A florist wants to see if Product X will extend the life of cut flowers so that they last longer. What is the dependent variable?

You think that a certain part of your brain is important in memory. To test this, you will remove this part of the brain from rats and see if they remember how to get through the maze. What is the independent variable in this experiment?

You want to test a new drug that supposedly prevents sneezing in people allergic to grass. What is the independent variable?

You want to see if playing music makes plants grow taller. What is the independent variable in this experiement?

A soap manufacturer wants to prove that their detergent works better to remove tough stains. What is the dependent variable?

An entomologist (bug scientist) wants to determine if temperature changes how many times a cricket chirps. What is the dependent variable?

You want to measure the effect of different amounts of oxygen on the rate of yeast growth. What is the independent variable?

Orchids were studied to determine if the amount of humidity affected the flowering of these plants. Which of these was the independent variable in this study?

Ms. Fiore wanted to see how different types of music affected students' pulse rates. She played different types of music: heavy metal, rap, R&B, alternative, pop, country, and classical music. Identify the dependent variable.

The higher the temperature of the air in the oven, the faster a cake will bake. Which would NOT be a constant?

Jakub studied how far room temperature water would spurt out of a platic milk carton when 3mm holes were punched at different heights from the bottom of the container. Identify a constant.

Students of different ages were given the same puzzle to assemble. The puzzle assembly time was measured. What would be a constant?

An experiment was performed to determine how the amount of coffee grounds could affect the taste of coffee. The same kind of coffee, the same coffee maker, and the same amount of water were used. Which would NOT be a constant?

Two groups of students were tested to compare their speed working math problems. Each group was given the same problems. One group used calculators and the other group computed without calculators. What is your control?

A summary of the experiment that includes whether hypothesis was supported or not.

What is the affect of salt water on the the height of blades of grass?

What is the independent variable in the above question?

What are the number of times each level of the independent variable is tested?

Students wanted to see if the type of material affected the temperature after being placed under a heat lamp for 10 minutes.

What is the dependent variable for this investigation?

The variable on the x- axis of a graph

Erin is testing to see how different amounts of nitrogen infused in the soil will impact the height of her corn plants. She puts two corn plants into two pots. One is filled with nitrogen infused soil and the other is not. She puts the regular soil pot outside and the nitrogen infused plant in her bathroom. The corn in the regular soil grows to 7 feet tall and the corn in the nitrogen soil grows to 2 feet tall.

What is her independent variable?

Erin is testing to see how different amounts of nitrogen infused in the soil will impact the height of her corn plants. She puts two corn plants into two pots. One is filled with nitrogen infused soil and the other is not. She puts the regular soil pot outside and the nitrogen infused plant in her bathroom. The corn in the regular soil grows to 7 feet tall and the corn in the nitrogen soil grows to 2 feet tall.

Which part of the experiment did she mess up on?

This variable goes on the y-axis on a graph