1. “Making Connections” NYSED Lab
The new NYSED monument, possibly?
(LE teacher humor, you wouldn’t understand…)

2. How many times in one minute can you squeeze a clothespin??
Go to:
An interesting take on the entire lactic acid build-up argument.

3. First, Look for a pattern…
Taking your pulse is rather simple. Use the index and middle finger of one hand to palpate (feel) the arterial pulse in your radial artery on your wrist.
Count for 15 seconds and multiply by 4 to determine the number of times your heart beats in one minute.
Pulse Rate
Trial #1 ____X 4 = _____ bpm
Note: The NYSED “Making Connections” Lab measures for 20 seconds and multiplies by 3, but any calculation that leads to a count of 60 seconds is acceptable.

4. Collect “Class Data” and prepare a “histogram” of your results…
Pulse Rate per minute (range of averages)
<51
51-60
61-70
71-80
81-90
>90
Number of students in this range
And now, develop and draw your histogram…
<51
51-60
61-70
71-80
81-90
>90
Average Pulse Rate Range

5. And now, make a hypothesis…
Student A
If you exercise first, then you should be able to squeeze a clothespin more times in one minute.
Student B
If you rest first, then you should be able to squeeze a clothespin more times in one minute.
Explain why…
Explain why…

6. Now, do your “experiment” and collect your data…
3... 2… 1… GO!!! Start
counting the number of
Squeezes for one FULL
minute and record your data.

7. Questions:
In an investigation, 28 students in a class determined their pulse rates after performing each of three different activities. Each activity was performed three times during equal time intervals. The average results are shown in the graph below.
Before constructing the graph it would have been most helpful to organize the results of the investigation in
(1) a research plan
(2) an equation
(3) a data table
(4) a generalization

8. Some students concluded that males always have a higher pulse rate than females. Does the graph support this conclusion? Justify your answer. [1]
When a person exercises, changes occur in muscle cells as they release more energy. Explain how increased blood flow helps these muscle cells release more energy. [1]

9. An increase in heart rate will most likely result in
(1) a decrease in metabolic rate
(2) an increase in pulse rate
(3) an increase in cell division
(4) a decrease in body temperature

10. A student squeezed a clothespin as many times as possible in a 30-second time period. The student repeated this procedure nine more times in quick succession. The data obtained are in the chart below.
State one hypothesis that this data would support concerning the relationship between number of trials and number of squeezes in 30 seconds. [1]

11. On a television talk show, a guest claims that people who exercise vigorously for 15 minutes or more every day are able to solve math problems more rapidly than people who have no vigorous exercise in their daily routine. Describe a controlled experiment that could be conducted to test this claim. In your description be sure to:
• state the purpose of the experiment [1]
• state why the sample to be used should be large [1]
• describe how the experimental group will be treated and how the control group will be treated [2]
• state the specific data to be collected during the experiment [1]
• state one way to determine if the results support the claim [1]

12. A student measures his pulse rate while he is watching television and records it. Next, he walks to a friend’s house nearby and when he arrives, measures and records his pulse rate again. He and his friend then decide to run to the mall a few blocks away. On arriving at the mall, the student measures and records his pulse rate once again. Finally, after sitting and talking for a half hour, the student measures and records his pulse rate for the last time. Which graph below best illustrates the expected changes in his pulse rate according to the activities described above?