Breathing+investigation+17

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

A: The balloon expands or more air gets into the ballon when you pull on the bottom of the cup, because when you pull it down, air is forced and sucked into the balloon, because of the straw and the clay on letting air only go into the balloon.

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

A: Air is sucked out of the balloon because your finger is sucking it out when you push. So that also means that the balloon's air leaves it because of the cup being sealed and the balloon has no air left. Can your finger suck air out of a balloon? Rethink this response.

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

A: More space is created because when you pull down on the big balloon you are taking the big balloon with you and so there is more space for air to be added, making the balloon and the cup have more air in side it.`

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

A: Oxygen and air is what goes into the cup through the straw when you pull the large balloon down. When you push the large balloon upwards Oxygen and air leaves the premises, or the cup, depending on how hard you push or pull depends on much air is added or removed from 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.

A: When you breathe in air it is like the small balloon gets bigger because your lungs are sucking in Oxygen when you breathe. Depending on how hard you breathe depending on how much air and Oxygen is sucked into your body. When you breathe out you are getting rid of the wastes that your body doesn't need from your lungs, witch makes them shrink, if you are sitting down they srunch together, when you let out those wastes that is called exhaling.

Actually, your lungs don't "suck" in air; they fill with air due to the change in pressure.