Investigate+what+makes+you+breathe+12

OBSERVE: Pull down slowly on the stretched balloon. What happens to the balloon inside the cup? The balloon inside the cup inflates when you pull down on the stretched balloon. Push up on the stretched balloon. What happens inside the cup? The air in the cup escapes. This causes the balloon to inflate. Maiya, I would encourage you to rethink this answer. You are welcome to borrow one of the models and repeat this step.

The air inside the cup is forced closer to the small balloon, making the air inside the small balloon leak out through the straw. This is caused because of the presure the air in the cup is putting on the small balloon. EVALUATE: Is there more or less space inside the cup when you pull down on the large balloon? More space because the space the balloon was taking up is now free. Which balloon are you referring to? The large balloon across the bottom of the cup or the little balloon inside the cup? More space because the the __large__ balloon was taking up is now free. IDENTIFY: When you pull the large balloon down, what fills the extra space in the cup? When you pull the large balloon down, air fills the extra space.

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. The air pressure is similar because when you pull the large balloon down its like your breathing in. When you push the large balloon up, it's like you exhaling. I think your lungs expand when you breathe air into your lungs.

Excellent thinking in response to this question. Great job!