science+experiement

OBSERVE: Pull down slowly on the stretched balloon. What happens to the balloon inside the cup? When you pull down on the balloon the balloon filled up with air or expanded.

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

The balloon stays flat with no air.

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

IDENTIFY: When you pull the large balloon down, what fills the extra space in the cup? I think Oxygen fills the spaces when you pull down on the balloon.

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 in your lungs is similar to the air pressure in your lungs because they both are in tight in closed spaces and have mussels { or the balloon on the bottom] to help them expand. Elizabeth, this question requires some deep thinking on your part. Is the air pressure increasing or decreasing at certain times? When does it increase? When does the pressure decrease? How does this compare to the air pressure in your lungs? When you breathe air into your lungs, what is happening in regards to the pressure?