Gr7 - Energy and Mechanical Systems Quiz
24 Questions
2 Views

Choose a study mode

Play Quiz
Study Flashcards
Spaced Repetition
Chat to lesson

Podcast

Play an AI-generated podcast conversation about this lesson

Questions and Answers

What is thermal transfer?

  • The movement of heat energy from one area or object to another (correct)
  • The transfer of kinetic energy from a warmer area to a cooler area
  • The process of creating heat energy from electrical energy
  • The conversion of heat energy into kinetic energy

    • In thermal systems, why is one substance described as being warmer than another?

  • Because it has more thermal energy (correct)
  • Because it has more potential energy
  • Because it has more kinetic energy
  • Because it has more electrical energy

    • What happens to heat energy in a thermal transfer process?

  • It is converted into potential energy
  • It moves from a warmer area or object to a cooler one (correct)
  • It is evenly distributed within the same area or object
  • It is absorbed by the surroundings

    • What is the role of the electrical element in household appliances like kettles?

    <p>It heats up and warms the water or air inside the appliance</p> Signup and view all the answers

    What happens to the hot water in the kettle according to the thermal transfer flow diagram?

    <p>The water begins to boil</p> Signup and view all the answers

    What happens to the heat energy in the hot tea when it is poured into a cup?

    <p>It moves from the tea to the surrounding air</p> Signup and view all the answers

    How is thermal imaging used in diagnosing injuries in people?

    <p>To see where there might be injuries by detecting heat coming off various body parts</p> Signup and view all the answers

    What is the relationship between the kinetic energy of particles and the temperature of a substance?

    <p>The warmer a substance, the greater kinetic energy its particles have</p> Signup and view all the answers

    What is the primary source of initial energy in the electric kettle system?

    <p>Electricity supply to the kettle</p> Signup and view all the answers

    What is the main purpose of the electrical element in household appliances like geysers, stoves, and kettles?

    <p>To heat up and warm the water or air inside the appliances</p> Signup and view all the answers

    What is the process of thermal transfer?

    <p>The movement of heat energy from one area or object to another</p> Signup and view all the answers

    What happens to heat energy in a thermal transfer process?

    <p>It moves from a warmer area or object to a cooler one</p> Signup and view all the answers

    In a simple electrical circuit, what causes the bulb to shine?

    <p>The flow of electric current</p> Signup and view all the answers

    What type of energy in the arm muscles of the bowler is transferred to the cricket ball as kinetic energy?

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

    In the context of the cricket example, what energy transfer results in a change in direction and speed of the cricket ball?

    <p>Potential energy in the batsman's muscles to kinetic energy in the cricket bat</p> Signup and view all the answers

    What is a common example of a simple mechanical system?

    <p>Using a pair of scissors to cut paper</p> Signup and view all the answers

    In the waterwheel example, what turns the water wheel?

    <p>Energy from falling water</p> Signup and view all the answers

    What type of energy causes an electric current to flow in an electrical system?

    <p>Chemical potential energy in the cell (battery)</p> Signup and view all the answers

    In the context of energy transfers in cricket, what is the input when the bowler throws the cricket ball?

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

    What is the output when the batsman hits the cricket ball?

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

    In the context of the energy transfers in cricket, what is the process when the ball speeds towards the boundary?

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

    What is the process when the bowler throws the cricket ball in the context of energy transfers in cricket?

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

    What is the process when the batsman hits the cricket ball in the context of energy transfers in cricket?

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

    What is the output when the ball speeds towards the batsman in the context of energy transfers in cricket?

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

    More Like This

    Use Quizgecko on...
    Browser
    Open
    Browser
    Browser