P1a key words flashcards
Upcoming SlideShare
Loading in...5
×
 

P1a key words flashcards

on

  • 234 views

AQA P1a key words

AQA P1a key words

Statistics

Views

Total Views
234
Views on SlideShare
234
Embed Views
0

Actions

Likes
0
Downloads
1
Comments
0

0 Embeds 0

No embeds

Accessibility

Upload Details

Uploaded via as Microsoft PowerPoint

Usage Rights

© All Rights Reserved

Report content

Flagged as inappropriate Flag as inappropriate
Flag as inappropriate

Select your reason for flagging this presentation as inappropriate.

Cancel
  • Full Name Full Name Comment goes here.
    Are you sure you want to
    Your message goes here
    Processing…
Post Comment
Edit your comment

P1a key words flashcards P1a key words flashcards Presentation Transcript

  • Physics P1aKey Words
  • Fossil fuels
  • Fuels that are formed in the Earth overmillions of years from the remains of deadanimals and plants, for example coal, oil and natural gas
  • Conduction
  • The transfer ofthermal energy (heat)from the hotter partsof a substance to the colder parts of thesubstance without the substance itself moving.
  • Convection
  • •The transfer of thermal energy (heat) by the movement of a liquid or gas
  • Radiation
  • The transfer ofthermal energy by infra-red waves
  • Chemical energy
  • The energy stored in fuel (includingfood). This energy is released whenchemical reactions take place.
  • Kinetic energy
  • The energy of a moving object
  • Gravitationalpotential energy
  • The energy of anobject due to its position
  • Elastic energy
  • The energy storedin a springy objectwhen we stretch or squash it
  • Electrical energy
  • The energytransferred by an electric current
  • Thermal energy
  • The energy due tothe temperature of an object
  • Joules (J)
  • The unit of energy
  • Watt (W)
  • The unit used to measure power. 1 watt is 1 joule ofenergy transferred each second
  • Kilowatt (kW)
  • is equal to 1000 watts
  • Kilowatt-hour (kWh)
  • the energy suppliedto a 1kW device in 1 hour
  • Transformer
  • used to increase(step up) or reduce (step down) the voltage
  • Solar cells
  • transfers energy from the Sunsradiation directly into electricity
  • Solar panel
  • these absorb energy from thesuns radiation and transfer it as thermal energy (heat)
  • Geothermal energy
  • thermal energy (heat) from inside the Earth. It is produced from the natural decay ofradioactive material including uranium
  • Non-renewable energy
  • energy that gets used up and willeventually run out
  • Turbine
  • this is made to turn by moving water, steam or wind. It transfers kinetic (moving) energy from themoving substance as its own kinetic
  • Greenhouse effect
  • the Earth being keptwarm by gases such as carbon dioxide in the atmosphere. Burning fossil fuels produces more carbon dioxide and so increases the greenhouse effect
  • Global warming
  • the earthstemperature risingdue to the effect of increased greenhouse gases
  • Efficiency
  • the fraction (orpercentage) of theenergy supplied to a device that is usefully transferred
  • Nuclear fuels
  • radioactivesubstances such as uranium andplutonium that are used for nuclearfission in a nuclear power station
  • Acid rain
  • rain that is more acidic than usual because of dissolved sulphurdioxide or nitrogen oxides
  • Tidal barrage
  • a dam built across a river estuary sothat electricity canbe generated from the tides.
  • Hydro-electricity
  • electricitygenerated using the gravitationalpotential energy of water stored behind a dam
  • End