The development of _______ _ ____________on the earth

The arrival of _________and their impact on the earth

theorytheory

earthearth

waterwater

plantsplants

animalsanimals

humanshumans

The Big BangThe Big Bang

Do you know some

other ideas about the

beginning of the

universe besides “Big

Bang”?

How did the earth form?How did the earth form?

A cloud of dust

A solid ball

fire and rock

Atmosphere

carbon

nitrogen

vapourother gases

It was full of water on the earthIt was full of water on the earth

Fill in the blanks

Water had also appeared on other planets like_______but, unlike the earth, it had disppeared later. It was not immediately obvious that water was to be _________to the development of life. What scientists believe is that the continued ______ of water allowed the earth to dissovle __________ and _________ into the oceans and seas. This produced a______________ , which made it possible for _____to develop.

Mars

fundamental

presenceharmful gases

acids

a chain reactionlife

The development of life

Put the order of development of life into a timeline.

1.insects and amphibians appear

2.reptiles appear

3.shellfish and other fish appear

4.dinosaurs appear

5.small plants grow on the water

6.plants begin to grow on dry land

7.mammals (including humans )appear

5 3 6 1 2 4 7

Para5:

What problem is caused by human beings?

Global warming

Big BangThe earth

water

Plants in the water

Shellfish and fish

Insects and amphibians

Reptiles

Dinosaurs Mammals

human beings

Retell the passage

If you are the officers of the protecting environment organization ,what measures should you take to prevent the earth from becoming hot?

Discussion:Discussion:

Surf the Internet to find more information about Astronomy

1 why was the earth different from other planets?1 why was the earth different from other planets?A It produced a lot of heat A It produced a lot of heat B The water remained B The water remained C Water disappearedC Water disappearedD It was the oldest planetD It was the oldest planet

2 Why was life able to develop on the earth 2 Why was life able to develop on the earth but not on other planets? but not on other planets?A The earth had a solid shape A The earth had a solid shape B The earth did not have harmful gases in its atmosphereB The earth did not have harmful gases in its atmosphereC The water stayed on the earth but not on other planetsC The water stayed on the earth but not on other planetsD The earth was not too hot but not too coldD The earth was not too hot but not too cold

Choose the best answerChoose the best answer

BB

CC

3 Why was it necessary for plants to grow before animals?A Animals needed plants to protect them from the sun B Plants provided oxygen for animals to breatheC Animals could hide from hunters in forests.D It was easier for plants to grow.

4 What problem is caused by human being?

A They exist everywhere on the earthB They cause global warming C They find new methods of growing cropsD They enjoy hunting and fishing

BB

BB

Thank you very much

Good bye!