北师大版（2019）必修第二册Unit5 Humans and nature Viewing Workshop 课件(26张ppt)

(共26张PPT)
U5 Viewing Workshop
How big is the universe
How big is the universe
13.8 billion 93 billion 46 billion
13.8 billion
27.5 billion
How big is the universe
A question: If we say the universe is infinite, why is there a number describing its size
We are going to study the size of ____ universe, which is ….
The first step of solving the problem
What do you learn from the clip
How does he get the number 27.5 billion
What do you learn from the clip
Why is the previous statement wrong
What does the speaker say to give us a sense of scale
Then, how big is the universe
What do you learn from the clip
Now, what about the center of the universe
What do you learn from the clip
So here we are, sitting at the center of our observable piece of the whole universe.
Answer the questions with the information you get.
Questions Observable Universe Whole Universe
1. How big is it ————————————— —————————————
2. Is there an edge ————————————— —————————————
3. Is there a centre ————————————— —————————————
4. Is it getting bigger ————————————— —————————————
….And that in a nutshell is our view from a tower. You are the center of the universe, and so am I, and so is everyone else, and so is no one.
Inspiration
Do you get more insight about the universe Or the problem-solving process
BNDS Science Corner is going to invite a professor to talk about the universe!
Suppose you and your partner are the host and the professor, and you will spread the science about the universe.
Host
Looking at the ______ universe, do you feel _____________________ Have you ever wondered how big it is Today, we are happy to invite Professor xxx to our program to share his understanding and insights about the universe. (applause)
Prof
Thank you! I’m honored to be here.
Host
….. A question for you first. What is the first step of ….
Prof
Host
……
……
..….(cover the important points we’ve learned)
Host
Thank you, professor! I really learn a lot today. Would you please end today’s talk with one of your inspirations about this topic
Requirements
Work in pairs to explain the question in a clear way;
Cover the important points you’ve learnt today.
Use comparison when necessary;
Host
Looking at the ______ universe, do you feel _____________________ Have you ever wondered how big it is Today, we are happy to invite Professor xxx to our program to share his understanding and insights about the universe. (applause)
Prof
Thank you! I’m honored to be here.
Host
….. A question for you first. What is the first step of ….(Step 1)
Prof
Host
……
……
..….(cover the important points we’ve learned)
Host
Thank you, professor! I really learn a lot today. Would you please end today’s talk with one of your inspirations about this topic
More exploration is on the way