Comp 1b. Formulate questions that can be answered through research and experimental design.

Independent and dependent variable

In order to create a GOOD experimental design question what two things must be present?

Does increasing exercise decrease the time it takes to run a kilometer?

Create an experimental design question from the following scenario. Billy wants to know if increasing his exercise will decrease the time it takes him to run a kilometer.

Studying 10 extra minutes

James wants to know the effect of studying an extra 10 minutes each day on his Biology grade. What is the independent variable

Size of the apples

Joelle wants to determine the effect of pesticides on the size of the apples in the orchard. What is the dependent variable?

Effect of the fertilizer

Justin wants to determine the effect of fertilizer on the growth of grass. What is the independent variable?

Effect on his goldfish

Randell wants to determine if salinity has an effect on his goldfish. What is the dependent variable?

Dependent variable

The MEASURABLE change in an experiment.

Independent variable

What causes the change in an experiment?