CHAPTER 4 SECTION 3

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CHAPTER 4 SECTION 3

• NATURAL RESOURCES

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SUSTAINING SOIL RESOURCES

• Soil Exhausting- Soil becomes useless for
  farming because of overuse (Nutrient Loss)
• Soil Salinization can become a problem

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• Positive Methods To Stop This Include
• 1)Fertilizer
• 2)Crop Rotation (planting different crops in
  alternating years)
• 3) Irrigation (water is artificially supplied to
  the land

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• Deforestation- Destruction or loss of forest
  (cleared for logging, farmland) is way ahead of.
  . .

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• Reforestation (replanting of forests) which has
  greatly contributed to soil erosion

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THE QUALITY OF OUR AIR

• Humans, animals, plants need the gases in
  the air to survive-
• POLLUTION threatens us

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• 1) Smog-The mixing of chemicals (from cars
  factories) with sunlight (ex.-L.A. Mex. City)

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• 2) Acid Rain-The mixture of chemicals with water
  vapor in the atmosphere (damages trees kills
  fish)

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• 3)Ozone Layer (Protects us from the suns
  ultraviolet rays which cause skin cancer) can be
  damaged by certain types of air pollution which
  also contribute to Global Warming

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• Mineral Resources- Solid Substances that come out
  of the ground such as
• metals (aluminum to zinc making products from
  airplanes to soft drink cans).

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• rocks (limestone which is cut into blocks for
  building)
• salt

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• Minerals are extracted from holes in the ground
  called Mines, the mineral bearing rock is called
  Ore

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• Mineral Recycling- Very important, the more we
  recycle, the slower we will use up non-renewable
  resources

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• (aluminum, copper, steel are the most often
  recycled minerals)
• You can make money.

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• Energy is the most important non-renewable
  resource in the world,
• these resources called Fossil Fuels (formed from
  the remains of ancient plants animals)

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• Coal was the 1st FF to be used for heat energy
  (plentiful)

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• Petroleum ( also called oil), 1st used as lamp
  fuel,
• today is made into gas, diesel, heating fuel,
  asphalt, many other products

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• Natural Gas- used for home industrial heating
  (plentiful)

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HOMEWORK 3 (PGS.76-81)

• 1)What are the 3 most important uses of forests?
• 2)What 5 products do we get from forests?

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• 3)DefineA)Aqueducts B) Wells C) Aquifers D)
  Fossil Water

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• 4)What are the main 3 uses of minerals?
• 5A)What are Petrochemicals?
• 5B)What are some of its uses?

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• 6)What is the negative of burning fossil fuels?

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• 1)Protect soil from erosion, provide habitats for
  many different species, yield useful products
  2)wood, food, medicine, oils, rubber
  3A)artificial channels for transporting water B)
  holes dug to groundwater, using pumps to bring
  the water to the surface C) rock layers where
  groundwater is plentiful D) very old groundwater

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• 4)construction, jewelry manufacturing
  5A)products made from oil 5B) explosives, food
  additives, medicines, pesticides plastics
  6)carbon dioxide (a greenhouse gas) is
  released-keeps extra heat in the atmosphere-GW

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• 2)What 4 factors must be present for the soil to
  support plant life?
• 3)What 2 factors determine soil composition?

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• 4) Name the 3 layers of the soil called the soil
  horizon.

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• 5)What is a big factor in determining how fertile
  the soil is?
• 6)What do soil profiles vary according to?( 2
  factors)

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ANSWERS TO BR 3

• A)Physical material making up part of the earth
  that people need value
• B) Those that natural processes continually
  replace
• C) Cannot be replaced after being used
• D) Rocky material including both rocky sediment
  organic matter

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• E) Mixture of plant animal material broken down
  by bacteria, Insects Worms near the surface
• F) The downward movement of humus minerals in
  soil
• G) The soil horizons at any place

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• 2)Weathered rock material, organic matter, gasses
  water
• 3) The parent rock, climate
• 4) (A) horizon called topsoil, (B) horizon called
  subsoil is the middle layer, (C) horizon which is
  weathered or broken rock

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• 5) The amount of leaching that has taken
  place-the lower the minerals humus have fallen
  the less fertile the soil is likely to be
• 6) Climate major vegetation