How+breathing+works

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

When I pulled downthe balloon inflated.

Push up on the stretched balloon. What happens inside the cup? When I pushed the balloon deflated.

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

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

Air pressure fills it.


 * //__Can pressure fill something or do you think something else is filling the extra space? Rethink this response.__//**

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.

When you breathe air your diaphragm contracts and pulls down which takes air in. Then when you breathe out your diaphragm relaxes.

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 * //__Explain the air pressure comparison.__//**