Energy around us. Science 4th grade

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Primary Institute Arkon
Performed by a teacher Sayyora Energy.
Energy around us.
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What is Energy?

• Mrs. Sayyora
• Science 4th gr

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What is Energy?

• The ability to produce change or make things move
• Energy can produce
• Light
• Heat
• Motion
• Sound
• Growth
• Technology

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Can you make things move?

• Then you have energy
• but there are different forms and types of
  energy

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Forms of Energy

• Kinectic
• The energy of motion
• Electrical, Radiant, Thermal, Sound, and
  Mechanical are forms of kinetic energy
• Potential
• Stored energy and energy of position
• Chemical Nuclear energy are potential energy

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Chemical Energy

• What holds atoms in molecules together
• is released by chemical reactions like burning
  wood
• Biomass, petroleum, and natural gas are examples
  of stored chemical energy

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Nuclear Energy

• Energy stored in the nucleus of an atom
• Holds protons and neutrons together in an atoms
  nucleus
• Powers the sun and nuclear power plants

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Electrical Energy

• The movement of electrons through matter
• Electricity lightning are forms of electrical
  energy

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Thermal Energy

• The random motion or vibration of atoms in matter
• The faster the atoms vibrate the more heat energy
  they have
• Geothermal energy is an example of thermal energy

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Radiant Energy

• The energy carried by waves
• Light and solar are types of radiant energy

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Discussion

• Turn to your partner and discuss the difference
  between kinetic potential energy

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Mechanical Energy

• The energy of an object moving from one place to
  another
• Wind energy is a mechanical energy
• When you ride a bike you use mechanical energy

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Sound Energy

• The movement of energy through waves
• The air molecules move tiny bones in your ear
• The message of sound then moves to your brain
• Can also vibrate objects

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Energy can be changed from one form to another

• Chemical energy in gasoline is changed to heat
  energy and then to mechanical energy in a car

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Sources of Energy

• Renewable
• Supplies are replenished frequently
• Biomass, geothermal, hydropower, solar and wind

• Nonrenewable
• Can not be replenished within a short time
• Coal, petroleum, uranium, natural gas are
  examples.

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Petroleum

• is refined into gasoline
• Number one energy source in the U.S.
• Provides 37 of Americas total energy
  consumption.
• Saudia Arabia has the largest known reserves of
  me.
• My major use is for transportation. 

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Coal

• I generate 45.9 percent of the nations
  electricity
• Im Americas most abundant source of energy
• Wyoming, West Virginia Kentucky are states that
  produce me.

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Natural Gas

• I heat more than half of the nations homes.
• Im colorless and odorless.
• Chemical name is methane.
• Industry is my largest consumer in the U.S.
• Im a cleaner burning fossil fuel.

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Uranium

• Im the nations third leading source for
  generating electricity.
• Im presently being used in over 100 locations in
  the U.S.
• I supply about 21 of U.S. electricity.
• I was first used in 1957 to make electricity.
• The U.S. leads the world in production of
  electricity from me.

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Hydroelectric Power

• I supply 5-10 of U.S. electricity, depending on
  the amount of rainfall.
• Im limited to certain geographic areas of the
  U.S.
• I provide 16 of the worlds electricity.
• Im being used in over 2,000 locations in the
  U.S.
• My facilities can disrupt wildlife fish
  populations.

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Biomass

• Methane gas can be made from me.
• Photosynthesis stores radiant energy in me.
• I get my energy from wood, garbage, and
  agricultural wastes.
• I can be used to generate electricity.
• Ethanol can be made from me and used as a
  transportation fuel.
• Burning me can produce air pollution.

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Geothermal

• I produce less than one percent of U.S. Energy.
• Im used mainly in western states.
• I can be used for home heating.
• My energy comes from the Earths core.
• My major use is the production of electricity.
• I get my energy as a result of radioactive decay.

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Wind

• Most of my electricity is from Texas, Iowa,
  western states.
• I convert my motion energy directly into
  electrical energy with no cost for the fuel.
• I produce no air pollution.
• My turbines operate about ¾ of the time.
• I produce almost 2 of U.S. electricity.
• Im caused by uneven heating of the Earths
  surface.

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Solar

• Im not available at all hours of the day.
• I can be converted directly into electricity
  using photovoltaic cells.
• Im great for water and home heating.
• I work better in some parts of the country.
• My energy is stored in fossil fuels.
• Im free to use, but you have to purchase and
  maintain my equipment.

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Discussion

• In your notebook, write down 2 reasons why it is
  important to research renewable energy sources.

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Thank you for your attention Dears. Next lesson
we are going to learn more about energy. Please
learn vocab be ready to get more about energy
on the next lesson. Best wishes. Bye.