Hydro-electiricty, waves and tides Flashcards
1
Q
What does hydro-electric power use?
A
falling water
2
Q
Advantages for hydro-electric power
A
- can provide immediate demand for electricity
- is reliable to expect from when there is a drought
- no pollution
- easy way to generate energy on a small- scale to remote areas
3
Q
Disadvantages for hydro-electric power
A
- Big impact on the environment, e.g rotting vegetation releases methane and CO2
- could lead to loss of habitat
4
Q
What does wave power use?
A
wave-powered turbines
5
Q
Advantages for wave power
A
- no pollution
- useful for small islands
6
Q
Disadvantages for wave power
A
- spoils the view
- disturbs seabeds
- disturbs habitats
- unreliable as when waves drop, energy drops
7
Q
What do tidal barrages use
A
tides and the sun and moon’s gravity
8
Q
How do tidal barrages work
A
The tide fills up the estuaries and when it is full it is released at a controlled speed
9
Q
Advantages for tidal barrages
A
- no pollution
- reliable as the tide comes twice a day
10
Q
DisadvantageS for tidal barrages
A
- spoils the view
- alters the habitat of the wildlife
- prevents free access to boats
- lower the tide, lower the energy
