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Energy resources ppt


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Energy resources ppt

  1. 1. HMMMM.... What do you think nonrenewable resources are? Break it down... Nonrenewable? Resource?
  2. 2. Earth scientists have identified over 3000 minerals. These minerals are, however, NONRENEWABLE RESOURCES - their supply is limited and cannot be replaced. RENEWABLE RESOURCES, such as air, water and plants can be replaced within a human lifetime.
  3. 3. NONRENEWABLE RESOURCES A nonrenewable resource is a natural resource that cannot be re-made or re-grown at a scale comparable to its consumption.
  4. 4. Ores form in the crust in a variety of ways. As magma cools, dense METALLIC minerals sink to the BOTTOM. Layers accumulate and form ORE DEPOSITS within the hardened magma. FORMATION OF ORES:
  5. 5. Some ores form through CONTACT METAMORPHISM. Sometimes hot MINERAL SOLUTIONS spread through small cracks in rocks and form bands called VEINS. LODE: A large number of thick mineral veins.
  6. 6. ORES & WATER: The movement of water helps form ore deposits in TWO ways: 1. Streams carry fragments of minerals (i.e. gold) until they get DEPOSITED by weak CURRENTS. Fragments become concentrated and form PLACER DEPOSITS. 2. Water dissolves MINERALS in the earths crust, and then carry the dissolved minerals until it reaches a placer deposit where it accumulates.
  7. 7. JEWELRY - Sapphires, Rubies, Diamonds JEWELRY - Gold, Silver, Platinum BUILDING MATERIAL - Calcite, Gypsum USES OF MINERAL RESOURCES:
  8. 8. CONSERVATION OF MINERALS: The only sure way to preserve mineral resources is through CONSERVATION. Use other, more abundant substances materials such as PLASTICS. Another way to conserve minerals is to RECYCLE them.
  9. 9. -Because of their organic origin, COAL, PETROLEUM, and NATURAL GAS are known as fossil fuels. - Fossil fuels consist primarily of compounds of CARBON and HYDROGEN called HYDROCARBONS.
  10. 10. COAL (FORMATION AND TYPES): •A dark colored ORGANIC rock. •Formed from dead plants and other organisms •CARBONIZATION: Bacteria consuming buried plant remains, releasing methane and carbon dioxide, leaving only carbon behind.
  11. 11. PEAT: partial decomposition of plant remains. Brownish/black in color. LIGNITE: brown coal BITUMINOUS: soft coal ANTHRACITE: hardest form of all coals. FOUR STAGES OF COAL:
  12. 12. HOW IS COAL MADE ???
  13. 13. PETROLEUM AND NATURAL GAS (FORMATION AND DEPOSITS): Petroleum and natural gas are largely made up of HYDROCARBONS. Petroleum (oil) is LIQUID and natural gas is a GAS. When ancient animals were buried in prehistoric OCEANS and LAKES heat and pressure build up. CHEMICAL changes eventually convert the remains into PETROLEUM and NATURAL GAS.
  14. 14. CRUDE OIL: unrefined petroleum PETROCHEMICALS: chemicals derived from petroleum, essential component of over 3000 products, products include: tar, wax, and plastic USES AND SUPPLIES:
  15. 15. COAL, PETROLEUM, AND GAS Coal, petroleum, and natural gas are considered nonrenewable because they can not be replenished in a short period of time. These are called fossil fuels.
  16. 16. NUCLEAR FISSION: The SPLITTING of the NUCLEUS of a large atoms into two or more smaller nuclei. Only one kind of naturally occurring element can be used for NUCLEAR FISSION, this element is URANIUM-235.
  17. 17. 1. U-235 is mixed with U-238 and formed into PELLETS. 2.The uranium is then shaped into rods called FUEL RODS. 3.Bundles of these FUEL RODS are bombarded by NEUTRONS.
  18. 18. 4. When hit by a neutron, the fuel rod SPLITS and releases NEUTRONS AND ENERGY. 5. This starts a CHAIN REACTION and the split atoms bump into other atoms causing the fuel rods to get very HOT.
  19. 19. 6. Water is pumped around the fuel rods to ABSORB & CARRY AWAY THE HEAT. 7. The resulting HOT WATER / STEAM then is used to turn TURBINES, to generate ELECTRIC energy. Nuclear reactions are contained in a controlled environment called a NUCLEAR REACTOR.
  20. 20. DRAWBACKS: •WASTE PRODUCTS, which give off dangerous radiation •the RADIATION can destroy plants and animal cells and cause harmful changes in the GENETIC MATERIAL of living cells
  22. 22. NUCLEAR FUSION: All of the energy that reaches the earth from the sun is produced by NUCLEAR FUSION. The NUCLEI of the smaller atom HYDROGEN are combined to create an atom of HELIUM.
  23. 23. HMMMM.... If nonrenewable resources are resources that cannot be re-made at a scale comparable to its consumption, what are renewable resources?
  24. 24. Nations are looking into the use of ALTERNATE sources in order to find safe and RENEWABLE energy resources.
  25. 25. RENEWABLE RESOURCES Renewable resources are natural resources that can be replenished in a short period of time. ● Solar ● Geothermal ● Wind ● Biomass  Water Tidal
  26. 26. SOLAR Energy from the sun. Why is energy from the sun renewable?
  27. 27. GEOTHERMAL Energy from Earth’s heat. Why is energy from the heat of the Earth renewable?
  28. 28. WIND Energy from the wind. Why is energy from the wind renewable?
  29. 29. BIOMASS Energy from burning organic or living matter. Why is energy from biomass renewable?
  30. 30. WATER or HYDROELECTRIC Energy from the flow of water. Why is energy of flowing water renewable?
  31. 31. SUMMARY What are the differences between nonrenewable and renewable resources?