5.3 REVIEW
8. A 22-W compact fluorescent lightbulb (CFL) produces as much as light as a 100-W regular lightbulb. How much electric energy in kWh does eACh light bulb use in 10 hours.
(Don't need to know)
4. Which is these energy resources is effectively inexhaustible? (a, b, c, or d).
A. biomass B. fossil fuels C. nuclear energy D. solar energy***
6. Copy and I'll the graphic organizer below to sequence the energy transformations that occur in coal burning electric power plant.
1. The coal contains chemical energy (potential). 2. Thermal energy heats water, producing steam. 3. Steam spins a turbine, changing thermal energy into mechanical energy. 4. The turbine spins a generator, changing mechanical energy into electric energy.
7. Fossil fuels form over millions of years. Use this information to explain why fossil fuels are a nonrenewable energy source.
Because it takes a long time to make them
1. Define fossil fuel in your own words.
Fossil fuels are the remains of ancient organisms that can be burned as an energy source.
2. Compare and contrast fossil fuels and biofuels.
Fossil fuels take longer to make than biofuels because fossil fuels are dead animals from a long time ago, and biofuels are recent dead animals.
3. Conserving energy makes which type of energy resources last longer?
Nonrenewable
5. Copy and fill in the graphic organizer below.
coal&wind similarity- both sources of energies, coal&wind difference- the percent of electric energy provided for coal is 49, and wind is 2
