Very Variable

Variable

100

The thing in the experiment that the scientist changes on purpose.

What is the independent variable?

200

This is what the scientist must observe or measure.

What is the Dependent Variable?

300

The second grade students want to know which milkweed their caterpillars like best. They plant common milkweed and tropical milkweed in their garden. What part of this experiment would we label the Independent Variable?

What is the milkweed?

400

Mr. Edmonds wants to know if adding more air to a basketball will make it bounce higher. In this experiment what would the dependent variable be?

What is the height the ball bounces?

500

We want to know what type of soil is best for growing strawberries. We have sandy soil, topsoil and, silt. In this experiment name the: Independent Variable, the Levels of the Independent Variable and the Dependent Variable.

What is the different types of soil (IV), sandy soil, topsoil, and silt (Levels of the IV), and the height of the plants or the number of strawberries produced (DV)?

That's not fair!

100

When you do an experiment it is important to change only one thing at a time. You must be careful to keep many parts of the experiment the same. Everything that you do NOT change is called a ____________.

What is a constant?

200

We want to know if placing a fish tank near a window will result in more algae growth inside the tank. If we wanted to make sure our fish tank test is fair name at least 3 things that should be kept constant.

What is the size of the fish tank, the type of fish tank, the shape of the tank, the number of fish in the tank, the type of fish in the tank, the amount and type of water in the tank?