The Natural World

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The Natural World

• Renewable Resources
• Nonrenewable Resources
• Inexhaustible Resources

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Try to imagine a world without the natural
resources we use to fuel our cars, light our
homes and pave our highway. Natural resources
run our cars, rocket ships, video games,
factories, and practically our entire lives.
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All forms of transportation-walking, riding a
bus, riding your bike or horse, or driving a
car-use energy. However, some forms use energy
that can be renewed, and some use energy that
cant be renewed.
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We can divide all sources of energy and materials
into three categories inexhaustible, renewable,
and nonrenewable.
inexhaustible
renewable
non-renewable
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What is a resource?
Resource Natural materials that are considered
valuable.
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Inexhaustible Resources
Inexhaustible Resources Resources that have no
practical limits, such as solar or hydrothermal
energy.
Inexhaustible resources, such as sunlight, cannot
be used up. Water is considered inexhaustible
because the Earth will always have the same
amount of water
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Renewable Resources

• Renewable Resources
• Resources that can be replaced over a relatively
  short time period, such as fresh water,
  hydroelectric power, or living resources.
• Renewable Resources are resources that can grow
  again and will last (as long as they are not
  overexploited).

Air, wood, cotton, food, water, land, trees,
fish, fertile agriculture, soils, crops and
wildlife are renewal natural resources.
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Non-renewable Resources
Non-renewable Resources include minerals and
fossil fuels.
Non-renewable Resources Resources that
accumulate over such a long period of time that
they must be considered as fixed, such as
minerals or fossil fuels.
For example, fossil fuels, which are the remnants
of prehistoric organisms, take millions of years
to form.
Aluminum, tin, copper coal, oil, and natural gas
are examples of non-renewable resources.
These exist in limited quantities and cant be
replenished by natural processes within the
foreseeable future.
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