Match them to their definitions
Dependent variables
variable
control variable
Independent variables
the variable that is being changed during the experiment
is anything that can change and be measured
variable which must be kept the same so that the result of the experiment is not affected
the variable being tested or measured during the experiment
Adding different amounts of water to a plant could affect its growth. To investigate this, plant some seeds and water each plant with different amount over time. Use the information to match them to their variable
control variable
independent variable
dependent variable
volume of water given to each plant
how high the plant grows
size of pots, the type of soil and the position in a room
Dropping a ball from different heights could affect how high it bounces. use the information to match them to their variables
independent variable
Control variables
dependent variable
type of ball, the surface that it is dropped onto and the size of the ball
how high the ball bounces
the height of the drop
Reaction times can be investigated by dropping a ruler and seeing how quickly someone can grab it. Use the information to match them to their variables
dependent variable
Control variables
independent variable
how far the ruler dropped
the position of the ruler above the hand and the distance between the finger and thumb
the person who is trying to catch the ruler
How the angle of a ramp affects the speed of a car can be investigated by timing how long the car takes to travel a certain distance. Use the information to match them too their variables
dependent variable
independent variable
Control variables
the distance that the car travels, the surface it travels over and the car
the speed the car travels
the angle of the ramp
