lungs+expeiriment

OBSERVE: Pull down slowly on the stretched balloon. What happens to the balloon inside the cup? Answer #1.When you pull down on the bottom, the balloon inside the cup inflates.

Push up on the stretched balloon. What happens inside the cup? Answer #2. When you push up, the balloon deflates.

EVALUATE: Is there more or less space inside the cup when you pull down on the large balloon? Answer #3. There is more space in the balloon because when you pull down, it makes a dip.

IDENTIFY: When you pull the large balloon down, what fills the extra space in the cup? Answer #4. Air fills the extra space since no liquid or any other gas can enter(since the balloon was put on with air in 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. Answer #5. 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. How is the air pressure similar?

Trevor, your responses are well-thought out and very thorough. Thank you for a job well done.