Energy
In order to work, a toaster needs electrical energy.

Energy

In this KS2 Science quiz we look at energy in its many forms such as thermal (heat), radiant (light) or kinetic (movement).

Energy is strength and power. All work requires energy. In fact, everything we do uses energy - even blinking! You might think energy is only found in food or in fuel, such as petrol, but did you know that everything in the world contains energy? It comes in many forms. Heat, light, sound, movement, electric - these are all different kinds of energy. Energy cannot be created or destroyed - but it can (and often is) changed from one form into another.

We've told you about heat, light, sound, movement and electric but how many more forms of energy do you know? Which unit do we use to measure energy? What do we call electrical energy which comes from sources such as the Sun? Play this science quiz and test yourself.

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  1. Stored energy is called what?
    'Potential' means 'possible'. Potential energy can become another form of energy, such as kinetic. A stretched spring would contain potential energy
  2. In order to work, a toaster needs what?
    A toaster uses electrical energy, which it converts to heat and light - you use kinetic energy when you put the bread in the toaster and press the lever
  3. Children skipping rope are converting stored energy (from the food they've eaten) into which form of energy?
    Kinetic means 'movement'
  4. Which of these is not an example of kinetic energy?
    Wood is an example of stored, or potential, energy
  5. Which of these is not an example of potential energy?
    A beam of light is radiant (light) energy
  6. Energy is measured in what?
    Degrees Celsius measure temperature, metres measure distance and grams measure mass or weight
  7. Which of these is not a form of energy?
    'Power' is often used as another word for 'energy', but it is not a form of energy. Other forms of energy include: radiant (light), electrical, nuclear and gravitational potential energy
  8. What do we call electrical energy which comes from sources such as the Sun, the wind or waves?
    The wind, the waves and the Sun will not run out for billions of years and so they are renewable
  9. What do we call fuel sources such as coal, oil and natural gas?
    Coal, oil and natural gas are all 'fossil fuels' that took millions of years to form under the ground. Because they cannot be easily replaced, they are called 'non-renewable' energy sources
  10. What happens to the energy you store in your body?
    Energy cannot be created or destroyed, but it can change into other forms - this is called the 'Law of Conservation of Energy' - did you know that most of your body's energy is converted to heat?

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