Investigating rate of breathing

What are we trying to find out when investigating rate of breathing?

• The amount of oxygen in the air

• The speed of our breathing

• The total energy our body produced

• The energy used up from physical activities

Which of the following instrument is needed to measure rate of breathing?

• Clock or timer

• Thermometer

• Oximeter

What is the proper method when investigating rate of breathing?

• Count the number of breath we take in two minutes

• Count the number of breath we take in two hours

• Measure the amount of oxygen we breathe in after one minute

• Measure the amount of carbon dioxide we breathe out after one minute

Four students are investigating their rate of breathing. Why did they take 4 readings instead of only using 1 reading?

• To check that everything is correct

• To make the data more accurate

• To calculate the average reading

Calculate the average reading for Aziqah.

(a)  

Two of the students measure their breathing after doing physical activity. Which two students are they?

• Ahmad

• Ali

• Afizah

• Aziqah

How do you know the two students have physical activities before doing the experiment?

• The have larger number

• They breath in more in one minute than the other students

• Their number of breath is lower than the other students

What does this experiment show?

• Different people have different rate of breathing

• Rate of breathing increases after doing physical activity

• Male and female have different rate of breathing

Ali and Aziqah did some physical activity before doing the experiment.

One did some jogging, another did some running for 30 seconds.

Who did the running before the experiment?

• Ali

• Aziqah

How do we know Aziqah did the running?

• Running increases rate of breathing as more air enter our lungs when running

• Running is a heavier physical activity.

  The heavier the physical activity the higher the rate of breathing

• Running causes our heart to beat faster. This causes her rate of breathing to be higher as well