Week 6

Earth’s Natural Gem
A renewable energy source is any natural resource that replaces at the same rate on
which the resource is used. A non-renewable energy source is any natural source
that forms at a rate that is much lower than the rate that it is consumed.
1. Fossil fuels are combustible materials that took millions of years to form
underneath the earth. It is a general term for buried combustible geologic deposits of
organic materials, formed from decayed plants and animals that have been converted
to crude oil, coal, natural gas, or heavy oils by exposure to heat and pressure in the
earth’s crust over hundreds of millions of years.
2. Biogas is produced by the anaerobic decomposition of organic materials brought

about by certain varieties of bacteria. It burns to generate heat and used in
combustion engines to produce electricity.
3. Geothermal energy is the heat obtained from underneath the earth and carried to
the surface as steam. Work is being done on geothermal systems that pump hot water
into underground hotspots and then use the resulting steam to generate electricity.
4. Hydrothermal energy is the process of obtaining heat or energy from a large body
of water. Water in dams or from waterfalls are the most common sources of
hydrothermal energy.
5. Batteries are voltaic cells that undergo electrochemical processes to produce

electrical energy. It includes dry cells, lead and storage batteries and fuel cells.
6. Solar cells are usually used for powering homes. These cells directly convert
incoming radiant energy from the sun into usable form. Sunlight is directly converted
to electrical energy.
7. Biomass is any organic matter available on a renewable basis. The biomass of wood
is burned directly to provide heat and energy
1. Natural resources are materials or substances such as minerals, forests, water, and
fertile land that are seen in nature and can be used for economic gain.
2. Renewable resources are materials that can be replaced within a person’s lifespan.
3. Non-renewable resources are materials that will take longer than a person’s lifespan
to be replaced.
4. Biogas, geothermal energy, hydrothermal, solar cells, and biomass are considered
as renewable resources, while fossil fuel and batteries are part of non-renewable
resources.
5. Sources of energy are everywhere, however, we must conserve and preserve
all-natural sources since our lives depend on food, water, clothing, houses, transportation,
machines, and technology.
Activity 1
Directions: List examples of renewable and non-renewable resources that can be
found in your home.
Natural Resources
Renewable Non-Renewable
Activity 2
Directions: Complete the table below. Choose your answer from the illustration.
Natural Resources Renewable/Non- How will you conserve

Renewable it?
1.
2.
3.
4.
5.
Activity 3
Directions: Write down the pros and cons of the energy resource illustrated below.
Coal
Advantages:
______________________________________
______________________________________
Disadvantages:
______________________________________
______________________________________
1.
Animal Manure
Advantages:
______________________________________
______________________________________
Disadvantages:
______________________________________
______________________________________
2.
Solar Panels
Advantages:
______________________________________
______________________________________
Disadvantages:
______________________________________
______________________________________
3.
Assessment
Directions: Read each question carefully and encircle the correct answer.
1. Which of the following best describes renewable resources?
A. Substances that can be regrown or replaced over a period.
B. Resources that can be used quickly and cannot be replaced.
C. Anything that can be found outdoor.
D. Materials that can be recycled.
2. Which of the following natural resources are usually used by powering homes
especially in remote areas?
A. Biogas B. Biomass C. Fossil fuel D. Solar cells
3. Which of the following is not part of fossil fuel?

A. Coal B. Oil C. Petroleum D. Dry cell
4. Which is not true about natural resources?

A. It is anything that can be classified as renewable and non-renewable.
B. It is anything that come from nature and people can use it.
C. It is any substance that can be recycled for further use.
D. It is anything limited to factory usage.
5. Which of the following is an example of a non-renewable resource that can be found

at home?
A. Coal B. Furniture C. Rubber D. Wood
6. Any organic materials that are burned directly to provide heat and energy are called
_____.
7. It refers to the process of obtaining heat or energy from a large body of water.
A. Biomass B. Fossil fuel C. Geothermal D. Hydrothermal
8. It is a natural resource that can be found inside our home and can be used by cars,
flashlights, and other materials.
A. Battery B. Coal C. Electricity D. Gas
9. Which of the following is an example of combustible material formed from decayed

plants and converted into another formed that can be used in cooking?
A. Coal B. Fuel C. Gas D. Rubber
10. It is produced by the anaerobic decomposition of organic materials brought about

by certain varieties of bacteria.

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Earth’s Natural Gem

2. Biogas is produced by the anaerobic decomposition of organic materials brought

5. Batteries are voltaic cells that undergo electrochemical processes to produce

Natural Resources Renewable/Non- How will you conserve

3. Which of the following is not part of fossil fuel?

4. Which is not true about natural resources?

5. Which of the following is an example of a non-renewable resource that can be found

9. Which of the following is an example of combustible material formed from decayed

10. It is produced by the anaerobic decomposition of organic materials brought about

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