English singsing
Fun Science
Fly away, balloon!
Haha, John. The balloon won’t fly away like that.
Huh?
The balloons flew away with a house in the cartoon.
Those balloons were probably filled up with helium gas.
You are exhaling carbon dioxide.
Carbon dioxide is heavier than oxygen, so your balloon will not fly.
Oh! So, is helium lighter than oxygen?
That’s right!
Oh, I see. I thought balloons would always fly in the sky!
Oh!
I’m completely soaked!
Roy, does it rain on the moon?
The moon does not have air or water, so it never rains.
Aha! And everything in space floats.
So will my balloon be floating in space too?
Well, your balloon contains air that you blew in, and the moon is in a vacuum state.
What do you think will happen?
Well? Will it shrink?
No, think more.
Hm… BOOM?
That’s right! BOOM!
There is a difference in pressure between outside and inside of the balloon,
so the balloon gets bigger to equalize the pressure outside.
Later, it will explode!
Oh, my goodness! My balloon!
People wear spacesuits for this reason.
Astronauts wear spacesuits to protect their bodies!
Oh, I didn’t know that.
I thought astronauts in spacesuits were just trying to look nice.
Wow! Science is always mysterious! It’s so fun!
John, didn’t you say you want to be an astronaut?
That’s right!
I want to be an astronaut.
Alright. I think going to our next class is what we have to do right now.
Oh, no! It’s time already!
Let’s go!