Chapter 2 - Energy Flashcards
State the unit of energy
Joules or kilojoules if there are 1000 joules
What is the law of conservation of energy
Energy can nor be created or destroyed . Only transferred
State three way energy is transferred
Electric currents , light and sound are three way of transferring energy
State the unit of tempurature
Degrees celcius
How do u measure temperature
With a thermometer
What happens if you heat up a liquid
It becomes a gas . The particles vibrate faster
What is a conductor
A conductor is an object where energy is transferred very quickly through it . Eg (metal)
What is an insulator
They are objects that keep air warm . Eg (a duvet)
Name two sources of infrared radiation
The sun
What happens when infrared hits a shiny surface
When infrared hit this surface it reflects infrared heat
Name three fossil fuels
Coal , oil and gas
What greenhouse gas is produced when fossil fuels burn
Carbon dioxide
What are three renewable energy resources
Solar energy : generated from light , biomass energy : generated from plants ,wind : turns a turbine which creates energy
State the unit of power
Watts
What unit do electricity companies use
Kilo watts per hour
