1. Unit 4 Astronomy: the science of the stars
Listening & Speaking
南昌二中 涂宇

2. Isaac Newton
Steve Jobs

3. Gravity
the Pull from the earth 3

4. How much do you know about gravity?
competition
How much do you know about gravity?

5. F
There is no gravity on the moon.

6. An apple has a stronger gravity than a pencil.

7. F
If superman gets too hungry to fly while traveling in deep space, he will fall back to earth.

8. Your electronic watch goes slower on the moon than on the earth.F

9. Superman can not escape from black hole.

10. New Words
object

11. float
edge

12. New Words
gravity
pull
object
edge
float 重力
拉, 拖 物体 边缘 漂浮

13. √ Task one Which is the best summary of the text?
The text is about how these scientists wanted to find out about the beginning of the universe.
The text is about how the idea of gravity has developed over a long period of time.
The text is about the importance of three scientists and their work.
2. How many physicists are mentioned? √

14. Gravity
Isaac Newton
Albert Einstein
Stephen Hawking

15. Summary Black holes pulls further slower edge stronger Isaac Newton
Albert Einstein
Stephen Hawking
Idea
Development
In space large objects make space and time bend; the larger the object, the _______ space and time bend.
Large bodies have a force which _______things towards them
Black holes
___________have a very large mass and pull things towards them.
Summary
pulls
further
slower
The bigger the object, the _________ the gravity.
Time goes _____ in very strong gravity.
If you cross over the ______, you cannot get out, but if you do not, you may be able to escape.
edge
stronger

16. THEORIES OF GRAVITY
Michael Jones of the New Space Magazines is talking with space traveller Li Yanping about changes in the theory of gravity.
Part 1
MJ:Hello,Dr Li Yanping.It's so good of you to talk to me.Some students ask us why things always fall back to earth if you throw them up in the air.Could you explain it?
LY:Well,at first people thought it was because the earth was the center of the universe.Of course that was wrong.One day Isaac Newton watched an apple fall to the ground.He said that something else must be pulling the apple back to earth.He called it"gravity".
MJ:I see.Did people accept his idea?

17. LY:They did.Later they worked out that bigger objects(like the sun)have stronger gravity than smaller objects(like our planets).If you're travelling in deep space,you couldn't fall back to the earth.You're just too far away.
Part 2
MJ:Does it mean there's no gravity in space?
LY:No.In a sapceship you would feel the pull as it got closer to such an object.You would trave faster and faster towards it.
MJ:Until you hit it?
LY:Not exactly.You may pass it very fast and then it would throw you out into space again.After that you would slow down to the usual speed.
MJ:How do you know this?

18. LY:In 1905 Einstein said that in space large objects
make space-time bend;the larger the objects,the
further space-time bends.So time goes slower in
very strong gravity.
MJ:What aout black holes?
LY:That's a place in space which has such a strong
mass that nothing can escape from its gravity.There is a kind of edge around this mass.If you cross over this edge,it’s impossible for you to get back.However , if you don’t cross this edge,you can still escape.Stephen Hawking has done a lot of research into black holes.He has shown that they "spit"things out as well as "eat"them.

19. Black holes have a very large mass and pull things towards them.
Stephen Hawking
超链接视频

20. Task Two
If one object moves towards the “black hole”, what would happen?

22. Observation: __________ Feeling: ______________
Journey log
Approaching the “ black hole”:
Observation: __________
Feeling: ______________
Spaceship jumped:
Observation: __________
Feeling: ______________
Spaceship jumped again:
Observation: __________
Feeling: ______________
New discovery:
_____________________

23. Approaching the Black hole:
Observation: We could see some ___________ around what looked like an ___________.
Feeling: We watched with ___________________ at the lights.
faint lights
empty space
interest and amazement

24. Spaceship jumped again:
Observation: The gravity of the “black hole” was _________________________.
Feeling: I felt rather_____ and my mouth _______and I closed my eyes.
Spaceship jumped again:
Observation: This time it moved _________ and __________________ of the “black hole”.
Feeling: We felt_________.
pulling us into its “mouth”
sick
went dry
sideways
away from the edge
nothing

25. New discovery:
If you go inside the edge of a “black hole”, it will___________and ___________________; but if you do not, you may _____________________________.
“eat” you
there is no escape
have an opportunity to escape

26. Task 3 Interview: do an interview about this trip
one group member as an astronaut
Task 3
the others as journalists

27. Oh no no!! It was pulling us into it!!
Guys, look! There are so many beautiful faint lights!
………. …
Amazing! It looked like an empty space.
Role play: suppose you are astronauts in the spaceship, act out what you experienced in the trip according to the journey log!

28. Useful sentence structures
Thank you so much for coming to talk to us today about….
Would you please tell us about your …?
What does it feel like in ..?
Did you feel afraid? / What surprise you?
Would you like to go into space again?
You would feel…

29. Speaking activity

30. Homework

31. Thank you!