Energy Transformations Flashcards
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Questions and Answers

What type of energy transformation does an electric fan perform?

  • Electric to Light
  • Electric to Motion (correct)
  • Chemical to Mechanical
  • Chemical to Thermal

    • What type of energy transformation does a lamp perform?

  • Electric to Light (correct)
  • Potential to Kinetic
  • Electric to Motion
  • Chemical to Thermal

    • What type of energy transformation does an iron perform?

  • Thermal to Mechanical
  • Chemical to Thermal
  • Electric to Thermal (correct)
  • Potential to Kinetic

    • What type of energy transformation occurs in an automobile?

    <p>Chemical to Thermal to Mechanical</p> Signup and view all the answers

    What type of energy transformation does a tape player with batteries perform?

    <p>Chemical to Electric to Motion to Sound</p> Signup and view all the answers

    What is the best definition for kinetic energy?

    <p>The energy of movement</p> Signup and view all the answers

    What happens to the height of a tennis ball rebound after it bounces on the floor?

    <p>The ball comes back to some fraction of the height it was dropped from originally</p> Signup and view all the answers

    What is the best definition for potential energy?

    <p>The energy is stored</p> Signup and view all the answers

    What percentage of energy can be transformed when energy transitions from potential to kinetic?

    <p>Less than 100</p> Signup and view all the answers

    Why does an object slow down when you stop pushing it?

    <p>There are forces working opposite to the movement to slow it down</p> Signup and view all the answers

    When is the energy of the rubber band inside a can completely stored?

    <p>When the rubber band is wound and the object is stopped</p> Signup and view all the answers

    Which of the following are all forms of energy?

    <p>Light, Electrical, Mechanical, Heat</p> Signup and view all the answers

    Which energy transformations are needed to light up a light bulb using a generator?

    <p>Chemical Potential to Electric to Mechanical to Light</p> Signup and view all the answers

    What is the transformation for an electric fan?

    <p>Electrical to Mechanical</p> Signup and view all the answers

    What energy transformation occurs in a speaker?

    <p>Mechanical to Sound</p> Signup and view all the answers

    What type of energy transformation does a match make?

    <p>Chemical to Heat</p> Signup and view all the answers

    What are energy transformations?

    <p>When energy changes from one form to another</p> Signup and view all the answers

    What happens to energy as it is converted from one form to another?

    <p>All energy is transferred</p> Signup and view all the answers

    What is the law of conservation of energy?

    <p>Energy cannot be created or destroyed but it can be transformed</p> Signup and view all the answers

    Where does most radiation come from?

    <p>The sun, visible light</p> Signup and view all the answers

    What is conduction?

    <p>The direct transfer of heat from one substance to another substance that it is touching</p> Signup and view all the answers

    What is convection?

    <p>The transfer of heat by the movement of a fluid</p> Signup and view all the answers

    What is work in terms of energy transfer?

    <p>Transfer of energy through motion</p> Signup and view all the answers

    What is energy?

    <p>The ability to cause change</p> Signup and view all the answers

    What is mechanical energy?

    <p>Total amount of kinetic and potential energy in a system</p> Signup and view all the answers

    What type of energy is represented by moving a skateboard?

    <p>Kinetic energy</p> Signup and view all the answers

    What type of energy does a rock at the edge of a cliff possess?

    <p>Potential energy</p> Signup and view all the answers

    What type of energy is found in a glass of milk?

    <p>Potential energy</p> Signup and view all the answers

    What type of energy is gasoline considered?

    <p>Potential energy</p> Signup and view all the answers

    What type of energy does a basketball passing through the hoop have?

    <p>Kinetic energy</p> Signup and view all the answers

    What type of energy does a dry cell of a battery hold?

    <p>Potential energy</p> Signup and view all the answers

    What type of energy does an acorn hanging from an oak tree possess?

    <p>Potential energy</p> Signup and view all the answers

    What type of energy does a person climbing a ladder represent?

    <p>Kinetic energy</p> Signup and view all the answers

    What type of energy does a piece of celery represent?

    <p>Potential energy</p> Signup and view all the answers

    What type of energy does blowing wind represent?

    <p>Kinetic energy</p> Signup and view all the answers

    Study Notes

    Energy Transformations

    • Energy transformations involve changes from one form of energy to another, such as chemical to kinetic.

    Examples of Energy Transformations

    • Electric Fan: Transforms electric energy into motion.
    • Lamp: Converts electric energy into light.
    • Iron: Changes electric energy into thermal energy.
    • Automobile: Performs transformation from chemical energy (fuel) to thermal energy (engine heat) to mechanical (movement).
    • Tape Player with Batteries: Converts chemical energy to electric energy, then to motion, and finally to sound.
    • Hot Air Balloon: Converts chemical energy to thermal energy, to motion, and can include GPS technology.

    Types of Energy

    • Kinetic Energy: Defined as the energy of movement.
    • Potential Energy: Refers to stored energy.

    Energy Efficiency

    • Energy transformations are not 100% efficient; less than 100% of energy is converted during transformations.

    Motion and Resistance

    • Objects slow down due to opposing forces acting against their motion when no longer pushed.

    Energy in Objects

    • Rubber bands have stored energy when wound and motion is halted.
    • Forms of Energy: Include light, electrical, mechanical, and heat.

    Energy for Lighting

    • Lighting a bulb from a generator involves transforming chemical potential energy to electric energy to mechanical energy, which results in light.

    Heat Transfer Methods

    • Radiation: Heat transfer via electromagnetic radiation, primarily from the sun.
    • Conduction: Direct heat transfer through contact between substances.
    • Convection: Heat transfer through the movement of fluids.

    Energy Concepts

    • Work: Defined as the transfer of energy through motion.
    • Energy: The ability to cause change.
    • Mechanical Energy: Total energy in a system, combining kinetic and potential energy.

    Energy Examples

    • Kinetic Energy: Observed in moving objects like a skateboard or a basketball passing through a hoop.
    • Potential Energy: Found in stationary objects, like a rock at the edge of a cliff, a glass of milk, gasoline, or an acorn hanging from a tree.
    • Movement, such as climbing a ladder or blowing wind, represents kinetic energy.

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    Description

    Test your knowledge of energy transformations with these flashcards. Each card focuses on a specific device and its corresponding energy transformation, such as electric to motion or chemical to thermal. Perfect for students looking to reinforce their understanding of energy concepts.

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