Breathing+experiment14

OBSERVE Pull down slowly on the stretched balloon. What happens to the balloon inside the cup?

Answer #1 When you pull the bottom part of the cup down, the balloon inflates.

Push up on the stretched balloon. What happens inside the cup?

Answer #2 When you pull the bottom part up it deflates.

EVALUATE: Is there more or less space inside the cup when you pull down on the large balloon?

Answer #3 If you pull down the balloon you eventually have more room then you have less room.

IDENTIFY: When you pull the large balloon down, what fills the extra space in the cup?

Answer #4 Air fills the extra space since no liquid can or any other gas can enter (since the larger balloon was put on with air in cup.)

COMPARE: How is the air pressure in the balloon similar to the air pressure in your lungs? Write down what you think happens when you breathe air into your lungs. Answer #5 The balloon is similar to lungs because when lungs expand for breath, extra space is added, and air enters through the bronchial tubes makes the lungs expand like the balloon. Matt, do the lungs expand first and then create extra space or is extra space created first which allows the lungs to expand?