(共9张PPT)
Viewing Workshop P42
新北师大必修Book 2
Unit 5 Humans and Nature
Universe
When you see “universe”, which word
came to your mind
Pre-viewing
What do you know about the universe Complete the quiz with the right numbers.
1
13.8 billion 27.5 billion 46 billion
1 The universe is about ____________
years old.
2 The observable universe is about
___________ light years across in
diameter.
3 Today the distant objects like stars
that we can observe are a bit more
than __________ light years away.
13.8 billion
93 billion
46 billion
While-viewing
How big is the universe
This video provides the answer to the
frequently-asked question about the universe.
Watch the first part of the video. Check your predictions from Activity 1.
2
Watch the rest of the video.
Complete the table.
3
Questions Observable Universe Whole Universe
2 Is there an edge
3 Is there a centre
4 Is it getting bigger？
1 How big is it
The observable
universe is about
93 billion light years
across in diameter.
Yes. Temporal edge.
Yes. Earth / you.
Yes.
Infinite.
Yes.
Yes.
No.
Pair Work
Watch the whole video again.
Discuss the questions.
4
What is the Earth compared to Is the comparison
useful in understanding the infiniteness of the universe
What methods does the presenter use to enable viewers to understand this piece of knowledge in physics
The size of the Earth within the observable universe is roughly equivalent to the size of a virus within the solar system. That does not help much, because we cannot really appreciate the incomprehensible smallness of a virus nor the bewildering bigness of our solar system either.
The presenter provides comparisons that are relative to our knowledge.
What have you learnt about the size of the universe Find more information online
and share with the class.
5
Post-viewing
Express Yourself
Thank you!
