1. Astronomy: the science of the stars
Unit 4
Astronomy: the science of the stars

2. Where are we?
Where are we?

3. ---Pluto
---Venus
---Neptune
---Earth
---Mars
---Mercury
---Uranus
---Saturn
---Jupiter

4. How life began on the earth

5. Pangu separates the sky from the earth
Legends about the beginning of the universe in China:
Pangu separates the sky from the earth

6. The Goddess Nuwa created human beings from the clay.

7. it exploded and produced kinds of gases the earth’s atmosphere
Skimming
Read Para 1.2 and find out how the earth and water came out
A cloud of dust
Big Bang
a solid ball
slowly combine
it exploded and produced kinds of gases
the earth’s atmosphere
water
the earth cooled down

8. water forests water Scanning
Fill out the chart: How life began on the earth
water 1.
water
small plants 2.
shellfish and all sorts of fish
11. 3.
green plants on land
10.
small clever animals
4. Insects (on land) 5.
Amphibians 7.
8. dinosaurs (on land) 9.
reptiles
forests 6.
mammals

9. Play a game 1 2 3 4 5 6 7 8 9

10. make watch wonder be cool multiply begin exist explode
Where do we come from? How did the universe __________ ? When we _______ the stars through the telescope, we _________ why the universe ________ . After the “Big Bang” ,the earth ______ just a cloud of energetic dust. Somehow it _________ loudly with fire and rock, which ______ the earth’s atmosphere. As the earth _______ down, water _______ to appear on its surface, which was important for the beginning of life. Then living things __________ on the earth.
begin
watch
wonder
exists
was
exploded
made
cooled
began
multiplied

11. A. Insects. B. Reptiles. C. Dinosaurs. D. Humans.
2.What does “small clever animals” refer to in the passage?
A. Insects B. Reptiles.
C. Dinosaurs D. Humans.

12. 4. What problem is caused by human beings?
A. They exist everywhere on the earth.
B. They caused global warming.
C. They find new methods of growing crops.
D. They enjoy hunting and fishing.

13. 3.What’s the importance of water on the earth?
Water is fundamental to the
development of life.

14. 5.What is the main idea of the text? How life began on the earth.

15. Put the order of development of life into a time line.
insects and amphibians appear
a solid ball
reptiles appear
a cloud of dust
shellfish and other fish appear
dinosaurs appear
small plants grow on the water
plants begin to grow on dry land
presence of water
mammals (including humans )appear D H B A C I G F E J

16. The universe began from ____________.
the big bang
The universe began from ____________.

17. Look at the pictures and tell the groups.
shellfish
plants
fish
mammals
reptiles

18. 9.Why is it wrong in films and stories to show dinosaurs and people together?
Dinosaurs died out long before human beings developed on the earth.

19. Summary
water
Small
plants

20. 7 6 5 4
water
Small
plants 1 3 2

21. 7 6 5 4
1.Early shellfish 3 2

22. 7 6 5 4
2.Some insects 3

23. 7 6 5 4
3.Fish

24. 7 6 5
4.amphibians

25. 7 6
5.Reptiles

26. 7
6.mammals

27. 7.Small clever
animals

28. As students, what little things can we do for the earth?
Discussion
As students, what little things can we do for the earth?

29. What can we do to protect the earth?
solar energy
purify air
plant trees
save water
recycle rubbish
prevent desertification

30. Homework
Suppose you are to design an activity for your school on Earth Day, which is intended to call on teachers and students to protect the earth. Work in groups and choose a reporter of your group to report your work. The following points should be included in the report of your activity.
What the activity is about
Why the activity is designed
When and where to do the activity
Who takes part in the activity
What to be done in the activity

31. Thank you!