Question
How much water flows through a faucet?
Question
Independent Variable
Water faucet opening (closed, 1/2 open, fully open)
Independent Variable
Time measured in minutes.
Independent Variable
Amount of fertilizer measured in grams
Independent Variable
Voltage of electricity supplied to the motor measured in volts.
Dependent Variable(s)
Volume of water flowing measured in liters per minute.
Dependent Variable(s)
Height of candle measured in centimeters.
Dependent Variable(s)
Growth of the plant measured by its height.
Growth of the plant measured by the number of leaves.
Dependent Variable(s)
Speed of rotation measure in RPMs
Controlled Variable(s)
Water pressure (how much the water is "pushing")
Controlled Variable(s)
Use the same type of candle for every test.
Wind--make sure there is none.
Controlled Variable(s)
Same plants
Same soil
Same size pot
Same amont of water and light
Make measurements of growth at the same time.
Controlled Variable(s)
Same motor for every test
Same load of the motor.
Comments
A better measure of the independent variable would be to find the area of the opening in the pipe in square centimeters.
Comments
In this case, time is what causes the dependent variable to change. The scienctist simply starts the process, then observes and records data at regular intervals.
Comments
Comments
How fast does a candle burn?
Question
Does fertilizer make a plant grow bigger?
Question
Does an electric motor turn faster if you increase the voltage?