Energy Flashcards
What is energy measured in?
J and kJ [joules and kilojoules]
What is power?
The rate of using energy.
What is power measured in?
W and kW [watts and kilowatts]
How can energy that is stored in food be released?
It can be released by combustion [burning] or by respiration in our cells.
What is the typical power rating for a Clock in W?
10 W
What is the typical power rating for an iron in kW?
1.25 kW
What is the typical power rating in W for a kettle?
2400 W
What are energy resources?
Useful supplies or stores of energy.
What is a non-renewable energy resource?
A resource that cannot be replaced when it is used up.
What is a renewable energy source?
An energy source that is replenished and not exhausted.
What is a fossil fuel?
A natural, finite fuel formed from the remains of a living organism.
What is a finite resource?
A resource that can only be used once and is in limited supply.
What is a nuclear fuel?
A radioactive material that is used in nuclear reactors.
