Renewable energy
Which of these is a renewable energy resource?
a. solar
b. petrol
c. coal
d. diesel
Solar
Name the 3 fossil fuels
Coal, oil, gas
Power rating
What type of energy is stored in fuels?
Chemical
Heat is transferred through solids by:
a. conduction
b. convection
c. radiation
a. conduction
Name 3 different renewable energy resources
Wind, tidal, hydroelectric, geothermal, solar
Give one disadvantage of fossil fuels
They will run out one day
When coal is burned, it turns chemical energy into thermal energy and light energy.
Which type of energy is useful?
Thermal
Name two types of energy stores that are released when coal is burned.
Heat and light
Convection is caused by:
a. less dense areas rising
b. more dense areas sinking
c. less dense areas sinking
a. less dense areas rising
Give an advantage of renewable energy resources
They won't run out
How long does it take to make fossil fuels?
millions of years!
A wind turbine turns k_____ energy into e______ energy
kinetic, electrical
Which energy source do plants use to make sugar?
Chemical
What colour is the best at absorbing radiation?
Black/dark colours
Give a disadvantage of renewable energy resources
They rely on things like the weather. E.g. the sun for solar
What is a finite resource?
A resource that will run out
The amount of energy used by a device is measured in:
a. volts
b. kilowatt hours
c. seconds
b. kilowatt hours
What must particles do to transfer energy in a metal pan?
Particles must vibrate
How is heat transferred in a metal?
Particles vibrate when heated.
There are free electrons that carry the heat energy through the metal
Give a disadvantage of using the wind to generate electricity
On a day with no wind, there would be no electricity generated.
How are fossil fuels made?
Fossils are put under high pressure and compressed for millions of years.
What are the useful energy changes that happen when a turbine generates electricity?
A turbine moves (kinetic energy) which generates electrical energy.
A toaster has a power rating of 2000W.
What is the power rating in kilo watts?
2kW
What is an insulator?
An insulator is a material that does not conduct heat or electricity