results:
question | answer
1. which activity gave you the slowest pulse rate? (1 pt)
2. which activity gave you the quickest pulse rate? (1 pt)

conclusion:
question | answer
3. which of the procedures did you use as a control in this experiment? (1 pt) remember what controls are used for
4. what was the independent variable in this experiment? (1 pt)
5. what was the dependent variable in this experiment? (1 pt)
6. what are some possible sources of error in this experiment? (1 pt)
7. why do you think everyone’s pulse is a little different? (1 pt)

Question

results:
question | answer
1. which activity gave you the slowest pulse rate? (1 pt)
2. which activity gave you the quickest pulse rate? (1 pt)

conclusion:
question | answer
3. which of the procedures did you use as a control in this experiment? (1 pt) remember what controls are used for
4. what was the independent variable in this experiment? (1 pt)
5. what was the dependent variable in this experiment? (1 pt)
6. what are some possible sources of error in this experiment? (1 pt)
7. why do you think everyone’s pulse is a little different? (1 pt)

Accepted Answer

To answer these questions, we need to assume that this is a pulse - rate experiment where different activities (like resting, walking, running, etc.) were performed, and pulse rates were measured. Here are the general answers based on typical pulse - rate experiments:

### Question 1
# Brief Explanations:
In most cases, when a person is at rest (for example, sitting or lying down without any physical exertion), the body's demand for oxygen is low. The heart doesn't need to pump blood as fast to supply oxygen to the tissues. So, the resting activity usually results in the slowest pulse rate.
# Answer:
Resting (or the specific non - active activity done in the experiment, e.g., sitting quietly)

### Question 2
# Brief Explanations:
Activities that require a lot of physical effort, such as running or intense exercise, increase the body's demand for oxygen. To meet this increased demand, the heart has to pump blood more rapidly, which leads to a higher pulse rate. So, the most physically demanding activity (like running) in the experiment will give the quickest pulse rate.
# Answer:
The most physically strenuous activity (e.g., running, jumping jacks - depending on the experiment)

### Question 3
# Brief Explanations:
A control in an experiment is used as a baseline for comparison. In a pulse - rate experiment, the resting state (when the person is not doing any activity) is often used as the control. This is because we can compare the pulse rates during other activities (the experimental groups) to the resting pulse rate to see how the activities affect the pulse.
# Answer:
The resting state (or the activity with no physical exertion, e.g., sitting still)

### Question 4
# Brief Explanations:
The independent variable is the factor that is changed or manipulated in an experiment. In a pulse - rate experiment, the activity performed (like resting, walking, running) is the independent variable because we choose which activity to do to see its effect on the pulse rate.
# Answer:
The activity performed (e.g., type of physical activity: resting, walking, running)

### Question 5
# Brief Explanations:
The dependent variable is the factor that is measured and depends on the independent variable. In this experiment, the pulse rate is what we measure, and it depends on the activity (the independent variable) that is being done.
# Answer:
Pulse rate (number of heartbeats per minute)

### Question 6
# Brief Explanations:
There are several possible sources of error. If the pulse is measured by counting the beats over a short period (like 15 seconds and then multiplying by 4), human error in counting can occur. Also, if the person is not completely still during the resting measurement or if the time - keeping device (like a stopwatch) is not accurate, it can lead to errors. Another source could be the person's emotional state during the experiment (if they are nervous, it can affect the pulse rate even if the activity is the same).
# Answer:
- Human error in counting heartbeats.
- Inaccurate time measurement (e.g., stopwatch not precise).
- Subject's emotional state affecting pulse.
- Inconsistent measurement conditions (e.g., different postures during measurement).

### Question 7
# Brief Explanations:
Everyone's pulse is a bit different due to various factors. Genetics play a role - some people may have a naturally slower or faster heart rate due to their genetic makeup. Fitness level is also important; a person who exercises regularly (has a higher level of cardiovascular fitness) will generally have a lower resting pulse rate. Body size and composition can also matter, as well as underlying health conditions (like thyroid problems which can affect heart rate).
# Answer:
- Genetic differences (inherited heart rate tendencies).
- Fitness level (more fit = often lower resting pulse).
- Body size/composition.
- Underlying health conditions (e.g., thyroid disorders).

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