Variables
What is a variable?
If you are to drop a ball and measure how many times it bounces. What variable is the number of bounces?
Dependant variable
Light bouncing off a mirror?
Transfer
Fire
Heat energy
If a bird swooped Arthur in the eye. What energy is the bird using to swoop him?
Gravity energy and chemical energy > movement energy
What is an Independant variable?
The variable that causes change
Kicking a ball into the sky and measuring how ling it takes to fall to the ground. What is a controlled variable?
Football size and type
Area kicked on
Who kicked the football
other
kicking a ball into a wall
Transfer
Gravity (Movement energy)
If hector was used as a real bowling ball and was thrown into Vaughn, Ishy, Chris, Arthur, Jharal, Jojo, Clifton, Austin, Matilda, and Mia. What energy type would Hector have and what energy type would everyone else receive?
Hector would use kinetic (Movement energy) and then would transfer that movement energy to everyone
What is a dependant variable?
The variable that is changed by the independent variable.
Measuring who grows the most in year 8. What is the controlled variables?
Making sure students are from only year 8
A horse eating grass
Transformation
The sun
Radiation energy
If Edna was running from a stray dog so that she doesn't get attacked. What energy is Edna using (Both what energy she has and what she is turning it into)
Chemical energy (Food) Kinetic (Movement energy)
What is a controlled variable?
The variable that doesn't change
Measuring how much sleep some has when they have an energy drink verses when they have had water. What is the dependant variable?
The amount of time slept
Toaster cooking toast?
Transformation
Someone yelling?
Sound energy
If Ishy jumped in the air and then came back down to the ground. What is the energy called when Ishy has stopped at the very top called?
Potential energy (Gravity)
Why does the dependant variable measurement change in most experiements?
Because it has a change because of the independent variable.
Measuring how fast two cars are that are racing. One car is petrol, and one car is diesel. What is the independant variable?
The fuel type
Wood burning?
A Shanghai
Elastic energy
What energy does a roller coaster use to get up a ramp and what energy does it use to go back down the ramp?
First it uses kinetic energy (Electric or magnet) to go up. The it uses potential gravity energy to go down.