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Gr.6-What is energy?

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  • Who needs more energy: an athlete or a person who sits all day?
    athlete
  • How many joules are in one kilojoule?
    1000 J
  • Name three fuels that store energy.
    coal, oil, wood
  • Which activity uses the least energy per minute?
    sitting – 6 kJ
  • How much energy does playing football use each minute?
    59 kJ
  • Which food gives the least energy?
    banana – 340 kJ per 100g
  • What old unit was used for measuring energy in food?
    kilocalorie or kcal
  • Is energy a substance that moves from one object to another?
    No, it’s a way to keep track of a quantity.
  • What does “kJ” stand for?
    kilojoule
  • Which activity uses the most energy per minute?
    swimming – 73 kJ
  • What happens if you eat more energy than you need?
    body stores fat
  • What does your body use energy for when you are resting?
    keeping warm, breathing, moving, talking
  • Why do children need extra energy?
    to grow bones, muscles, and brains
  • Which food in the table gives the most energy?
    chocolate – 1500 kJ per 100g
  • What is the unit of energy?
    joule (J)
  • What is the energy content of cooked chicken per 100 g
    800 kJ
  • What do people usually call a kilocalorie?
    a calorie
  • What happens if you eat less energy than you need?
    body uses stored fat and you lose weight
  • What activities does your body need extra energy for?
    walking, running, lifting things
  • How many kilojoules equal 1 kilocalorie?
    4.2 kJ
  • What other things can we use stored energy for?
    heating rooms, cooking food, boiling water, etc.
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