Making Connections

Front

Independent variable in an investigation on the effect of exercise on clothespin squeezing rate.

Back

exercise

Front

An investigation is carried out to determine the effect of exercise on the rate at which a person can squeeze a clothespin. How can the experimental results be made more valid?

Back

increasing the number of students

Front

Dependent variable in an experiment to determine the effect of exercise on the rate of squeezing a clothespin.

Back

number of times the student was able to squeeze the clothespin

Front

Which activity most likely corresponds to the pulse rate of the person while sleeping?

Back

3

Front

A student counts 23 beats over 20 seconds. In which row should the pulse rate be recorded?

Back

B

Front

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

Back

69 beats/min

Front

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

Back

dependent variable

Front

During periods of vigorous physical activity, a person's breathing and heart rates increase. This enables the cells of the body to perform more efficiently because it helps the cells to

Back

remove waste products faster

Front

According to the Data Table, at what hour was the person's heart rate the lowest?

Back

5

Front

Relationship between intensity of physical activity and pulse rate.

Back

Running has the highest pulse rate.