Variables

An experiment is set up with ten pots to test the effectiveness of fertilizer on plant growth. Five pots have fertilizer added to the soil, five pots do not have fertilizer added to the soil. Each pot has one plant and the same amount of soil. The pots were given the same amount of water. What type of variable would water be?

• Independent

• Dependent

• Constant

• Water is not a variable

An experiment is set up with ten pots to test the effectiveness 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 plant and the same amount of soil. The pots are watered once a week with 1/2 cup of water. Fertilizer would be what type of variable?

• independent variable

• Dependent
• Constant
• Fertilizer is not a variable

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 ...

• The type of plant
• The amount of sunlight
• The type of music
• The type of liquid

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?

• Type of plant
• Water, apple juice, milk
• Plant growth

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 dependent variable is the _____.

• Diameter of the ball
• Force acting on the ball
• Height that the ball bounces
• Height from which the ball is dropped

Claim: Drinking protein shakes will increase the amount of weight a person can lift.

What are two possible constants for the experiment above.

• The amount of weight lifted after a month of protein.

• The amount of time lifting each day

• The amount of protein consumed

• If the person eats protein or not

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

• Distance traveled by the ball

• Height of the ramp

• Mass of the ball

• The material the ball is made from

Claim: Drinking a Monster Energy drink will increase your focus during class.

What is the dependent variable in the claim above?

• Time focused during class

• Special energy drink
• The food coloring
• The type of class

Maria wants to know if birds prefer to eat in one place over another. She makes three feeders out of 2-liter bottles and paints all of them red. She fills each of the feeders with the same amount of mixed birdseed, and plans to keep the feeders out for 10 days before measuring how much seed is eaten from each feeder. She puts each of the feeders in her back yard: one feeder in a large dead tree, another feeder she sits on the dog house, and the last she sits in a small bushy tree.
What is the independent variable?

• Color of the birdfeeders

• Placement of birdfeeders
• Amount of seed
• Type of seed

Maria wants to know if birds prefer to eat in one place over another. She makes three feeders out of 2-liter bottles and paints all of them red. She fills each of the feeders with the same amount of mixed birdseed, and plans to keep the feeders out for 10 days before measuring how much seed is eaten from each feeder. She puts each of the feeders in her back yard: one feeder in a large dead tree, another feeder she sits on the dog house, and the last she sits in a small bushy tree.
What is the dependent variable?

• Length of the birdfeeders
• Amount of time feeders are outside
• Amount of seed eaten
• Color of birdfeeders