Energy PowerPoint By Martin

Kinetic energy  Kinetic Energy is energy that is in motion.  Moving water and wind are good examples of kinetic energy.  Kinetic energy includes electrical, radiant thermal, and sound energy.

Kinetic energy-Electrical energy  The movement of electrons in a wire  Electrical energy is the movement of charged particles, negative (-) and positive (+).  It can come from batteries or power plants and it can also be found in nature. Power plants burn fuel to make electricity which is then sent to homes and businesses through wires  An example is lightning

Kinetic energy-radiant energy  Is electromagnetic energy that travels in transverse waves.  Radiant energy includes visible light, x-rays, gamma rays and radio waves.  Light is one type of radiant energy.  Solar energy is an example of radiant energy

Kinetic energy-Thermal energy  Thermal Energy is the heat and internal energy in substances  It’s the vibration and movement of the atoms and molecules within substances.  Geothermal energy is an example of thermal energy.

Kinetic energy-sound  Sound is the movement of energy through substances in longitudinal (compression/rarefaction) waves.  Sound is produced when a force causes an object or substance to vibrate––the energy is transferred through the substance in a wave.

Potential Energy  Energy is measured in the amount of "work" it does. Potential Energy is stored energy.  Examples of potential energy are oil sitting in a barrel, or water in a lake in the mountains. This energy is referred to as potential energy, because if it were released, it would do a lot of work.

Potential Energy (cont.)  It is called potential energy because it has the potential to be converted into other forms of energy, such as kinetic energy  Energy can change from one form to another.  An example is a Roller Coaster. When it is on its way up, it is using kinetic energy since the energy is in motion. When it reaches the top it has potential (or stored) energy. When it goes down the hill it is using kinetic energy again.

Potential energy-Chemical energy  Chemical Energy is energy stored in the bonds of atoms and molecules.  It is the energy that holds these particles together.  Biomass, petroleum, natural gas, and propane are examples of stored chemical energy.

Potential energy-stored mechanical energy  Stored Mechanical Energy is energy stored in objects by the application of a force.  Compressed springs and stretched rubber bands are examples of stored mechanical energy.

Potential energy-nuclear  Nuclear Energy is energy stored in the nucleus of an atom––the energy that holds the nucleus together.  The energy can be released when the nuclei are combined or split apart. Nuclear power plants split the nuclei of uranium atoms in a process called fission.  The sun combines the nuclei of hydrogen atoms in a process called fusion. Scientists are working on creating fusion energy on earth, so that someday there might be fusion power plants.

Potential energy-gravitational  Gravitational Energy is the energy of position or place.  A rock resting at the top of a hill contains gravitational potential energy. Hydropower, such as water in a reservoir behind a dam, is an example of gravitational potential energy.

Conservation of energy  Energy in a system may take on various forms (e.g. kinetic, potential, heat, light).  The law of conservation of energy states that energy may neither be created nor destroyed. Therefore the sum of all the energies in the system is a constant

Energy Efficiency  Energy efficiency is the amount of useful energy you get from a system.