Respiration
WHAT IS RESPIRATION?
• Breath is oxygen,
breath out CO2
WHAT MIGHT AFFECT HOW MUCH WE BREATH?
Which of these factors
can we easily test in the
classroom?
• CO2= acidic
BROMOMETHYL BLUE PH TEST• Oxygen = basic
HOW CAN WE TEST HOW EXERCISE
AFFECTS RESPIRATION?
• Time how quickly
color changes to
measure change
in respiration
WHAT IS YOUR HYPOTHESIS?
If a person exercises and blows into a
bromomethyl blue solution, then the
bromomethyl blue will ___________________
color ____________________, because
respiration is occurring at a
____________________ rate.
WHAT HAPPENED?
• Bromomethyl blue solution changed color
faster after exercise
• Respiration rate increased due to physical
activity
• More activity, more oxygen needed
• Cause- physical activity
• Effect- increase breathing (oxygen intake)
WHY DO YOU NEED MORE
OXYGEN WHEN EXERCISING?
• Physical activity requires ENERGY
• Oxygen is needed to produce ATP (energy for the
cells)