IMBERHORNE KS3 variables

What YOU MEASURE or observe in an experiment.

• constant variable

• control variable

• dependent variable

• independent variable

The one thing YOU CHANGE in an experiment.

• constant variable

• control variable

• dependent variable

• independent variable

All the things that have to stay the same in an experiment (to make it a fair test).

• constant variable

• control variable

• dependent variable

• independent variable

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

• amount of fertilizer

• height of grass

• type of plant

• time

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

• amount of fertilizer

• height of grass

• type of plant

• time

Beth wants to know if increasing her exercise will decrease the time it takes her to run a mile. What is the independent variable?

• distance

• amount of exercise

• time to run a mile

• heart rate

Beth wants to know if increasing her exercise will decrease the time it takes her to run a mile. What is the dependent variable?

• distance

• amount of exercise

• time to run a mile

• heart rate

A researcher did an investigation to see if corn seeds would sprout at different times depending on the temperature of the water in which they were placed.  What is the independent variable?

• How long to sprout
• type of seed used
• water temperature
• how much water used

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

What is the dependent variable?

• Tyre treads

• Braking distance

• Road conditions

• Model of car

The higher the temperature in an oven, the faster a cake will bake.
What is the independent variable?

• Cake flavor
• Temperature
• Time
• Type of oven