Physics

4th -

5thgrade

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Physics: Energy

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11 questions

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  • 1. Multiple Choice
    30 seconds
    1 pt

    The unit of energy is?

    Watt

    Kilojoule

    Kilogramme

    Volt

  • 2. Multiple Choice
    30 seconds
    1 pt

    Complete the statement about the principal of Conservation of Energy.

    Energy can be changed for one form to another but the total amount of energy

    always increases

    always decreases

    does not change

    varies according to the reaction

  • 3. Multiple Choice
    30 seconds
    1 pt

    Conservation of Energy Questions.

    Example: A battery releases 100J of energy to a lamp. The lamp releases 80J of energy as light but it also releases heat energy. How much heat energy is released? Answer=20J ( If he total energy input is 100 and 80 is the output as light, that means that 20 J is left as heat 100J-80J=20J)..Now try these questions..

    Question. A battery releases 200J of energy to a lamp. the energy is converted to heat and light. 50kJ is given out as heat. How much is released as Light?

    100J

    150J

    200J

    250J

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