Variable Types Practice

A study was done to find if different tire treads affect the braking distance of a car.

• Independent Variable

• Weight of car

• Control Variable

• Braking distance

• Dependent variable

• Tire tread type

The time it takes to run a mile depends on a person's running speed.

• Dependent Variable

• Type of track

• Independent Variable

• Time

• Control Variable

• Running Speed

The height of bean plants depends on the amount of water they receive

• Independent Variable

• Temperature

• Control Variable

• Height of bean plant

• Dependent Variable

• Amount of water

The higher the temperature of the air in an oven, the faster a cake bakes.

• Dependent Variable

• Time it takes to bake a cake

• Independent Variable

• Temperature of oven

• Control Variable

• Type of oven

Lemon trees receiving the most water produced the most lemons

• Independent Variable

• Amount of lemons produced

• Dependent Variable

• Soil type the tree is planted in

• Control Variable

• Water given to tree

An investigation found that more bushels of potatoes were produced when the soil was fertilized more

• Control Variable

• Amount of bushels of potatoes

• Independent Variable

• Amount of Fertilizer

• Dependent Variable

• Type of Fertilizer

Students measured the temperature of the water at different depths in Lake Skywalker and found that the temperature varied

• Dependent Variable

• Depth

• Control Variable

• Temperature

• Independent Variable

• Time of Day

The amount of pollution produced by cars was measured for cars using gasoline containing different amounts of lead.

• Independent variable

• Amount of Lead

• Dependent Variable

• Pollution Produced

• Control Variable

• Type of Car

Four groups of rats are weighed and then fed identical diets, except for the amount of vitamin A they receive. Each group gets a different amount. After 3 weeks on the diet, the rats' weights are measured again to see if there has been a decrease.

• Control Variable

• Weight of Rat

• Independent Variable

• Type of Rat

• Dependent Variable

• Amount of Vitamin A