18.2 Hydropower & Ocean Energy Flashcards
Wave energy is derived from
Wind
Tidal energy is derived from
moon
Multiple Turbines are called a
Wind farm
Hydro Power:
The use of kinetic energy from moving water in order to turn turbines & generate lectricity
The US draws the ___energy from hydropower
most
The US recieves __% of energy from hydropower
6%
Germany recieves __% of energy from hydropower
3.5%
2 default ways of harnessing a river for hydropower
-Dam blocks river, water builds up
-river isn’t blocked yet, energy is still made from the natural movement of
Reson for Hydropower;s unlikelyness to grow
Most major rivers in the world have already been dammed
Function of a dam-hydropower
- Flowing water spins a turbine
- Causing a genertor to create electricity
- Resoivors provide a steady supply
Hydropower Benefits
-renewable
-no pollution of air
-relatively inexspensive
-dams can control floods
-very helpful in nations with many rivers
Hydropoer Disadvatages
-dams drastically effect ecosytems
-may reduce animal populations
-potenial landslides
-can trap helpful natural sediment from reaching downstream
4 countries that receive 50% of energy via hydropower
Canada
Brazil
Norway
Venezuela
Tidal Energy:
Using movement of tidal water to generate electricity
2 main ways to generate tidal energy
- A dam is built across a bay or river, water rises and moves through dam, into bay; water receding passes through turbines
2 main ways to generate tidal energy
- A dam is built across a bay or river, water rises and moves through dam, into bay; water receding passes through turbines
- A concrete box is built apon the ocean and water will rise up through to the turbines
Heat from the earth’s equator could be harness for
20,000 times th electricity used in the US
