Hypothesis
If I replace the battery in my car, then my car will get better gas mileage.
What is the Independent Variable?
The battery in the car
The higher the temperature of the air in the oven, the faster a cake will bake.
The temperature
Jake wanted to see the effect of reading at night or day on his eyesight strength.
If I brush my teeth every day, then I will not develop cavities.
What is the dependent variable?
Developing cavities.
The effect of water given to lemon trees on lemon size.
Amount of water received
Micky Mouse wants to see the effect of eating cheese or drinking milk on the smell of his breath.
Breath Smell.
If I add fertilizer to my garden, then my plants will grow faster.
What is the independent variable?
The fertilizer
An investigation found that more bushels of potatoes were produced when the soil was fertilized more.
Amount of fertilizer put.
Rocky wants to see the effect of sleeping in the afternoon on his energy in the evening.
Energy in the evening
If I eat more vegetables, then I will get healthier.
What is the dependent variable?
Becoming Healthier.
Billy Bob Joe wanted to see if water was cooler or warmer at lower lake depths.
Superman wants to see the affect of training by lifting weights on his ability to lift a train.
Ability to lift a train
If Billy Bob Joe sleeps early, he will wake up fresh.
What is the independent Variable?
Sleeping Early.
Colonial Trail Elementary School wanted to see if opening the school early would make more student's come on time.
Time of opening.
Captain America wants to see the effect of newer metal on the strength of his shield.
Strength of his shield.