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5.1: Earth's Energy

Difficulty Level: At Grade Created by: CK-12
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Lesson 5.1: True or False

Name___________________ Class______________ Date________

Write true if the statement is true or false if the statement is false.

_____ 1. Plants make food using energy from soil nutrients.

_____ 2. Fossil fuels are made of minerals and rocks.

_____ 3. Uneven heating by the sun causes wind.

_____ 4. The sun’s energy drives the water cycle.

_____ 5. Kicking a soccer ball changes kinetic energy to potential energy.

_____ 6. The head of a match stores chemical energy.

_____ 7. It takes millions of years for fossil fuels to form.

_____ 8. Most fossil fuels will last for another 500 years.

_____ 9. Trees are a source of biomass energy.

_____ 10. Geothermal energy is a nonrenewable resource.

Lesson 5.1: Critical Reading

Name___________________ Class______________ Date________

Read this passage based on the text and answer the questions that follow.

Types of Energy Resources

Energy resources can be put into one of two categories: nonrenewable or renewable. Nonrenewable resources are used faster than they can be replaced. In contrast, renewable resources can be replaced as quickly as they are used or are so abundant that they will never run out.

The most widely used nonrenewable energy resources today are fossil fuels. Fossil fuels include coal, oil, and natural gas. Millions of years ago, plants and other living things used energy from the sun to form carbon compounds. Over millions of years, these compounds were transformed into coal, oil, or natural gas. Fossil fuels are nonrenewable because they take so long to form. We will use up most fossil fuels in a matter of decades. Burning fossil fuels also releases large amounts of pollutants into the air and releases the greenhouse gas carbon dioxide.

Renewable energy resources include solar, water, wind, biomass, and geothermal energy. The sun will continue to shine for billions of years, so solar energy will not run out no matter how much we use. Water naturally flows from higher to lower places, and wind naturally blows from areas of higher to lower pressure. We can use moving water and wind to generate electricity, and we can count on wind and water to continue to move. Wood, which can be burned to produce heat and light, is one source of biomass energy. Grain plants can be used to make biofuels, another source of biomass energy. Biomass resources are renewable because we can plant more trees or other plants to replace the ones we use. Geothermal energy is the energy of hot rocks beneath Earth’s surface. It can be used to heat water and generate electricity. Like solar energy, geothermal energy will last for billions of years.


  1. How do renewable resources differ from nonrenewable resources?
  2. What are fossil fuels, and how do they form?
  3. What are drawbacks of using fossil fuels for energy?
  4. Identify three renewable energy resources. Explain why each of these energy resources is renewable.

Lesson 5.1: Multiple Choice

Name___________________ Class______________ Date________

Circle the letter of the correct choice.

  1. Sources of energy on Earth include the
    1. sun.
    2. planet’s internal heat.
    3. decay of radioactive elements.
    4. all of the above
  2. What happens when energy changes form?
    1. Some of the energy is lost.
    2. The amount of energy increases.
    3. The energy is generally used up.
    4. The amount of energy remains the same.
  3. An example of potential energy is a child who is
    1. running.
    2. swimming.
    3. sitting at the top of a slide.
    4. none of the above
  4. An example of kinetic energy is a child who is
    1. running.
    2. swimming.
    3. sliding down a slide.
    4. all of the above
  5. Most electricity used in homes comes from
    1. batteries.
    2. power plants.
    3. biomass fuels.
    4. solar energy.
  6. Which statement is true of all renewable resources?
    1. They will never run out.
    2. They can be used unsustainably.
    3. They have no drawbacks.
    4. none of the above
  7. The energy stored in fossil fuels came originally from
    1. rocks.
    2. magma.
    3. the sun.
    4. dinosaurs.

Lesson 5.1: Matching

Name___________________ Class______________ Date________

Match each definition with the correct term.


_____ 1. any material that stores energy and releases it in a chemical change

_____ 2. law that energy cannot be created or destroyed

_____ 3. energy that has the potential to do work

_____ 4. coal, oil, or natural gas

_____ 5. ability to move or change matter

_____ 6. form of energy obtained from food

_____ 7. energy of moving matter


a. energy

b. chemical energy

c. kinetic energy

d. fossil fuel

e. potential energy

f. conservation of energy

g. fuel

Lesson 5.1: Fill in the Blank

Name___________________ Class______________ Date________

Fill in the blank with the appropriate term.

  1. Anything that moves or changes in any way needs __________.
  2. Almost all the energy on Earth comes from the __________.
  3. When fuel is burned, most of the energy is released as __________.
  4. __________ resources are used faster than they can be replaced.
  5. Burning fossil fuels releases the greenhouse gas __________.
  6. The greatest energy sources for modern society are __________.
  7. Solar, wind, and biomass energy are all __________ resources.

Lesson 5.1: Critical Writing

Name___________________ Class______________ Date________

Thoroughly answer the question below. Use appropriate academic vocabulary and clear and complete sentences.

Describe how you use energy throughout a typical day, and identify the sources of the energy you use.

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