Understanding Variables in Experiments

What is a variable in the context of an experiment?

• A factor that is always controlled

• A constant factor

• A factor that changes

• A factor that is always measured

Which of the following is an independent variable?

• The weather conditions

• The time taken to complete a task

• The type of dogs used

• The amount of coffee given

What is the dependent variable in an experiment?

• The factor that is changed

• The factor that is measured

• The factor that is controlled

• The factor that is ignored

In the dog experiment, what was the hypothesis?

• Coffee has no effect on dogs

• Dogs are slower with coffee

• Coffee makes dogs faster

• Dogs are faster without coffee

What was the control in the dog experiment?

• The time of day the experiment was conducted

• The type of coffee used

• The track where the dogs ran

• The amount of coffee given

What conclusion was drawn from the dog experiment?

• Coffee improves dog agility

• Coffee makes dogs faster

• Coffee has no effect on dogs

• Coffee makes dogs slower

How can you remember the difference between independent and dependent variables?

• Independent variables are changed, dependent variables are measured

• Independent variables are ignored, dependent variables are controlled

• Independent variables are controlled, dependent variables are ignored

• Independent variables are measured, dependent variables are changed

What is the role of controls in an experiment?

• To change the outcome

• To measure the results

• To keep certain factors constant

• To ignore certain variables

Why is it important to have a control in an experiment?

• To ensure the experiment is biased

• To make the experiment more complex

• To change the dependent variable

• To eliminate other possible explanations for the results

What was the dependent variable in the dog experiment?

• The time taken to run the 100-yard dash

• The amount of coffee given

• The type of dogs used

• The weather conditions