Energy - Science

• What type of energy is given out by light?

  Light energy
• What type of energy is given out by heat?

  Heat energy
• What happens to voltage as the distance between the lamp and solar cell increases?

  Voltage decreases as distance increases
• What is the aim of the solar cell investigation?

  • To investigate how distance affects voltage
  • Measure voltage produced at different distances
• What equipment was used in the solar cell investigation?

  A solar cell and a voltmeter
• What is a key advantage of nuclear power stations?

  They do not release harmful greenhouse gases
• What is a disadvantage of nuclear power?

  Radioactive waste is hard to dispose of
• What chemical is used in nuclear power stations?

  Uranium
• How does nuclear energy generate electricity?

  Heat from uranium boils water to produce steam
• What is biomass energy derived from?

  Living things
• How can geothermal energy be used to generate electricity?

  Heat from the earth produces steam to turn turbines
• What are the advantages and disadvantages of wind energy?

  Advantages:

  • Wind is free
  • No greenhouse gases produced

  
  

  Disadvantages:

  • Only works if windy
  • Takes up a lot of space
• What are the advantages and disadvantages of solar energy?

  Advantages:

  • Sunlight is free
  • No greenhouse gases produced

  
  

  Disadvantages:

  • Only works if sunny
  • Expensive to build
• What is renewable energy?

  Energy that can be replenished quickly
• What is the greenhouse effect?

  Too many greenhouse gases trap heat
• What gases are released by burning fossil fuels?

  Carbon dioxide, nitrous oxide, methane
• What is a major problem with fossil fuels?

  They are non-renewable and will run out
• How long will coal last according to estimates?

  210 years
• How is electricity generated in a coal power station?

  Coal is burned to produce steam
• What are the steps in generating electricity from coal?

  1. Coal is burned in a furnace
  2. Water is turned to steam
  3. Steam turns turbines
  4. Generator produces electricity
  5. Transformer reduces voltage for safety
• What is a fossil fuel?

  Remains of ancient living things
• How is oil formed?

  From marine plants and animals buried over time
• How is coal formed?

  From giant plants buried under water and dirt
• What is the main use of natural gas?

  Cooking and heating
• What is the relationship between potential energy and kinetic energy in a car on a ramp?

  Higher potential energy leads to more kinetic energy
• What is the unit of energy?

  Joules (J)
• What is the energy transformation when food is burned?

  Chemical energy transforms to heat energy
• What are the different forms of energy?

  • Light energy
  • Heat energy
  • Sound energy
  • Electrical energy
  • Kinetic energy
  • Nuclear energy
  • Potential energy
  • Elastic potential energy
  • Gravitational potential energy
  • Chemical energy
• What type of energy is found in fuels?

  Chemical potential energy
• What type of energy is associated with objects that are high up?

  Gravitational potential energy
• What type of energy is found in stretched or wound-up objects?

  Elastic potential energy
• What type of energy is associated with movement?

  Kinetic energy
• What type of energy powers appliances in homes?

  Electrical energy
• What is the energy type given out by heat?

  Heat energy
• What is the energy type given out by light?

  Light energy
• What is the definition of energy?

  Ability to do work
• In what units is energy measured?

  Joules (J)
• What is the significance of energy being convertible?

  Energy can change forms but not created or destroyed
• What is the relationship between energy forms?

  Different forms can transform into each other
• What is the energy type associated with movement?

  Kinetic energy