Types of Energy
Kinetic
Can energy be destroyed?
No
What energy transformation occurs in a speaker?
Electrical to sound
If an appliance is efficient, do you save money or lose money?
Save money
What is an aim?
What you are going to do in an experiment.
The energy you produce when you speak.
Sound
Can energy be created from nothing?
No
What energy transformation occurs in a light bulb?
Electrical to heat and light.
If an appliance is inefficient, do you save money or lose money?
Lose money
What is a hypothesis?
A prediction about the outcome. It's what you're testing.
The energy that allows us to see things.
Light
What happens to energy when it appears to be destroyed?
Transforms into another kind
What energy transformation occurs when you drop something?
Gravitational potential to kinetic.
What is energy efficiency?
How much energy something needs to do its job.
What is a conclusion?
A summary of the results that links to the hypothesis and aim.
The energy stored by a slingshot.
Elastic potential
What type of energy is usually produced by when energy is lost?
Heat
What energy transformation occurs when a battery powers something?
Chemical potential to electrical.
If an appliance is inefficient, where does the lost energy go?
Transformed to other forms, usually heat
What is the independent variable?
The energy acquired by an object's position in a gravitational field.
Gravitational potential
State the law of conservation of energy.
Energy cannot be created or destroyed, only changed from one form to another.
What energy transformation occurs when a stick of dynamite explodes?
Chemical potential to heat, light and sound
efficiency = useful output / total input
How do you make an experiment a fair test?
Control variables so that there is only one independent variable.