Sun Source of almost all the energy is the… Wood, coal, petroleum and natural gas come from the sun. The USA gets 90% of its energy from fossil fuel.

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Presentation transcript:

Sun Source of almost all the energy is the… Wood, coal, petroleum and natural gas come from the sun. The USA gets 90% of its energy from fossil fuel.

 Can take the shape of many different forms.  Two Categories: Kinetic or Potential  Kinetic Energy is energy of motion– of waves, electrons, atoms, molecules, substances and objects  Potential Energy is stored energy and the energy of position– gravitational energy. There are several forms of potential energy Energy is the ability to do work

 stored energy  Burning is a chemical change  Our bodies use food and give off energy in the form of body heat.  An adult radiates heat energy equal to 100 W light bulb.  All the energy that is transferred through living organisms. Types of Potential Energy

 Stored in objects by tension  Compressed springs and stretched rubber bands are examples of stored mechanical energy.  Sometimes known as elastic energy. Mechanical Energy (potential)

 - stored in an atom’s nucleus  Fusion- the combining of nuclei  Ex. The sun or any star  Fission- the splitting of a nucleus  Like in the bombs or nuclear reactors Nuclear Energy (potential)

 Energy stored in an object’s height.  The higher and heavier the object, the more gravitational energy is stored.  When you ride a bicycle down a steep hill and pick up speed, gravitational energy is being converted to motion energy. Gravitational Energy (Potential)

 - electromagnetic light waves Light Energy (Radiant)

 how fast matter is moving  movement of thermal energy is heat  Measured by temperature  Temperature is a measure of how much thermal energy (or heat) is in matter Thermal Energy

Motion Energy  energy stored in the movement of objects.  The faster they move, the more energy is stored.  It takes energy to get an object moving, and energy is released when an object slows down.  Wind is an example of motion energy. Types of Kinetic Energy

 - vibrational energy  The loudness depends on how much energy the sound wave has. Sound Energy

 Static electricity- is a build up of electrons  Current electricity is the movement or flow of electrons Electric Energy

 Energy cannot be created or destroyed. It is transformed or transferred.  Energy can be changed (or transferred) from one form into another.  The Law of Conservation of Energy states...

Chemical potential Mechanical potential Gravitational potential Click on the words below to choose the type of energy found in the picture.

Chemical potential Mechanical potential Gravitational potential

Chemical potential Mechanical potential Gravitational potential

Chemical potential Mechanical potential Gravitational potential

Chemical potential Mechanical potential Gravitational potential

Energy Transformations from Potential to Kinetic

Energy inEnergy out Chemical Motion Click on the arrows to show the type energy transformation occurring in the pictures.

Energy inEnergy out Electrical Light

Energy inEnergy out Gravitational potential Motion

Energy inEnergy out Electrical Thermal

Energy inEnergy out LightElectrical

Energy inEnergy out Mechanical potentialMotion

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