7.Science+how+you+breathe+23

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

What do you mean it breathes in? Can a balloon breathe?

Push up on the stretched balloon. What happens inside the cup? It starts to move out. What does that mean? Be more descriptive.

EVALUATE: Is there more or less space inside the cup when you pull down on the large balloon? There is less space in the cup from the balloon.

IDENTIFY: When you pull the large balloon down, what fills the extra space in the cup? It fills with carbon dioxide and oxygen.

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. It just goes in and out.

Sydney, your answers are not specific enough and required a bit more thinking on your part.