Free Printable Variables, Scientific Questions, and Hypotheses!

1.

An experiment is set up with ten pots to test the effective of fertilizer on plant growth. 5 pots have fertilizer added to the soil, 5 pots do not have fertilizer added to the soil. Each pot has 1 spider plant and 5 cups of soil. The pots are watered once a week with 1/2 cup of water. Water would be what type of variable?

a)

Indepedent

b)

Dependent

c)

Constant

d)

Water is not a variable

2.

An experiment is set up with ten pots to test the effective of fertilizer on plant growth. 5 pots have fertilizer added to the soil, 5 pots do not have fertilizer added to the soil. Each pot has 1 spider plant and 5 cups of soil. The pots are watered once a week with 1/2 cup of water. Fertilizer would be what type of variable?

a)

Independent

b)

Dependent

c)

Constant

d)

Fertilizer is not a variable

3.

An experiment is set up with ten pots to test the effective of fertilizer on plant growth. 5 pots have fertilizer added to the soil, 5 pots do not have fertilizer added to the soil. Each pot has 1 spider plant and 5 cups of soil. The pots are watered once a week with 1/2 cup of water. What is something that would need to be true of the spider plants?

a)

The plants should not be the same size

b)

The plants should be the same species

c)

The plants cannot grow with fertlizer

d)

The plants are the independent variable

4.

Mrs. Cannaday wants to see which treat causes Voodoo to jump the highest. What is her independent variable?

a)

Voodoo

b)

Type of treat

c)

How high Voodoo jumps

d)

Mrs. Cannaday

5.

Mrs. Cannaday wants to see which treat causes Voodoo to jump the highest. What is her dependent variable?

a)

Voodoo

b)

Type of treat

c)

How high Voodoo jumps

d)

Mrs. Cannaday

6.

Mr. Conyers needs your help: He needs to find the constant variables for his experiment. He is trying to determine what shampoo leaves his beard the softest. Which variable would be a constant?

a)

Type of Shampoo

b)

Softness of Mr. Conyer's beard

c)

Amount of Shampoo

d)

He doesn't need any constant variables

7.

Ms. Forbes is attempting to test which parachute keeps her eggs from breaking when thrown from the roof of her house (this is what she does on the weekends). The type of eggs would be...

a)

the independent variable

b)

the dependent variable

c)

a constant variable

d)

a waste of money

8.

Ms. Forbes is attempting to test which parachute keeps her eggs from breaking when thrown from the roof of her house (this is what she does on the weekends). The type of parachute is....

a)

the independent variable

b)

the dependent variable

c)

a constant variable

d)

a waste of money

9.

Ms. Forbes is attempting to test which parachute keeps her eggs from breaking when thrown from the roof of her house (this is what she does on the weekends). The height of her roof is....

a)

the independent variable

b)

the dependent variable

c)

a constant variable

d)

a waste of money

10.

The librarians want to know which students are checking out what types of books. They are testing "Which type of book do 7th graders check out most often: fiction or nonfiction?" The genre of the book is

a)

the independent variable

b)

the dependent variable

c)

a constant variable

d)

a waste of money

11.

The librarians want to know which students are checking out what types of books. They are testing "Which type of book do 7th graders check out most often: fiction or nonfiction?" The number of checked out books is

a)

the independent variable

b)

the dependent variable

c)

a constant variable

d)

a waste of money

12.

Every hypothesis begins with what word?

a)

Does

b)

If

c)

Which

d)

Then

13.

Does the brand of bubble gum affect the bubble size? Which hypothesis is INCORRECT?

a)

If the subject chews Bubblelicious, Big Red, Juicy Fruit, and Hubba Bubba, then the subject will blow the biggest bubble with Bubblelicious.

b)

If the subject chews Bubblelicious, Big Red, Juicy Fruit, and Hubba Bubba, then the subject will blow the smallest bubble with Big Red.

c)

If I chew Bubblelicious, Big Red, Juicy Fruit, and Hubba Bubba, I will blow the largest bubble with Juicy Fruit.

d)

If the subject chews Bubblelicious, Big Red, Juicy Fruit, and Hubba Bubba, then the subject will blow the smallest bubble with Hubba Bubba.

14.

How does a hypothesis begin?

a)

After writing procedures

b)

After making observations and doing research on a phenomena

c)

After buying materials for an experiment

15.

Scientists base their hypothesis only on their observations

a)

True

b)

False

16.

A hypothesis is based on observations and research

a)

True

b)

False

17.

Scientific questions have to be...

a)

Measurable

b)

Easy

c)

Interesting

18.

Which question is a scientific question?

a)

Why is it foggy?

b)

Is it more likely to be foggy after a drizzling rain or a thunderstorm?

c)

What is fog?

d)

How can I draw a picture of fog with colored pencils?

19.

Which question is NOT a scientific question?

a)

Will a cat sleep longer on a winter day or summer day?

b)

Will the fish have more babies when the temperature of the tank is 70°F or 80°F?

c)

Will the shamrock have more flowers when watered with tap water or distilled water?

d)

If cans of Dr. Pepper and Diet Dr. Pepper are put into a bucket of water, then the Diet Dr. Pepper will float?

20.

What is the proper hypothesis for the scientific question: "Will more students buy cafeteria food on days when the cafeteria serves pizza?"

a)

I think that more students will buy food on the days that the cafeteria sells pizza.

b)

If the cafeteria sells pizza, then the students will win.

c)

If the cafeteria sells pizza, then more students will buy cafeteria food than on days when pizza is not served.

d)

If the cafeteria sells pizza, they will sell more food than on days when they do not sell pizza.

21.

Jill is testing the effect of caffeine on the breathing rate of betta fish. She sets up two fish tanks with identical conditions. She places 10 betta fish in each tank. She adds caffeine to one tank and nothing to the other tank. She then counts the operculum plate movement per minute for the fish in each tank.

What scientific question is the above experiment attempting to answer?

a)

What effect does caffeine have on betta fish?

b)

Will caffeine affect the heart rate of betta fish?

c)

Does caffeine affect the breathing rate of betta fish?

d)

Is the amount of caffeine affected by the betta fish?

22.

John believes the water plant Elodea will produce more oxygen when placed closer to a light source. He places four Elodea plants of the same height at varying distances from a lamp: 1 meter, 2 meters, 3 meters, and 4 meters. The plants are in identical aquariums with a beaker placed over each plant. The oxygen content inside the beaker is measured after each plant sits for 8 hours.

Which question best describes John's experiment?

a)

Does the amount of oxygen affect the amount of light needed by the plant?

b)

Does a plant produce more oxygen when it is placed closer to a light source?

c)

How does the type of plant affect the oxygen produced when placed by a lamp?

d)

Will the light affect how much the Elodea plant grows when placed in the light?

23.

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)

The type of plant

b)

The amount of sunlight

c)

The type of music

d)

The type of liquid

24.

Ryan wants to test which cleats enable him to run the fastest. Which question is the proper scientific question?

a)

"Which cleats will help me run faster?"

b)

"Which brand of cleats will enable Ryan to run the fastest time in 100 meters?"

c)

"Do different brands of cleats affect running speed?"

d)

"Which brand of cleats helps Ryan run better?"

Variables, Scientific Questions, and Hypotheses!

Total questions: 24

Worksheet time: 21mins

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