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