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ENERGY - Coggle Diagram

- - - - Electrical energy is energy carried by an electric current along wires.
      - A large amount of electrical energy can be produced by power plants and generators.
      - Energy stored in batteries and solar cells can also be used to transformed into electrical energy.
      - Some examples of the use of electrical energy:
      - Electrical appliances, such as toaster and ovens, convert electrical energy to heat to cook food.
      - When we switch on light bulbs, electrical energy is converted to light energy for us to see the surroundings.
      - Electrical energy is convert to sound energy in speakers so that we can listen to the music that is being played.
  - - - Sound energy is produced when objects vibrate.
      - Obiects that can vibrate are able to produce sound.
      - For example
      - Tuning forks, human vocal cord or drumskin
      - When objects vibrate, they move back and forth very quickly to produce sound.
      - When sound reaches our ears, we can detect it.
  - - - .
        
        Chemical potential energy is energy stored in food, fuels or battery.
        
        For example
        
        Food such as banana, peanuts, meat and rice
        
        Fuels such as coal, oil, wood, charcoal and cooking gas
        
        Battery such as dry cells and car batteries
        
        The chemical potential energy can be released through various processes. The stored energy is then transformed into other forms of energy to do work.
        
        For example
        
        When we carry out respiration, the chemical potential energy in food is released for us to do work.
        
        When wood is burnt, the chemical potential energy is released. It changes into heat and light energy.
        
        When we form a closed circuit, the chemical potential energy in dry cells is released. It changes into electrical energy.
    - - .
        
        On Earth, the gravitational force acts on all objects. Whenever the objects move away from the Earth's surface, they have the energy to fall back to the ground when the gravitational force pulls them downwards. This stored energy is called gravitational potential energy.
        
        Gravitational potential energy is the energy possessed by an obiect due to its position from the ground.
        
        For example
        
        BO
        
        has gravitational potential energy
        
        no gravitational
        
        AD potential energy
        
        Earth's surface
        
        At A, the object does not have gravitational potential energy on the ground.
        
        At B, the object possesses gravitational potential energy when it is raised to a height.
        
        Two factors affecting the amount of gravitational potential energy in an object:
        
        ~ The mass of the obiect ~ The height of the object
    - - .
        
        Elastic potential energy is energy stored in elastic objects that can be stretched, compressed, twisted or bent.
        
        The energy is stored until the force is removed and the object springs back to its original shape, doing work in the process when the elastic potential energy converts into kinetic energy.
        
        For example
        
        When the rubber band of a catapult (or a slingshot) is stretched, it has elastic potential energy. This stored energy can then be used to make a rock move in the air (to do work).
        
        a stretched rubber band has elastic potential energy
        
        A twisted rubber band has elastic potential energy before it springs back to its original shape.
        
        A bent diving board or a bent plastic ruler has elastic potential energy before it springs back to its original shape.
        
        The more the elastic object is compressed or stretched, the greater the amount of elastic potential energy is stored.
    - - Potential energy is the amount of energy something has stored inside it.
      - Therefore, it is also referred to as stored energy.
      - Potential energy is the energy stored in an object due to its position or its condition.
      - For example
      - When we raise a ball to a height (position), it has potential energy.
      - When we turn the key of a toy box (condition), it has potential energy.
      - There are three types of potential energy.
      - ~ Elastic potential energy
      - ~ Chemical potential energy
      - ~ Gravitational potential energy