Chapter 5
118
anaerobic digestion
barrage
bioconversion
biomass
creosote
electrolysis
ethanol
fermentation
fish lift
gasohol
geothermal energy
heat pump
hydroelectric energy
hydrogen
hydrogen sulfide gas
magma
mantle
methane digester
methanol
methyl alcohol
nacelle
overshot waterwheel
penstock
pyrolysis
tidal fence
undershot waterwheel
waste-to-energy plant
wind turbine
wind velocity profile
The origin of most forms of energy can be traced to the sun. Energy resources can
come in many forms. Renewable energy sources are those sources that can be replaced.
They mainly come from plants and animals. Inexhaustible energy sources are those
sources of energy that will not run out. Some examples of these are the sun, the wind,
geothermal energy, hydroelectric energy, and hydrogen. Virtually every energy source
has some advantages and some disadvantages. Factors affecting the development of
energy resources include technological factors, environmental factors, economic factors,
and sometimes even political factors.
All the following words have been used in this chapter. Do you know their meanings?
Write your answers on a separate sheet of paper. Do not write in this book.
1. The origins of most forms of energy can be traced to:
A. the sun.
B. gravity that creates pressure.
C. heat from within the earth.
D. water.
2. How are fossil fuels formed?
3. True or False? Food can be considered an energy source.
4. Describe several factors that can influence the development of a certain energy
resource.