Powering systems Flashcards
1
Q
meaning of finite
A
non- renewable, will run out eventually
2
Q
arguments for the use of fossil fuels
A
- reliable
- cheap
- there’s enough to meet deands
3
Q
arguments against fossil fuels
A
- they’ll eventually run out
- they release greenhouse gases which contribute to climate change and other environmental problems
4
Q
arguments for nuclear power
A
- cheap
- reliable
- clean and produces very low levels of greenhouse gases
5
Q
arguments against nuclear power
A
- uses fuel sources that are finite like uranium
- costs a lot to build and maintain
- waste product is dangerous and difficult to dispose of
- carries a risk of a major disaster like Chernobyl
6
Q
arguments for renewable energy
A
- generally have a smaller environmental impact than other energy resources
- they provide clean energy once they’re set up
- after initial set up costs, the energy is usually free
7
Q
arguments against renewable energy
A
- high initial costs
- some types rely on factors such as weather, so less reliable
- some ruin the view
- some may damage animals environment - e.g - tidal
8
Q
why is there a drive to use more renewable energy
A
- we know about the negatives of fossil fuels
- improved efficiency in renewables becoming a more attractive option
- pressure from other countries
- people think it’s better to learn to get by without non renewables before they run out
9
Q
how does a kinetic pumped storage system work
A
- operates using a hydroelectric power station
- spare night time electricity generated by other power stations is used to pump water in the lower hydroelectric reservoir up to the higher reservoir
10
Q
advantages of alkaline batteries
A
- recyclable
- last long
- leak less, reducing their environmental impact
11
Q
what are alkaline batteries
A
disposable batteries, once used they cannot be used again
12
Q
what is a rechargeable battery
A
batteries that can be charged when it goes flat using a reversible reaction
13
Q
advantages of rechargeable batteries
A
- cheaper in the long run as they can be used over again
- more environmentally friendly then disposables as they can be used more than once
14
Q
where are alkaline batteries used
A
remote controls, torches, clocks
