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?

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 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 _____.

A student is planning an experiment to find out how the height from which he drops a ball affects how high the ball bounces. What is the control variable?

Lauren is convinced that book/movie combinations are better if you have read the book before watching the movie. Lauren's friend, Alyssa, thinks that movies are just as good even if you don't read the book. They got 40 of their classmates to help them solve their debate. 20 classmates read the book Divergent and 20 more classmates viewed the movie without reading the book. All participants went to see the movie on Friday at 6 p.m. They had their classmates do a survey (1-4 stars). Then, Alyssa and Lauren averaged the number of stars for both groups.
What is the independent variable?

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.

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?

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 controlled variable?

Jessie is concerned about how tired his classmates seem. He created a drink that he thinks will boost their energy. He recruits 100 classmates with a history of tiredness. He has 50 of them drink his new special energy drink. The other 50 drink a beverage that looks like the special energy drink, but is just water and food coloring. Both groups were told that they were getting the special drink that would boost energy. After 2 hours, 30 classmates in the first group reported having more energy and 8 classmates in the second group reported having more energy.
What is the independent variable?

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?

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 independent variable?

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?

Find the DV:  You experiment to see if a bouncy ball or a tennis ball bounces higher.

Find the DV:  You experiment to see if the Fortune Teller fish reacts to different amounts of heat.

Find the DV:  You experiment to find out if you can blow bigger bubbles when it is hot outside or when it is cold outside.

Find the IV:  You experiment to discover if your pulse rate is affected by caffeine

Find the IV:  You experiment to see if a bouncy ball or a tennis ball bounces higher.

The variable that is being tested or changed

The variable that is being measured

the variable that is kept the same to make sure results are caused by the thing being tested

Scientific Question:  Does being tardy impact test scores?
What is the independent variable?

Scientific Question:  Does playing video games improve reaction time?
What is the controlled variable?

Scientific Question:  Does the type of sneaker you wear affect how fast you can run?
What is the independent variable?

What effect does an increase in temperature have on the decaying process of apples?

How does increasing the slope of a ramp affect how far a marble travels?

Does decreasing the cost of shipping attract more buyers to a website?

WHICH ANSWER IS A CONTROL FOR THE QUESTION:
Does warm water or cold water dissolve salt faster?

WHICH ANSWER IS A CONTROL FOR THE QUESTION:
Which brand of laundry detergent works better to remove grass stains?

A controlled experiment is one where

The question in a controlled experiment includes:

A conclusion must have which of the following:

The step by step directions of the experiment are found in the:

Anything in an experiment that can  be changed.

An Independent variable is the one that is changed in an experiment.  

Controlled variables are quantities that a scientist wants to change constantly.

You can have more than one independent variable in a controlled experiment.

Should you be recording your information during your experiment?

When do we draw conclusions during a science investigation?