Mini-Quiz: Fluid Pressure

1. About how much pressure does your brain exert on your skull?

   14.7 pounds per square inchThat is correct. You are becoming an expert in fluids. There is no pressure inside the skullSorry, not correct. Try another button. There is no brain inside my skullGood try, but not right. Select another answer.

2. Why do your ears sometimes pop when flying in an airplane?

   Increased air pressure at high altitudes cause the poppingSorry, not correct. Try another button. Cheap headsets cause them to popOops! Wrong answer. Re-read the question and try again. Your body is compensating for the decreased air pressureCorrect. Your knowledge is increasing.

3. What would happen if you put a balloon in the refrigerator?

   It would get smaller due to increased internal pressureGood try, but not right. Select another answer. It would get larger due to reduced internal pressureOops! Wrong answer. Re-read the question and try again. It would get smaller due to reduced internal pressureThat is correct. You are becoming an expert in fluids.

Pick an answer to see instant feedback. Re-read the lesson if you miss one.