The Scientific Method Review

The measurable factor in an experiment is known as the _______________.

• IV

• DV

• CG

• EG

A student decides to set up an experiment to see if detergent affects the growth of seeds. She sets up 10 seed pots. Five of the seed pots will receive a small amount of detergent in the soil and will be placed in the sun. The other five seed pots will not receive detergent and will be placed in the shade. All 10 seed pots will receive the same amount of water, the same number of seeds, and the same type of seeds. She grows the seeds for the two months and charts the growth every 3 days. What is wrong with this experiment?

• There are too many IVs

• There are too many Das

• There are too many constants

• There is no way to draw a conclusion

In a controlled experiment, the variable that you change to test the hypothesis is called the ______________.

• Controlled Varible

• Responding Variable

• Independent Variable

• Dependent Variable

A student has a 50 pound wagon. He plans to investigate how the speed of the wagon changes as the mass increases. He will increase the mass by adding 10 pound sand bags, changing the mass to 60 pounds and 70 pounds. In his investigation the independent variable is______?

• The speed of the wagon

• The mass of gravity acting on the wagon

• The mass of the wagon

• The size of the wagon

A student has a 50 pound wagon. He plans to investigate how the speed of the wagon changes as the mass increases. He will increase the mass by adding 10 pound sand bags, changing the mass to 60 pounds and 70 pounds. In his investigation the Experimental Group(s) is/are______?

• The 50 pound wagon

• The 50 and 60 pound wagon

• The 60 and 70 pound wagon

• The 70 pound wagon

A student wants to conduct an experiment to find out how heart rates change as the length of time spent exercising increases. The dependent variable is___________________.

• Breathing Rate

• Heart Rate

• Time spent exercising

• The kind of exercise

A student wants to conduct an experiment to find out how heart rates change as the length of time spent exercising increases. The dependent variable is___________________.

• Age of the person

• Time spent exercising

• The kind of exercise

• Gender of the person

A student hypothesized that the amount of sunlight a sunflower plant receives determines the number of sunflower seeds produced. In her experiment the number of seeds produced is the_____________________.

• DV

• IV

• Cs

• CG

A student is planning an experiment to find out how the height from which he drops a ball affects how high the ball bounces. The independent variable is the_________________.

• diameter of the ball

• mass of the ball

• height that the ball bounces

• height from which the ball is dropped

A student is planning an experiment to find out how the height from which he drops a ball affects how high the ball bounces. Which of the following would be a constant in this experiment?

• the diameter of the ball

• the mass of the ball

• the material of the ball

• all of the above