Section 15.3 Energy Resources Answer Key Pdf !free! Jun 2026

Chemical energy stored in living things (wood, peat, agricultural waste).

: Specifically refers to oil, coal, and natural gas, which formed from the remains of once-living organisms.

Mirrors or photovoltaic cells concentrate or capture sunlight to produce electricity.

Chemical energy stored in living things (like wood or corn). Using turbines to capture kinetic energy from the air. 3. Conserving Energy Resources section 15.3 energy resources answer key pdf

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Section 15.3 of the Pearson Physical Science textbook covers Energy Resources

Nonrenewable energy resources exist in limited quantities and cannot be replaced quickly. Once we use them up, they are gone for millions of years. The three main fossil fuels—coal, oil, and natural gas—along with nuclear fuel (uranium) fall into this category. Chemical energy stored in living things (wood, peat,

Nonrenewable: Coal, oil, natural gas, uranium. Renewable: Solar, wind, hydro, biomass, geothermal.

If you are looking for the answer key to verify your work, the questions generally test your knowledge on the following concepts. 1. Renewable vs. Nonrenewable Resources

| Question | Answer | | :--- | :--- | | | A source of energy that exists in limited quantities and, once used, cannot be replaced except over the course of millions of years. | | 2. List four examples of nonrenewable energy resources. | a. Coal b. Oil c. Natural Gas d. Nuclear energy (or uranium) | | 3. Circle the letter of each resource that is considered to be a fossil fuel. | c. oil & d. coal | | * 4. Is the following sentence true or false? Although fossil fuels are evenly distributed throughout Earth, they only represent ten percent of total energy consumed. * | False . Fossil fuels are not evenly distributed, and they represent the vast majority (over 80%) of energy consumed globally. | | 5. What are some advantages and disadvantages of using fossil fuels as a source of energy? | Advantages: Abundant, provide a stable energy source, and are relatively inexpensive to extract. Disadvantages: They are nonrenewable and contribute to air pollution and climate change. | | 6. An energy resource that can be replaced in a reasonably short period of time is called a(n) ______ resource. | renewable | | 7. Circle the letter of each sentence that is true about renewable energy resources. | a. Wind and solar energy are both renewable energy resources. & c. Renewable energy resources can be used to generate electricity and to heat homes. | | 8. Describe one energy conversion that takes place during the generation of hydroelectric power. | The potential energy of water stored behind a dam is converted into kinetic energy as it flows, which is then converted into mechanical energy to spin a turbine, which finally converts it into electrical energy. | | * 9. Is the following sentence true or false? One disadvantage of hydroelectric power is that it is among the most expensive energy sources. * | False . Once a dam is built, the energy it produces is very inexpensive. | | 10. Water pumped below ground is converted to steam. | c. geothermal | | 11. The most likely raw material is hydrogen. | f. nuclear fusion | | 12. Mirrors concentrate sunlight to produce electricity. | b. solar | | 13. Kinetic energy of moving air is converted into rotational energy of a turbine. | d. wind | | 14. Energy is obtained from flowing water. | a. hydroelectric | | 15. Chemical energy stored in wood, peat, and agricultural waste can be converted into thermal energy. | e. biomass | | * 16. Is the following sentence true or false? Hydrogen fuel cells generate electricity by combining hydrogen with oxygen. * | True . | | 17. What are two ways that energy resources can be conserved? | (1) Using more efficient devices and (2) using alternative energy sources that don't deplete finite resources. | | 18. Name two practical ways in which people can conserve energy. | Students may suggest turning off lights, walking/biking instead of driving, using energy-efficient appliances, or insulating their homes. | Chemical energy stored in living things (like wood or corn)

Devices that react hydrogen with oxygen to generate electricity, producing only water as a byproduct. 3. Comparing Energy Resources: Pros and Cons Energy Source Main Advantage Main Disadvantage Fossil Fuels Cheap and reliable High pollution and greenhouse gases Nuclear No air pollution Produces radioactive waste Solar / Wind Clean and limitless Intermittent (depends on weather) Hydroelectric Highly efficient Disrupts river ecosystems 4. Energy Conservation and Efficiency

Chemical energy stored in wood, peat, and agricultural waste.

A is a source of energy that can be replenished naturally in a relatively short period of time. Common examples include:

Using less energy (e.g., turning off lights).