Variables

Question 0

A burger joint in town has made a new sauce that they believe decreases body odour. They split 100 people into 2 groups, 50 in ‘A’ and 50 in ‘B’. They give burgers with the new sauce to group A and a fake sauce that looks the same to group B. What is the Independent variable, (IV) the dependant variable (DV) and the control variable/group (CG)

Answer 0

IV= New Sauce
DV=Amount of BO
CG= Group B

Question 1

Arnie is giving body building another shot. He is told a new muscle cream can double muscle power when used with a workout. He buys the cream and hires Anne Hathaway and Kevin Bacon to help him with an experiment. He puts Anne and Kevin on a special weight lifting program and meets them once every day for 2 weeks and keeps track of the results. Before each session, Kevin’s arms are covered in the cream, whilst Anne’s arms are cover in sun screen
What is the CV, the IV and the DV?

Answer 1

CV= Anne Hatthaway
IV= The Muscle Cream
DV= Weights Lifted

Question 2

What is a ‘Controlled Variable?’

Answer 2

A control(ed) variable is something that remains constant or unchanged in an experiment. It is held constant to help measure the impact of the independent variable(s)

Question 3

What is an ‘Independent variable?’

Answer 3

An independent variable is the variable that is manipulated or changed by the scientist to test the effect on the dependant variable. The affect is than measured and recorded.

Question 4

What is a dependant Variable?

Answer 4

A dependant variable is the variable being tested in a scientific experiment, it is called this because it is ‘Dependent’ on the independent variable as the experimenter changes the independent variable, the change in the dependant variable is changed and recorded.

Question 5

Why is the dependant variable called the ‘dependant variable’?

Answer 5

Because it is ‘Dependant’ on the independent variable.