Section 15.3 Energy Resources Answer Key — Pdf

Gravitational potential energy (from water behind a dam) is converted into kinetic energy (flowing water) and then into electrical energy. Q: How can we make present energy resources last longer? conserving energy (reducing needs) and increasing the efficiency of energy-using devices.

: These exist in limited quantities and take millions of years to replace. Major examples include: Fossil Fuels : Coal, oil (petroleum), and natural gas. : Uranium used in fission. Renewable Energy Resources

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Used primarily to generate electricity and provide transportation fuel.

If you have a PDF worksheet for this section, it likely asks questions about energy conservation, the formation of coal, or the mechanics of a hydroelectric dam. Gravitational potential energy (from water behind a dam)

: Conservation is achieved by reducing energy needs (e.g., turning off lights) and increasing the efficiency of energy use (e.g., using fuel-efficient cars). Quick Review Table Resource Type Key Characteristic Nonrenewable Coal, Oil, Natural Gas, Uranium Limited supply; high pollution Renewable Wind, Solar, Hydroelectric, Geothermal Replenished quickly; lower pollution Common Worksheet Questions

These can be replaced in a relatively short period of time. As technology improves, these are becoming more viable: Hydroelectric: : These exist in limited quantities and take

While inexpensive, their use creates air pollution and adds to the greenhouse effect. Q: Describe an energy conversion in a hydroelectric plant.