Control Group vs Experimental Groups

Control Group vs Experimental Groups

Fill in the Blanks

The experimental group is exposed or given the

variable.

Multiple Choice

Which group is the control group?

• The plant given Bio fertilizer X

• The plant not given Bio fertilizer X

Multiple Choice

Some teachers think that students learn best in rooms with music. They teach the same

lesson, but one class plays music in the background and the other is not. They give a test and compare the results. which is the experimental group?

• group with music playing

• group with high test scores

• group with no music playing

Multiple Choice

Anna is doing an experiment about friction. She measures the force needed to pull a toy car up a ramp three times. Then she attaches plastic wrap to the ramp and

measures the force needed to pull the car up three times. Next, she puts water on the ramp and measures the force three times. Finally, she puts oil on the ramp and measures the force three times.

What is the independent variable in Anna’s experiment?

• ramp with water

• spring scale

• material put on the ramp

• toy car

Multiple Choice

Chissy is doing an experiment to see the way rocks are affected by tumbling in water. She started by breaking up a soft rock.

Cherise puts most of the pieces of rock in a jar with some water. She shakes the jar and removes pieces of rock after 100, 200, 300, 400, and 500 shakes. The other rocks sit in the jar without shaking.

Does she have an experimental group

• no

• yes

Multiple Choice

Zack is testing whether temperature affects the distance a rubber band can be stretched before it breaks. He heats three rubber bands in a microwave oven. He puts

three in a jar on the kitchen counter. He puts three in the refrigerator and three in the freezer.

Which is the control group?

• rubber bands in the jar

• rubber bands in the freezer

• rubber bands in the refrigerator

• rubber bands in the microwave

Multiple Choice

A gardener is doing an experiment. He is trying to find the solution of nutrients and water that is best for growing carrots.

He plants four groups of carrots. Which group is considered the control group?

• Group A

• Group B

• Group C

• Group D

Multiple Choice

Martin is doing an experiment to see the way plants grow without soil. He is growing the plants in different solutions of water and nutrients. In this experiment, what is a plant

that gets no nutrients called?

• condition

• control

• mixture

• variable

Multiple Choice

A drug company is testing a new medicine. They give one group of test subjects the new medicine in a tablet. They give the other group an identical tablet with no medicine.

What is the Experimental Group?

• to find out how long it takes people to get well with no medicine

• group an identical tablet with no medicine

• group of test subjects the new medicine in a tablet.

Multiple Choice

Eiko is doing an experiment to determine the best fertilization plan for bean plants.

She will test four groups of four plants using this schedule.

Which group is the control group?

• Group A

• Group B

• Group C

• Group D

Multiple Choice

In the experiment shown, plant A received 50 mL of coke each day, plant B received 50 mL of juice, and plant C received 50 mL of water.  Every day for one week, plant growth was measured.  Which group served as the control group?

• Plant A
• Plant B
• Plant C
• There was no control group

Multiple Choice

A company wants to sell more sports drinks so they decide to add more sugar.  For Group A they give them gatorade with an added teaspoon of sugar. For Group B they give them plain gatorade without adding sugar. Which Group is the CONTROL GROUP?

• Group A
• Group B
• The Gatorade
• The Company

Multiple Choice

The group which does not get the independent variable; "normal" conditions

• Control Group

• Experimental Group

Multiple Choice

This type of VARIABLE is kept the SAME for both experimental and Control Groups

• Independent
• Dependent
• Control (Constant)
• Inference

Multiple Choice

This part of the experiment serves as a basis of comparison; the one variable being tested has been omitted (left out).

• experimental group

• control group