Experiment Design

Research question: Does a person's height affect how well they will do on their math test? What is the dependent variable?

• How tall the person is

• Who the person is

  
  

• How well they do on the math test

• Type of shoes someone is wearing

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. What type of variable is the fertilizer?

• Dependent

• Independent

• Controlled

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. One group will be given no fertilizer. This is:

• the control group

• the independent group

• the experimental group

• the dependent group

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 groups give different concentrations of fertilizer are:

• the control groups

• the independent groups

• the experimental groups

• the dependent groups

Which variable depends on what is done at the beginning of an experiment?

• Dependent

• Independent

• Controlled

• Constants

What would the INDEPENDENT variable be in an experiment testing which shape of paper airplane goes furthest?

• the paper used

• the shape of an airplane

• the distance of each plane's flight

• how hard the plane is thrown

Research Question: Does the type of gasoline put in a car affect how fast the car can drive? What is the independent variable?

• type of gasoline

• which car the gas is put into

• how fast the car can drive

• how much gas is put into the car

Research Question: Does the type of gasoline put in a car affect how fast the car can drive? What is the dependent variable?

• type of gasoline

• which car the gas is put into

• how fast the car can drive

• how much gas is put into the car

Research Question: Does the type of gasoline put in a car affect how fast the car can drive? What would be a good controlled variable / constant?

• the age of the driver

• the speed of the car

• the color of the cars

• how much gas is put into the cars

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