Lung+Expierment4

OBSERVE: Pull down slowly on the stretched balloon. What happens to the balloon inside the cup? The balloon inflates with air since there is extra space within the cup.

Push up on the stretched balloon. What happens inside the cup? The balloon's air from when it was pulled down deflated because space was lost.

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 because the area of the balloon part on the bottom is removed.

IDENTIFY: When you pull the large balloon down, what fills the extra space in the cup? Air fills the extra space since no liquid can or any other gas can enter (since the large balloon was put on with air in 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. The balloon is similar to lungs because when lungs expand for breath, extra space is added, and air enters through the bronchial tubes which makes the lungs expand like the balloon. Actually, the chest cavity expands which allows air to flow into the lungs and force them to expand.