Free Printable Scientific Variables

1.

This part of the experiment serves as a basis of comparison:

a)

control group

b)

Independent variable

c)

dependent variable

d)

data

2.

This variable in an experiment is the one being deliberately changed by the scientist.

a)

dependent variable

b)

independent variable

c)

data

d)

control group

3.

An experiment is performed on plants to see how different liquids affect plant growth. Each plant in the experiment is given a different liquid; water, apple juice, or milk. Each plant has the same amount of soil, sunlight, and listens to the same music. In this investigation, the independent variable is ...

a)

type of plant

b)

the amount of sunlight

c)

the type of music

d)

the type of liquid

4.

The summary at the end of an experiment that explains the results.

a)

conclusion

b)

hypothesis

c)

procedure

d)

question

5.

A student wants to test the effects of type of exercise on heart rate. What is the dependent variable?

a)

time of day exercise occurs

b)

amount of exercise

c)

heart rate

d)

type of exercise

6.

An experiment is performed on plants to see how different liquids affect plant growth. Each plant in the experiment is given a different liquid; water, apple juice, or milk. Each plant has the same amount of soil, sunlight, and listens to the same music. In this investigation, what are the controlled variables?

a)

type of plant, amount of music, and sunlight

b)

plant growth

c)

water, apple juice, milk

7.

An experiment was carried out to determine whether drinking caffeinated soda increases pulse rate. The pulse rates of two groups of people at rest were measured. Group A was then given caffeinated soda and group B was given caffeine-free soda. One hour after drinking the soda, the pulse rates were measured. The participants in the experiment were all the same age, and they were all given the same amount of soda. The dependent variable in this experiment is the

a)

type of soda given to each group

b)

amount of soda given to each group

c)

pulse rate of each group

d)

age of participants in each group

8.

A testable question should include what two things?

a)

A hypothesis and question

b)

A question and a dependent variable

c)

An independent variable but no dependent variable

d)

An independent variable and a dependent variable

9.

Christopher set up six tanks with equal volumes of 20 ℃ water. Three of the tanks contained water with a high salt content of 30 parts per thousand and three contained water with no salt. Christopher added an equal amount of green algae to each tank. He allowed the algae to grow in the tanks for two weeks. Then, he measured the amount of algae in each tank. Identify the question that Christopher’s experiment can best answer.

a)

Is the growth of algae affected by the temperature?

b)

Do algae grown in water with a high salt content release more oxygen than an equal amount of algae grown in water without salt?

c)

Do algae grow more in water with high salt content than in water without salt?

10.

When experimenting with the growth of a plant, a scientist uses three (of the same type of) plants, two different fertilizers, equal light, and equal water. The fact that we kept the light, plant, and water the same in each experiment are examples of ____________.

a)

an dependent variable

b)

an independent variable

c)

a control

d)

constants

11.

The variable that is being measured or observed is called the _______________. Hint: this is the variable that is the result or effect

a)

independent variable

b)

dependent variable

c)

control variable

12.

What is a constant/control in an experiment?

a)

Things that do not change in a experiment. It's the variable that stays the same. You can have many variables stay the same.

b)

It's the variables that the scientist changes in the experiment

c)

It's the variables that are being measured in an experiment

13.

If I ride my bike to school instead of walking, then I will get to school faster. What is the dependent variable?

a)

True

b)

How fast you get to school

c)

Riding a bike or walking

d)

False

14.

If you conduct an experiment where you place 5 of the same red candies in different types of soda, all in the same amount of liquid and same type cups the indipendent variable is what?

a)

Kind of soda

b)

Type of cup

c)

Amount of soda

d)

Color of candy

15.

A scientist investigates the effect of carbon dioxide on plant height. The scientist grows plants in several closed containers. All the plants receive the same amounts of water and light, but the air in each container has a different amount of carbon dioxide. What is the independent variable in this experiment?

a)

the amount of carbon dioxide in each container

b)

the number of plants in each container

c)

the amount of water provided to the plants

d)

the height of each plant after a period of time

16.

Researchers are developing a new fertilizer designed to improve the growth of endangered Hawaiian plants. The fertilizer was applied to one hundred plants in a greenhouse. The temperature, humidity and amount of water were kept constant. Which is best for the researchers to do next?

a)

A compare plants that received fertilizer plants that received none

b)

B begin selling the fertilizer to gardeners living in hot, dry climates

c)

C change the conditions in the greenhouse and retest the fertilizer

d)

D test the fertilizer on plants that are adapted to cooler climates

17.

A scientist investigates the effect of carbon dioxide on plant height. The scientist grows plants in several closed containers. All the plants receive the same amounts of water and light, but the air in each container has a different amount of carbon dioxide. What is the independent variable in this experiment?

a)

the amount of carbon dioxide in each container

b)

the number of plants in each container

c)

the amount of water provided to the plants

d)

the height of each plant after a period of time

18.

An experiment is performed on plants to see how different liquids affect plant growth. Each plant in the experiment is given a different liquid; water, apple juice, or milk. Each plant has the same amount of soil, sunlight, and listens to the same music. In this investigation, what is the dependent variable?

a)

Type of plant

b)

Water, apple juice, milk

c)

Plant growth

19.

Mr. S set up an experiment to see how the mass of a ball affects the distance it rolls off a ramp. What is the dependent variable?

a)

Distance traveled by the ball

b)

Height of the ramp

c)

Mass of the ball

20.

Mr. S set up an experiment to see how the mass of a ball affects the distance it rolls off a ramp. Identify the independent variable.

a)

Distance traveled by the ball

b)

Height of the ramp

c)

Mass of the ball

21.

What is an observation?

a)

A scientific statement based on ideas

b)

Using your senses to notice what is going on around you

c)

To be unaware of your surroundings

d)

The question that you want an answer to.

22.

Mr. S normally uses praise as a reward to train his dog. He wants to know the best way to train his dog, so he sets up an experiment to find out if there is a better way to get his dog to respond to commands. What is his dependent variable?

a)

Type of reward

b)

Praise

c)

Type of dog

d)

Amount of time the dog follows commands

23.

The “Normal” group in an experiment. You can COMPARE your results to this one (nothing happened to it).

Example: If you are testing the effect of the amount of water on plant growth, this group of plants receives the recommended amount of water.

a)

Constant

b)

Variable

c)

Control Group

d)

Experimental Group

24.

The things that are changing in an experiment

a)

Variables

b)

Questions

c)

Hypothesis

d)

Data

25.

The one thing that a scientist changes in their investigation

a)

Variable

b)

Independent variable

c)

data

d)

Hypothesis

26.

What the scientist is measuring in their investigation.

a)

Dependent variable

b)

variable

c)

hypothesis

d)

data

27.

What is a constant/control in an experiment?

a)

Things that do not change in a experiment. It's the variable that stays the same. You can have many variables stay the same.

b)

It's the variables that the scientist changes in the experiment

c)

It's the variables that are being measured in an experiment

28.

In an experiment to find out how the temperature affects the bounce height of a ball, the dependent variable is ...

a)

temperature

b)

bounce height

c)

the thermometer

d)

the ruler

29.

Research Question: Does the type of gasoline put in a car affect how fast the car can drive.

What is the independent variable?

a)

Type of gasoline

b)

which car the gas is put into

c)

how fast the car can drive

d)

how much gas is put into the car

30.

How many independent variables should you have in an experiment?

a)

two

b)

as many as possible

c)

four

d)

one

31.

This part of the experiment serves as a basis of comparison; the group that does not receive the independent variable.

a)

constant

b)

control group

c)

experimental group

d)

hypothesis

32.

This is the group that is affected by the variable or the group that is changed.

a)

Control Group

b)

Experimental Group

c)

Changed Group

d)

Cool Group

33.

If I floss more, then I will have fewer cavities. What is the independent variable?

a)

Number of cavities

b)

Amount of flossing

c)

Type of floss used

d)

Amount of brushing

34.

What is a constant?

a)

the normal situation

b)

the thing we measure in the end

c)

the thing we are testing

d)

the thing we keep the same for every part of the experiment

35.

What is a constant/control in an experiment?

a)

Things that do not change in a experiment. It's the variable that stays the same. You can have many variables stay the same.

b)

It's the variables that the scientist changes in the experiment

c)

It's the variables that are being measured in an experiment

Scientific Variables

Total questions: 35

Worksheet time: 36mins

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