LE Quizizz #1 (1920)

The analysis of data gathered during a particular experiment is necessary in order to

• (1) formulate a hypothesis for that experiment 
• (2) develop a research plan for the experiment 
• (3) design a control for the experiment 
• (4) draw a valid conclusion for that experiment

Tags

NGSS.MS-PS1-2

In an experiment to test the effect of exercise on the number of times a clothespin can be squeezed in 1 minute, the dependent variable would be the

• test subject

• amount of exercise

• number of squeezes

• clothespin

An experiment was designed to test whether students could squeeze a clothespin more times in 1 minute after resting or after exercising. What could be a hypothesis for the experiment?

• Do students squeeze clothespins more often in 1 minute after exercising?

• Can most students squeeze a clothespin more times after they rest?

• Ten students who exercise before squeezing a clothespin squeezed it more times in 1 minute than ten students who rested first.

• Students who rest before squeezing a clothespin will squeeze it fewer times in 1 minute than students who exercise beforehand.

An investigation performed to see if there was a relationship between breathing rate and exercise.

In the investigation, the respiratory rates of thirty athletes were measured before any exercise. To measure their rates, they counted the number of times they took a breath in one minute. Then, they ran one lap around the track, and their respiratory rates were determined again.

During this activity, what was the purpose of finding the respiratory rates of the students at rest?

• to determine if the students were healthy

• to practice using the timer

• to use as a comparison

• to use as the variable

Why does a person's heart rate increase during exercise?

• To deliver carbon dioxide to cells faster

• To remove oxygen from cells faster

• To deliver metabolic wastes to cells faster

• To remove metabolic wastes from cells faster

A student designed an experiment to investigate a claim that athletes would have lower heart rates than nonathletes during exercise. To improve the validity of the conclusion reached in this experiment, the students should repeat the experiment

• disregarding any data that don't fit the hypothesis

• with a larger number of athletes and nonathletes

• comparing the heart rates and breathing rates of males and females

• with the athletes doing different exercises than the nonathletes

A student designed an experiment to investigate a claim that athletes would have lower heart rates than nonathletes during exercise. To improve the validity of the conclusion reached in this experiment, the students should repeat the experiment

Which statement is best supported by the data in the chart?

• After exercise, the nonathletic students had a lower heart rate than the athletic students.

• After exercise, the heart rates of the athletic students returned to resting pulse in four minutes.

• During exercise, both groups of students had the same increase above their resting pulse.

• During exercise, the athletic students had a higher heart rate than the nonathletic students.

What is the relationship between intensity of physical activity and pulse rate.

• As intensity increases, average pulse rate increases.

• As intensity increases, average pulse rate decreases.

• There is no relationship between intensity of physical activity and pulse rate.

Look at the graph above. What hypothesis might the scientist be testing.

• How does intensity of exercise affect pulse rate?

• How does pulse rate affect the intenstiy of exercise done?

• As intensity of exercise increases, pulse rate increases.

• A hypothesis cannot be determined by looking at this graph.

What is the independent variable in this experiment?

• Type of Exercise

• Average Pulse Rate

• Number of Students