Chapter 5 energy and energy resources
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Chapter 5 Energy and Energy Resources. Section 1 What is Energy? Section 2 Energy Conversions Section 3 Conservation of Energy Section 4 Energy Resources. Section 1 What is Energy. Right. Energy and Work: Working Together Energy is the ability to do work Kinetic Energy

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Chapter 5 Energy and Energy Resources

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Chapter 5 energy and energy resources

Chapter 5Energy and Energy Resources

Section 1 What is Energy?

Section 2 Energy Conversions

Section 3 Conservation of Energy

Section 4 Energy Resources


Section 1 what is energy

Section 1 What is Energy

Right

  • Energy and Work: Working Together

    • Energy is the ability to do work

  • Kinetic Energy

    • The energy of motion

      Kinetic energy = mv2

      2

  • Example:

    • What is the kinetic energy of a car with a mass of 3000 kg traveling at 30 m/s?


Chapter 5 energy and energy resources

Right

  • Potential Energy

    • Energy an object has because of position

  • Gravitational Potential Energy (GPE)

    • The energy of an object’s mass and height above the ground

    • GPE is at a maximum at the top

      • If you are on a trampoline, your GPE is at a max at the top of your jump

        GPE = weight x height

  • Example Problem

    • What is the GPE of a 640 N diver standing on a platform 4 m high?


Chapter 5 energy and energy resources

Right

  • Mechanical Energy

    • The total energy of motion and position of an object

    • Juggling a pin

    • A baseball falling through the air

      Mechanical energy = potential energy+ kinetic energy

  • Example problem

    • A pin being juggled has a potential energy of 20 J and a kinetic energy of 600 J, what is the pin’s mechanical energy?


Other energy forms

Other Energy Forms

Right

  • Thermal

    • Due to random motion of particles

    • Any time an energy conversion occurs, some of the original energy converts to thermal, Ex: A hairdryer

  • Chemical

    • Comes from a compound that changes as its atoms are rearranged, Ex: Energy in food

  • Electrical

    • Energy of moving electrons, Ex: An amplifier and microphone

  • Sound

    • Caused by an objects vibrations, Ex: stretch a guitar string

  • Light

    • Produced by the vibrations of electrically charged particles

  • Nuclear

    • The energy that comes from the nucleus of an atom


Mini book construction

Mini Book Construction

Left

  • Title:

    • Chapter 5 Energy and Energy Resources

  • On the tabs:

    • Types of Energy

    • Energy Conversions

    • Conservation of Energy

    • Energy Resources


Cut paste and identify each energy type

Cut, Paste and Identify each energy type

Left


Section 2 energy conversions

Section 2: Energy Conversions

Right

  • Energy Conversion

    • Change from one form of energy to the other

  • Elastic Potential Energy

    • The type of energy a rubber band has when you wind it on a toy airplane

    • The energy you put into stretching the rubber band


Energy conversions

Energy Conversions

Left


Mini book construction1

Mini Book Construction

  • Tab: Energy Conversions

  • Define energy conversion, pg. 132

  • Define Elastic potential energy

  • Give 2 examples of each:

    • Conversions in Chemical Energy, pg 133

    • Conversions in Electrical Energy

  • What is the role of energy conversions in Machines? Give an example machine that converts and what does it do? (pg 137)


Section 3 conservation of energy

Section 3: Conservation of Energy

Right

  • The Law of Conservation of Energy

    • After energy conversions, you end up with the same total amount of energy as the original amount of potential energy

    • Energy before = Energy after


Section 3 conservation of energy1

Section 3: Conservation of Energy

Left


Section 3 conservation of energy2

Section 3: Conservation of Energy

Left


Mini book construction2

Mini Book Construction

  • Tab: Conservation of Energy, page 138

  • ____ is a force that opposes motion between two surfaces that are in contact.

  • The law of conservation of energy states that ….

  • Give 2 examples of how thermal energy is always a result of energy conversion.

  • Perpetual motion is impossible because ….


Section 4 energy resources

Section 4: Energy Resources

Right

  • Nonrenewable resources cannot be replaced or are replaced more slowly than they are used up

    • Fossil Fuels: oil, natural gas, coal; formed by the buried remains of plants and animals from millions of years ago


Everyday uses of some fossil fuels

Everyday uses of Some Fossil Fuels

Right

  • The US primary source of electrical energy is generated by burning fossil fuels

  • Fossil fuels are energy resources from buried remains of plants and animals that lived millions of years ago.

  • Fossil Fuels contain stored energy from the sun.

    • Concentrated forms of the sun’s energy


Section 4 energy resources1

Section 4: Energy Resources

Left


Converting fossil fuels into electrical energy

Converting Fossil Fuels into Electrical Energy

Left

  • An electric generator converts energy of one type into another - Electric Company - Electricity

petroleum


Mini book construction3

Mini Book Construction

  • Tab: Energy Resources, page

  • Create a table – Advantages and Disadvantages of Energy Resources (list one of each, Fossil Fuel-Biomass)

Non Renewable Resources

Renewable Resources

Ex. 1

Ex. 2

Ex. 3

Ex. 1

Ex. 2

Ex. 3


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