Topic 1: Enegy Flashcards
(25 cards)
What is a system?
An object or a group of objects?
What do systems have?
Energy
What can energy not do?
Be created or destroyed
What can energy only do?
Stored or transferred
How is energy transferred?
When a system changes
What the amount of energy transferred called?
Work done
List all energy stores
Chemical
Elastic potential
Electrostatic
Gravitational potential
Kinetic
Magnetic
Nuclear
List 3 ways energy transfers through a system?
Into or out of a system
Between different object
Between different energy stores
What is power measured by?
Watts
The rate of energy transfer is called what?
Power
1 watt is equal to what?
To an energy transfer of 1 joule per second
What is an energy resource?
A large store of energy
What are the main uses of energy resources?
Transport
Electricity
Generation
Heating
What can energy stores be?
Renewable
Non-renewable
What are the non-renewable energy resources?
Oil, coal, natural gas and nuclear fuel
What are the renewable energy resources?
Biofuel
Wind
Tidal
Water waves
Hydroelectricity
Geothermal
Solar
What is a renewable energy resource?
Energy that is being replenished as it is used
What is biofuel?
Burning wood, plants or animal waste for fuel, or producing biofuels out of special plants
What is wind (renewable energy)?
Using wind at sea or land to drive turbines which generate electricity
What is tidal?
Using the changing sea levels to drive electricity - generating turbines inside dams
What is water waves?
Wind cause waves, which drive electricity-generating turbines
What is hydroelectricity?
Using the energy of falling water to drive turbines inside dams, which generate electricity
What is geothermal?
Heat from deep in the earth’s crust turns water into steam, which drives turbines that generate electricity
What is Solar (renewable energy)?
Absorb sunlight to convert into electricity
