Question

part a
first, formulate a question to answer through scientific investigation. keep in mind that you should be able to answer your question with measurable data. write your question here.
how does the duration of running (in minutes) affect the heart rate (in beats per minute) of person?
space used(includes formatting): 105 / 30000
part b
write your plan for the experiment. note the dependent and independent variables. to ensure that your results test only the dependent variable, consider how you will control outside factors.

Explanation:

Part A

The question is about how running duration (measurable) affects heart rate (measurable), suitable for scientific investigation. It has a clear independent (running duration) and dependent (heart rate) variable with measurable data.

1. Independent Variable: Running duration (minutes, e.g., 0, 5, 10, 15, 20 minutes).
2. Dependent Variable: Heart rate (beats per minute, measured after each running duration).
3. Control of Outside Factors:

• Use the same person (to control fitness level, age, etc.).
• Run at a constant intensity (e.g., same speed on a treadmill).
• Measure heart rate immediately after each run duration in a quiet, consistent environment.
• Repeat trials (e.g., 3 times per duration) to reduce error.

1. Experiment Plan:

• Baseline: Measure resting heart rate (0 minutes of running).
• Run for 5 minutes at constant intensity, measure heart rate.
• Repeat for 10, 15, 20 minutes.
• Record data, analyze trends (e.g., graph heart rate vs. duration).

Answer:

How does the duration of running (in minutes) affect the heart rate (in beats per minute) of a person?

Part B