chapter 20 questions for review
1.) Drive less, take the stairs, insulate your house and add more insulation to the existing amount, turn thermostats down in the winter and up in the summer, eat locally grown food in season.
2.) Net energy yield is based on the total useful energy produced during the lifetime of an entire energy system minus the energy required to make useful energy available. Nuclear power, and hybrid cars are good examples.
3.) Active solar energy generally pumps a heat-absorbing, fluid medium through a relatively small collector, rather than passively collecting heat in a stationary medium like masonry. Passive uses natural materials or absorptive structures with no moving parts to simply gather and hold heat.
4.) Capture solar energy and convert it directly to electrical current by separating electrons from their parent atoms and accelerating them across a one way electrostatic barrier formed by the junction between two different types of semiconductor material.
5.) Fuel cells are devices that use ongoing electrochemical reactions to produce an electric current.
6.) Problems with burning wood in industry are the film it creates on things near the source, also the high amounts of carbon monoxide and hydrocarbons emitted.
7.) Methane is produced by anaerobic decomposition of any moist organic material. It is a fuel that burns efficiently.
8.) Hydroelectric dams are very efficient and don’t hurt the air, however they do affect water flow, and can damage aqueous habitats.
9.) Ethanol, methanol, and bio fluid.
10.) Tidal power or ocean wave power generate electricity by tidal stations’ turbines spinning as the tide flows through them.
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