Science Investigation - Fair Testing

I learned that well you are doing a fair test you can only change one thing.

The first one room 4 did was  Growing in the dark: Plants and light.

Aim - what are you trying to find out?	If plants can grow without sunlight.
Hypothesis - what do you think your results will be?	I think the plant won’t grow in non sunlight.
Independent Variable - what variable will you change?	The seed of the plant.
Dependent Variable - what variable will you measure?	The water.
Controlled Variable - what variables will you keep the same?	The pot, bean seed and oil.

The second one was: What colour of bird feeders birds preferred.

Aim - what are you trying to find out?	What colour of bird feeders birds preferred.
Hypothesis - what do you think your results will be?	I think it would be a good fair test.
Independent Variable - what variable will you change?	The Colour
Dependent Variable - what variable will you measure?	The water
Controlled Variable - what variables will you keep the same?	The seeds