P1 - Energy Flashcards
What are the 8 types of energy store?
Kinetic
Gravitational Potential
Elastic Potential
Electrostatic
Thermal
Chemical
Magnetic
Nuclear
What are the 4 types of energy transfer?
Mechanical ( a force doing work)
Electrical ( work done by moving charges)
Heating
Radiation ( light or sound)
What are the energy transfers of an arm throwing a ball up?
- Chemical energy store of arm
- Force exerted by arm does worn
- Kinetic energy of ball and arm
What are the energy transfers of a ball falling?
- Gravitational potential energy store of ball
- Gravitational force does work
- Kinetic energy store of ball
What are the energy transfers of brakes applied to car wheels?
- Kinetic energy stores of wheels
- Friction does work
- Thermal energy stores of surroundings
What are the energy transfers of a Kettle’s heating element and water?
- Energy transferred electrically
- Thermal energy store of Kettle’s heating element
- Energy transferred by heating
- Thermal energy store of water.
What is the conservation of energy?
Energy can be transferred usefully, stored or dissipated but not created or destroyed.
What is specific heat capacity?
The amount of energy needed to raise the temperature of 1kg of a substance by 1*c
What are two ways to decrease how quickly a building cools?
- Increase thickness of its walls.
- Make walks out of material with lower thermal conductivity - higher a materials thermal conductivity the faster it transfers energy by conduction.
What are the 3 fossil fuels and why are they non - renewable?
- Coal, Oil, Gas
- Because they will run out one day.
What is released when burning fossil fuels?
CO2 - contributing to global warming
Coal and Oil release sulfur dioxide - causing acid rain
What are the 2 disadvantages of Nuclear Power?
Nuclear waste is dangerous and difficult to dispose of.
Carries the risk of a major catastrophe.
Why are wind turbines unreliable renewable energy resources?
Turbines stop turning when wind stops or is too strong
What is geothermal power?
Energy from the thermal energy stores of underground hot rocks used to generate electricity.
What is hydroelectric power?
Big dams, built in valley, full up with water.
Water allowed out through turbines, generating electricity.
What are Bio - fuels?
Made from plant products or animal dung and are burned to generate electricity.
Why did the use of electricity increase from 1900 - 2000?
Population grew and people began to use electricity for more things.
Why did the use of electricity decrease from 2000 onwards?
Appliance are more efficient.
People are more careful with the amount of energy use.
What are the 3 reasons why we’re increasing use of renewables?
- Burning fossil fuels is very damaging to environment.
- We need to learn how to get by without non - renewables before they run out.
- Pressure in governments have led them to introduce renewable energy targets.
