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Video

Lab Report

Title:  The Effect of Depth on Respiration Rate of Scuba Divers 



Problem StatementHow does breaths per minute from a compressed air source change as a diver goes deeper underwater?



Materials


3 laminated reading passages

3 quizzes on readings on waterproof paper

1 white dry erase board

2 large paper clips

1 pencil

Optional: 1 camera (Mr. Harlan filming underwater)



Method


Step 1:We give a passage and quiz to the subject, and ask them to read the passage at 1 ft.  We will count how many times the subject exhales by counting the bubble masses. One of us will pretend to check their answers while the other keeps counting bubble masses.


Step 2: We give them a new passage and quiz and ask them to complete the same task at 8 ft. We will count how many times the subject exhales by counting the bubble masses. One of us will pretend to check their answers while the other keeps counting bubble masses.


Step 3: We give them a new passage and quiz and ask them to complete the same task at 17 ft. We will count how many times the subject exhales by counting the bubble masses. One of us will pretend to check their answers while the other keeps counting bubble masses.


We repeat steps 1-3 with two other subjects

    We believe that the breathing rate at each depth will be the same.  We have found out that the regulator delivers the same pressure air to our lungs as the pressure in the water at the depth of the regulator.  Even though the air is thicker that you are breathing in, your lungs are being pushed in at the same pressure that the air is being delivered so they cancel each other.  We chose 12 BPM because the average  breathing rate is 12-15 and our subject’s lungs are smaller than average because they are not fully grown.

BPM=Breaths per minute

Hypothesis

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