How+Breathing+Works+Investigation+19

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

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

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

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