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December 10, 2014 12/10/14 Bellringer: What is ENERGY? List some different kinds of energy (7) Types of Energy Potential Energy Kinetic Energy December 10, 2014 Potential Energy Gravitational Potential Energy: energy due to an objects height above the ground Elastic Potential Energy: energy from the ability to be "stretched" Chemical Potential Energy: energy due to the bonding of chemicals Key Points: Potential Energy 1. The more mass an object has, the greater the potential energy. 2. The higher the object is above the ground, the greater the potential energy. December 10, 2014 Which has the greatest potential energy? Figure A Figure B Which has the greatest potential energy? Figure A Figure B December 10, 2014 Kinetic Energy: Energy of motion Forms of Kinetic Energy: - Chemical - Electrical - Radiant (Light) - Mechanical - Nuclear - Thermal (Heat) - Sound Chemical Energy: Energy stored in the bonds between atoms in molecules Examples: batteries, food, chemicals, fuels, photosynthesis December 10, 2014 Electrical Energy: Energy carried by moving electrons forced along a path Examples: Electricity, lightning Radiant Energy: Electromagnetic energy that travels in waves. Examples: visible light, infrared radiation, microwaves, radio waves, gamma rays, ultraviolet radiation December 10, 2014 Mechanical Energy: Energy of motion (involves both potential and kinetic energy) Examples: throwing a ball, moving a pencil to write on a paper, using a hammer Nuclear Energy: Occurs when the nuclei of uranium atoms are changed. December 10, 2014 Thermal Energy: Is the energy a substance or system has related to its temperature (the energy of moving or vibrating molecules) Examples: Heat for our homes, heat to cook food Sound Energy: Relates to the repetitive compression and rarefraction of molecules in a substance Examples: music