Parts of a Controlled Experiement

How many variables can be tested in a controlled experiment?

Things that stay the same throughout an experiment are called

This part of the experiment serves as a basis of comparison

This variable in an experiment is purposely changed by the experimenter

Anything in an experiment that can be changed is called a

This variable is the measured results of the experiment

This group is used to study how the independent variable changes the dependent variable

Experiment: Sendel wants to see if taking the backroads to work is faster than taking the highway during rush hour. What is the independent variable?

Experiment: Sendel wants to see if taking the backroads to work is faster than taking the highway during rush hour. In Sendel's driving experiment, what is the control group?

Experiment: Sendel wants to see if taking the backroads to work is faster than taking the highway during rush hour. In Sendel's driving experiment, what is the experimental group?

Experiment: Sendel wants to see if taking the backroads to work is faster than taking the highway during rush hour. In Sendel's driving experiment, what is the dependent variable?

An experiment is conducted to test how different cleats change an athlete running speed. Six different types of cleats are tested and the 100m run time is recorded. What is the independent variable?

An experiment is conducted to test how different cleats change an athlete running speed. Six different types of cleats are tested and the 100m run time is recorded. What is the dependent variable?

A test is set up to test which brand of soda creates the biggest foam explosion when adding a Mentos candy. Three different sodas were tested. They measured the height of the foam eruption. What is the dependent variable?

Maggie read that some plants grow better if the soil is acidic. She can’t believe that a plant can grow when exposed to acid. Maggie decides to test if the plants she has will grow better when acid is added to the soil. She puts potting soil in two planting containers and transplants two of her geraniums that seem about the same size into the pots. She puts the pots in the same location so that they both get the same sunlight each day, are at the same temperature and she makes sure they get the same amount of water. However, Maggie puts a tablespoon of vinegar in the water she gives to one of the plants and regular water in the other. She measures the growth of the plants every week for five weeks. What are the constants?