Making Connections State Lab

In the lab activity Making Connections, an experiment was designed to test the effect of exercise on the ability to squeeze a clothespin. The number of times the clothespin was squeezed served as the

• independent variable

• dependent variable

• hypothesis

• control

Students were asked to design a lab that investigated the relationship between exercise and heart rate. Heart rate was determined by recording the pulse rate in beats per minute. The students hypothesized that increased exercise results in an increased heart rate. The class results for the experiment are shown in the graph. Students in a different science class carried out the same experiment. The data they obtained did not support the hypothesis that increased exercise results in increased heart rate. The most scientifically sound way to deal with this situation is to

• write a new hypothesis

• read about pulse rate in a biology textbook

• have the students in both classes vote to decide which hypothesis is correct

• ask students in a third class to do the experiment and see if their results support the hypothesis

Tags

NGSS.MS-ETS1-1

The student stated that data from his experiment supported his claim that pulse rate increases when watching an exciting sporting event. State an argument for why someone might not accept his claim. According to the data table in the picture, does the student’s pulse rate fall within the normal range? Yes or No and support your answer.

• Yes, It falls in the range for people older than 14.

• No, — because his heart rate is below the range for his age group

• Yes, His rate of 60 beats per minute puts him in the adult range.

What was the student’s resting pulse rate in beats per minute?

• 160 beats/min

• 100 beats/min

• 80 beats/min

• 69 beats/min

The student stated that data from his experiment supported his claim that pulse rate increases when watching an exciting sporting event. State an argument for why someone might not accept his claim.

• All variables were controlled

• The claim may not be accepted because the student did not take pulse rates before the game started.

• The claim would not be accepted because the student used a large sample size of only six individuals

• The claim would not be accepted because the student repeated his experiment, in order to have a larger sample tested.

Tags

NGSS.MS-LS2-4

Students were asked to design a lab that investigated the relationship between exercise and heart rate. Heart rate was determined by recording the pulse rate in beats per minute. The students hypothesized that increased exercise results in an increased heart rate. The class results for the experiment are shown in the graph.

Which statement is best supported by the graph?

• Before exercising, the average pulse rate was 65; four minutes after exercising, the average pulse rate was 65.

• After four minutes of exercising, the average pulse rate was 120; two minutes after exercising, the average pulse rate was 120.

• While exercising, the highest average pulse rate was 150; before exercising, the average pulse rate was 65.

• Two minutes before exercising, the average pulse rate was 80; after two minutes of exercise, the average pulse rate was 140

Identify the substance/molecule that will not diffuse.

• Starch

• Glucose

• Iodine

Tags

NGSS.MS-PS1-2

Identify the substance(s)/molecule(s) that will diffuse.

• Starch

• Glucose

• Iodine

Tags

NGSS.MS-PS1-2

In the Making Connections State Lab, what is the primary purpose of using a clothespin in the experiment?

• To measure grip strength

• To test reaction time

• To evaluate endurance

• To assess flexibility

Which variable is manipulated in the Making Connections State Lab to observe its effect on clothespin squeezing?

• Time of day

• Amount of exercise

• Type of clothespin

• Room temperature

Tags

NGSS.MS-PS2-2