NONRENEWABLE AND RENEWABLE RESOURCES !

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The Earth's Resources
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• The Earth provides us with many resources .

• These resources are divided up into two main
  groups.

Minerals
Air
Plants
Animals
Water
Fossil Fuels
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Renewable Resources

• A Renewable Resource is a resource, like a tree,
  that can be replaced by natural process like
  growth.

• It can be renewed in a reasonable amount of time
  (about a lifetime or 100 years)

http//www.eia.gov/kids/energy.cfm?pagerenewable_
home-basics
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Air

• Air is one example of a renewable resource.

• Air is considered a renewable resource because
  it can be replaced by living things.

• Our Earth is surrounded by a blanket of air that
  we call the atmosphere.

• It reaches almost 350 miles above the surface of
  Earth.

• Humans and other animals need oxygen to live.

• Plants take carbon dioxide from the atmosphere
  to complete photosynthesis.

• The atmosphere also protects living things from
  the harmful effects of ultraviolet radiation
  given off by the sun.

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Threats to our atmosphere!

• Pollution from cars, homes, and factories now
  threatens our atmosphere.

• The burning of oil, coal, natural gas, and
  gasoline has increased the levels of carbon
  dioxide in the atmosphere.

• Pollution from cars, homes, and factories now
  threatens our atmosphere.

• At the same time, the cutting down of trees and
  the destruction of plant life have reduced the
  productions of oxygen.

• Carbon dioxide in our atmosphere acts as a
  blanket, trapping in heat.

• Some scientists believe that increased levels of
  carbon dioxide have contributed to higher
  temperatures across the globe known as global
  warning.

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Applying what you have learned...

• List two ways in which life on Earth depends on
  the atmosphere.

• It contains oxygen, which is what humans and
  animals need to live.

• The atmosphere also protects living things form
  harmful effects of ultraviolet radiation given
  off by the sun.

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Water

• Water is another renewable resource.

• Water is a renewable resource because
• it can be replenished by the water cycle.

• Three-quarters of the Earths surface is covered
  with water.

• Most of this water is in the worlds oceans.

• The water in lakes, rivers, ponds, and streams
• come from rain and it is known as fresh water.

• About 70 of fresh water is also found in the
  ice caps that cover the North and South Poles.

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• Groundwater- When water soaks into the ground,
  it sinks below until it finally hits a hard
  surface of rock. The water then collects as
  groundwater and flows through the porous rock or
  in underground streams.

LAKE
POND
RIVER
STREAM
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GROUNDWATER
WETLANDS
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Conservation

• Water is a renewable resource because it can be
  replenished by the water cycle.

• Water can also be recycled.

• Waste water can be filtered to remove impurities
  and can then be used again.

• When rivers and lakes become polluted with
  liquid or solid wastes, the use of this precious
  resource is threatened.

• Greater efforts are needed to prevent pollution
  and to reduce unnecessary uses of water.

• These steps can help to conserve our supplies of
  fresh water.

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Nonrenewable Resources

• A Nonrenewable resource is a resource formed by
  the Earth over a million, or even billions, of
  years ago.

• It cannot be renewed.

http//www.eia.gov/kids/energy.cfm?pagenonrenewab
le_home-basics

• For an example, oil, coal, natural gas, copper,
  and other minerals are nonrenewable resources.

• Once used, they cannot be replaced.

COAL
NATURAL GAS
OIL
COPPER
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MINERALS

• Rocks above and below the Earths surface
  contain many valuable minerals.

• The supply of minerals, like gold and iron ore,
  is limited.

• Because such minerals cannot be replanted or
  replaced after they are taken from the ground,
  they are nonrenewable resources.

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Fossil Fuels

• Coal, oil (petroleum), and natural gas are
  special resources.

• They can be burned to release large amounts of
  energy.

• Under normal conditions, coal is a solid, oil is
  a liquid, and natural gas is a gas.

• We burn them to run our car engines, heat our
  homes, power our machinery, and create
  electricity.

• Coal, oil, and natural gas are known as fossil
  fuels.

• They actually come from the remains of ancient
  livings things.

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Coal

• Coal is a brown or black rock formed from plants
  in ancient forests and swamps as long ago as 400
  million years.

• After the plants dies, they decayed and were
  buried under water, dirt, and other living things.

• One million years, heat and pressure changed
  their remains into coal.

• Some coal is soft and brown.

• More pressure and heat turns this soft coal into
  a hard , black coal.

• Today, we burn coal for electricity and heat.

• When burned, coal releases the energy stored by
  plants from the sun many millions of years ago.

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Oil and Natural Gas

• Oil and natural gas are also fossil fuels.

• They were formed by very tiny plants and animals
  in the ocean.

• These living things stored energy, originally
  taken from the sun through photosynthesis.

• When they died, they fell to the ocean floor,
  where mud and sediment covered them.

• Over millions of years, heat and pressure
  changed their soft bodies into crude oil a
  sticky, gooey liquid and natural gas.

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• Today, crude oil is heated and separated into
  different parts to make gasoline and other fuels.

• Ingredients in oil also make plastics and
  chemicals.

• Natural gas is made of gases that usually rise
  above deposits of oil.

• When it burns, it creates less pollution than
  either oil or coal.

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• It takes millions of years for fossil fuels
  coal, oil, natural gas to form.

• They can only be burned once.

• For this reason, they are nonrenewable
  resources.

• Although, nonrenewable resources cannot be
  replaced, the presence of these resources can be
  extended by careful use without waste.

• Conservation helps extend these resources.

• The burning of fossil fuels also causes
  pollution, increasing the amount of carbon
  dioxide in our atmosphere.

• Scientists are therefore looking for new sources
  of energy.

• They want our nation to become less dependent on
  fossil fuels and to create less pollution.

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Nonrenewable Resources
Renewable Resources
Gold
Iron Ore
Oak Trees
Fresh water
Oil (petroleum)
Wild Salmon
Rubber plants
Coal
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Earth's Renewable Resources Notes

• A Renewable Resource is one that can be replaced
  by natural processes like growth.

• AIR- Renewable resource surrounding Earth.

• Water Used for agriculture, energy, and
  recreation.
• Salt water- comes from the oceans.
• Fresh water- comes from ponds, lakes, and
  rivers, streams, and ground water.

• Plants can be replaced by reproduction and
  growth.

• Animals can reproduce

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Earth's Nonrenewable Resources Notes

• A nonrenewable resource is one that was formed
  by Earth over million or even billions of years
  and cannot be replaced.

• Minerals- The supply of minerals is limited and
  cannot be replaced.

• Fossil Fuels- Once a fossil fuel is burned for
  its energy, it cannot be replaced.

• Coal From plants in ancient forests.
• Oil Liquid from ancient sea creatures.
• Natural Gas From ancient sea creatures.

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Earth's Renewable Resources Notes

• A Renewable Resource is one that can be replaced
  by natural processes like growth.

• AIR- Renewable resource surrounding Earth.

• Water Used for agriculture, energy, and
  recreation.
• Salt water- comes from the oceans.
• Fresh water- comes from ponds, lakes, and
  rivers, streams, and ground water.

• Plants can be replaced by reproduction and
  growth.

• Animals can reproduce

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Earth's Nonrenewable Resources Notes

• A nonrenewable resource is one that was formed
  by Earth over million or even billions of years
  and cannot be replaced.

• Minerals- The supply of minerals is limited and
  cannot be replaced.

• Fossil Fuels- Once a fossil fuel is burned for
  its energy, it cannot be replaced.

• Coal From plants in ancient forests.
• Oil Liquid from ancient sea creatures.
• Natural Gas From ancient sea creatures.