Topic 1 and Topic 2- Energy and Energy Resources, Energy transfer by heating Flashcards
What does G-E-E-K-S
L-U-N-C-H stand for? (u does not stand for anything)
- Gravitational potential energy
- Electrical energy
- Elastic energy
- Kinetic energy
- Sound energy
- Light energy
- Nuclear energy
- Chemical energy
- Heat (thermal) energy
What is the law of conservation of energy?
Energy cannot be created or destroyed, only transformed into another type of energy
What is the formula for Kinetic energy and what it measured in?
Kinetic energy is measured in Joules, and the formula is [Ek = 1/2 x m x v(squared)
What is wasted energy?
Wasted energy is any energy the comes out of a situation that we didn’t intend it to be there.
For example, In a light bulb, it generates light, heat and sound. The heat and sound is wasted, or is dissipated into the surroundings.
What kind of insulation can you put into a house for it to be more energy efficient?
- Cavity wall insulation
- Double glazing
- Loft insulation
- Carpet
- Curtain
- Draft excluders
- Jacked around hot water tank
What is the formula for efficiency?
Efficiency = Useful energy out/ total energy in
What are the 2 types of sources of Electricity?
Renewable sources and Finite sources
Name some Renewable sources:
Sun
Wind
Water - Tidal
Hydro-ep
Wave
GeothermalWhat are the advantages/ disadvantages of renewable sources?
The advantage of the majority of the renewable sources is that they don’t release carbon dioxide, we are never going to run out of them and they are usually non-polluting.
What are disadvantages to solar energy?
Disadvantage of solar is that it can be expensive to install and isn’t very effective during cloudy days, Wintery days and during Night.
What are disadvantages to Wind Turbines?
Some people do not like wind turbines. They also don’t work very well during non-windy days.
What is a disadvantage to tidal and wave power?
Can be disruptive to the local environment
What is a disadvantage to a hydro-electric dam?
Involves flooding a large area which many include people’s homes or anima’s habitats
What is a disadvantage to Geothermal power?
It can only be used in volcanic areas.
What are the advantages of using fossil fuels or nuclear power?
They are readily available and it’s a cheap source of electricity, and things like coal power stations have a short start up time
What is the disadvantage of using coal, oil and gas?
They take millions and millions of years to create. (we are about to run out of them)
They are very heavily polluting (releases large amounts of carbon dioxide into the atmosphere which contributes to climate change)
What is the disadvantage of nuclear power?
You have to store nuclear radioactive waste for long periods of time
There is a very small but potential risk of explosion
What does energy transferred also equal to?
Work done
