Term
|
Definition
| 1. direct solar energy 2. indirect solar 3. non-solar renewables |
|
|
Term
|
Definition
| 1. solar heating (water and space) 2. Sunlight to electricity (photo-voltaic cells through collectors) |
|
|
Term
|
Definition
| biomass, biofuels, windpower,hydropower |
|
|
Term
|
Definition
| geothermal, tidal & wave power, and nuclear fussion |
|
|
Term
| steps for photo cells to get energy |
|
Definition
| 1. photons that hit a solar cell are absorbed by semiconducting material (silicon) 2. negative electrons are knocked loose from atoms allowing them to flow through material to produce electricity |
|
|
Term
| in photo cells due to special composition of solar cells, the electrons are only allowed to move |
|
Definition
| in one direction from one layer to the other |
|
|
Term
| in photo cells a charge imbalance builds forms that can be restored |
|
Definition
| as a current (DC) electricity |
|
|
Term
| an array of solar cells convert solar energy into |
|
Definition
| a usable amount of direct current(DC) energy |
|
|
Term
| current maximum efficiency of photo cells |
|
Definition
|
|
Term
|
Definition
| directional wind motion converted into rotational motion, and thence into electrical energy |
|
|
Term
| in hydropower water power drives what? |
|
Definition
|
|
Term
| wind and hydropower currently provides ____% of us electricity |
|
Definition
|
|
Term
| there is potential growth in wind energy but not in |
|
Definition
|
|
Term
|
Definition
| steam drives conventional turbogenerator |
|
|
Term
| tides as a non-solar source of energy |
|
Definition
| tidal motion drives turbines |
|
|
Term
|
Definition
| het of elemental fusion converted to electricity by a steam turbogenerator |
|
|
Term
| there ____ (is/isn't) promise in nuclear fusion |
|
Definition
|
|
Term
| 5 disadvantages of renewable energy |
|
Definition
| 1. limited availability 2. not a predictable source 3. more expensive than FF energy 4. has negative environmental effects 5. experimental requires more research |
|
|
Term
| 2 advantages of renewable energy |
|
Definition
| 1. clean, sustainable source of heat, electricity 2. can help reduce demand for fossil fuels |
|
|
Term
| all renewables combined supply ___% of energy world wide |
|
Definition
|
|
Term
| electricity from solar/wind is _____ expensive than electricity from Fossil fuels |
|
Definition
|
|
Term
| recent growth in use of renewables is due to |
|
Definition
|
|
Term
| the government does these three things to encourage renewable energy |
|
Definition
| give subsidies, mandates and tax incentives |
|
|
Term
| who are the biggest promoters of renewable energy? |
|
Definition
| older industrial economies (Europe, Japan, and US) |
|
|
Term
| one reason the gov. is trying to look into renewable energy is because |
|
Definition
| they are trying to reduce carbon foot print because global warming perceived as larger threat that FF depletion |
|
|
Term
| many conclude that renewables ________ be able to fully replace FF's |
|
Definition
|
|
