Energy Flashcards
(16 cards)
What is a renewable energy resource?
An energy source which can be replenished as it is being used up.
Give four examples of renewable energy resources.
- Wind Energy
- Hydro-Electricity
- Tidal Energy
- Solar Energy
Give an example of a non-renewable energy resource.
Fossil fuels (for example coal, oil and gas).
What are the advantages of generating power using gas rather than coal?
• Flexible Generation: Gas power stations have short start-up times so can be switched on/off more readily
• Lower emissions of carbon dioxide
State two disadvantages of using renewable energy resources to generate power.
• Output often determined by external factors (like wind speed), so supply is uncertain
• Generating power through other means is often more efficient and economically beneficial
Explain the environmental impacts of burning fossil fuels.
• Carbon Dioxide contributes to the greenhouse effect, and causes global warming
• Sulphur Dioxide leads to acid rain, which can damage buildings and crops
State three advantages of fossil fuels as an energy resource.
- Reliable: Not dependent on external factors so can generate power anytime
- Can produce large amounts of energy for a given quantity
- Still relatively abundant, so cost-effective
State three advantages of nuclear power.
- Very large amounts of energy for relatively small quantities of fuel
- Doesn’t release greenhouse gases and so doesn’t contribute to climate change
- Low fuel costs
State three disadvantages of nuclear power.
- Produces nuclear waste which is harmful to humans & must be safely stored for centuries.
- Non-Renewable energy source
- Risk of nuclear accidents, which have fatal consequences on humans and the environment
How does hydroelectric power produce energy?
• Rainwater collects behind a dam
• When this water is released, it is used to turn a turbine
• This turbine turns a generator which produces electricity
What are some disadvantages of using biofuels?
• When plants are burned or decay they release COz
• In order to grow biofuels, you need to destroy land which leads to problems because:
• The land could have been natural habitats
• Destroying land may involve burning plants growing on it, which would release COz
• Growing biofuels reduces the land available for growing food
What are the advantages of tidal energy sources?
They do not produce greenhouse gases
• They are quite reliable, as tides happen twice a day
• They are cheap to run as tides are natural, and so are free
What are some disadvantages of using biofuels?
• When plants are burned or decay they release COz
• In order to grow biofuels, you need to destroy land which leads to problems because:
• The land could have been natural habitats
• Destroying land may involve burning plants growing on it, which would release COz
• Growing biofuels reduces the land available for growing food
What are the disadvantages of hydroelectric power?
• The dam may cause flooding
• It can cost a lot to install the required infrastructure
What are some advantages of solar panels?
• They don’t cause harm to the environment
• They are a renewable resource
• They can be used in remote areas where other types of energy are less accessible
Give examples of social factors which may act as a deterrent for certain types of energy production.
• Visual Pollution
• Sound Pollution
(both of these are disadvantages of wind farms)
