6 th  Grade Science  Chapter 17 Energy and Resources Notes Section 17.3
<ul><li>Where does our energy come from? </li></ul><ul><li>Nearly all the energy used today can be traced to the sun.  </l...
Energy Resources <ul><li>The surface of Earth receives energy from two sources—the Sun and radioactive atoms in Earth’s in...
 
Coal, oil, and natural gas are fossil fuels.  Fossil fuels are a nonrenewable resource because we are using the resource m...
Fossil Fuels <ul><li>Coal was formed by similar process from the remains of ancient plants that once lived on land.  </li>...
Using Fossil Fuels <ul><li>Burning fossil fuels to produce energy also generates chemical compounds that cause pollution. ...
Nuclear Energy <ul><li>To obtain electrical energy from nuclear energy, a series of energy transformations must occur.  </...
<ul><li>What is a nonrenewable resource? </li></ul><ul><li>A nonrenewable resource is an energy source that is used up muc...
Hydroelectricity <ul><li>Currently, transforming the potential energy of water that is trapped behind dams supplies the wo...
Solar Energy <ul><li>The Sun is the origin of almost all the energy that is used on Earth.  </li></ul><ul><li>Because the ...
<ul><li>What are examples of alternative resources? </li></ul><ul><li>Examples of alternative resources are solar energy, ...
Wind <ul><li>Modern windmills convert the kinetic energy of the wind to electrical energy.  </li></ul><ul><li>The propelle...
 
Wind power designs old and new.
Using Tidal Energy <ul><li>As the tide comes in, it turns a turbine connected to a generator.  </li></ul><ul><li>When high...
<ul><li>What is a photovoltaic collector? </li></ul><ul><li>A photovoltaic collector is a device that transforms radiant e...
Collecting the Sun’s Energy <ul><li>A  photovoltaic  is a device that transforms radiant energy directly into electrical e...
 
Geothermal Energy <ul><li>At some places deep within Earth the temperature is hot enough to melt rock.  </li></ul><ul><li>...
Geothermal Power Plants
Conserving Energy <ul><li>One way to make the supply of fossil fuels last longer is to use less energy.  </li></ul><ul><li...
<ul><li>Diagram the energy conversions that occur when coal is formed, and then burned to produce thermal energy. </li></u...
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Sect 17.3

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Sect 17.3

  1. 1. 6 th Grade Science Chapter 17 Energy and Resources Notes Section 17.3
  2. 2. <ul><li>Where does our energy come from? </li></ul><ul><li>Nearly all the energy used today can be traced to the sun. </li></ul><ul><li>What are fossil fuels? </li></ul><ul><li>Fossil fuels are coal, oil and natural gas. </li></ul>Key Questions 1
  3. 3. Energy Resources <ul><li>The surface of Earth receives energy from two sources—the Sun and radioactive atoms in Earth’s interior. </li></ul><ul><li>Nearly all the energy you used today can be traced to the Sun, even the gasoline used to power the car or school bus you came to school in. </li></ul>
  4. 5. Coal, oil, and natural gas are fossil fuels. Fossil fuels are a nonrenewable resource because we are using the resource much faster than it is being replaced.
  5. 6. Fossil Fuels <ul><li>Coal was formed by similar process from the remains of ancient plants that once lived on land. </li></ul>
  6. 7. Using Fossil Fuels <ul><li>Burning fossil fuels to produce energy also generates chemical compounds that cause pollution. </li></ul><ul><li>Each year billions of kilograms of air pollutants are produced by burning fossil fuels. </li></ul><ul><li>These pollutants can cause respiratory illness and acid rain. </li></ul>
  7. 8. Nuclear Energy <ul><li>To obtain electrical energy from nuclear energy, a series of energy transformations must occur. </li></ul>
  8. 9. <ul><li>What is a nonrenewable resource? </li></ul><ul><li>A nonrenewable resource is an energy source that is used up much faster than it can be replaced. </li></ul><ul><li>What is a renewable resource? </li></ul><ul><li>A renewable resource is an energy source that is replenished continually. </li></ul>Key Questions 2 The Tadpole Galaxy
  9. 10. Hydroelectricity <ul><li>Currently, transforming the potential energy of water that is trapped behind dams supplies the world with almost 20 percent of its electrical energy. </li></ul>
  10. 11. Solar Energy <ul><li>The Sun is the origin of almost all the energy that is used on Earth. </li></ul><ul><li>Because the Sun will go on producing an enormous amount of energy for billions of years, the Sun is an inexhaustible source of energy. </li></ul><ul><li>An inexhaustible resource is an energy source that can’t be used up by humans. </li></ul>
  11. 12. <ul><li>What are examples of alternative resources? </li></ul><ul><li>Examples of alternative resources are solar energy, wind, and geothermal energy. </li></ul><ul><li>What is a inexhaustible resource? </li></ul><ul><li>An inexhaustible resource is an energy source that can’t be used up by humans. </li></ul>Key Questions 3 The Sombrero Galaxy
  12. 13. Wind <ul><li>Modern windmills convert the kinetic energy of the wind to electrical energy. </li></ul><ul><li>The propeller is connected to a generator so that electrical energy is generated when wind spins the propeller. </li></ul><ul><li>Some disadvantages are that windmills produce noise and that large areas of land are needed. </li></ul>
  13. 15. Wind power designs old and new.
  14. 16. Using Tidal Energy <ul><li>As the tide comes in, it turns a turbine connected to a generator. </li></ul><ul><li>When high tide occurs, gates are closed that trap water behind a dam. </li></ul>
  15. 17. <ul><li>What is a photovoltaic collector? </li></ul><ul><li>A photovoltaic collector is a device that transforms radiant energy directly into electrical energy. </li></ul><ul><li>What is geothermal energy? </li></ul><ul><li>Geothermal energy is heat energy generated inside the Earth. </li></ul>Key Questions 4
  16. 18. Collecting the Sun’s Energy <ul><li>A photovoltaic is a device that transforms radiant energy directly into electrical energy. </li></ul><ul><li>Photovoltaics are used to power calculators and satellites, including the International Space Station . </li></ul>
  17. 20. Geothermal Energy <ul><li>At some places deep within Earth the temperature is hot enough to melt rock. </li></ul><ul><li>This molten rock, or magma, can rise up and close to the surface through cracks in the crust. </li></ul><ul><li>In other places, magma gets close to the surface and heats the rock around it. </li></ul>
  18. 21. Geothermal Power Plants
  19. 22. Conserving Energy <ul><li>One way to make the supply of fossil fuels last longer is to use less energy. </li></ul><ul><li>Reducing the use of energy is called conserving energy. </li></ul>
  20. 23. <ul><li>Diagram the energy conversions that occur when coal is formed, and then burned to produce thermal energy. </li></ul><ul><li>Explain why solar energy is considered an inexhaustible source of energy. </li></ul><ul><li>Explain how a heat pump is used to both heat and cool a building. </li></ul><ul><li>Identify advantages and disadvantages of using fossil fuels, hydroelectricity and solar energy as energy sources. </li></ul>Questions Section 17.3

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