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ch 9 terms jp and jd
| Question | Answer |
|---|---|
| Energy | ability to do work |
| Potential Energy | energy an object has because of its position or shape |
| Kinetic Energy | energy of motion |
| Relationship between kinetic and potential energy | when you add them together you get Mechanical energy |
| Kinetic energy formula | mv2/2 |
| Potential energy formula | weight x height |
| Mechanical energy | total energy of motion and position of an object |
| Mechanical energy formula | potential energy + kinetic energy |
| Law of conservation of energy | energy can’t be created or destroyed |
| Thermal energy | kinetic energy, particles are always in motion, energy because the way the particles are arranged, the higher the temperature the faster the particles |
| Chemical energy | form of potential energy, some molecules that have many atoms bonded together have a lot of chemical energy |
| Electrical energy | the energy of moving electrons, can be considered as potential energy or kinetic energy |
| Sound energy | caused by objects vibrations, form of potential and kinetic energy, you must move the position of something to get this energy |
| Light energy | produced by vibrations of electrically charged particles, light vibrations cause energy to be transmitted |
| Nuclear energy | this energy is associated with changes in the nucleus of an atom, energy is produced in 2 ways, when two or more nuclei join together or when the nucleus of the atom splits apart |
| Types of energy resources | they can’t be replaced only after millions of years |
| Coal | used for electric power, heating, making steel, industrial uses, and coal exports |
| Petroleum | supplies us with gasoline, kerosene, and wax and also petrochemicals, used to make synthetic fibers |
| Natural gas | it’s used in heating systems, cleanest burning fossil fuel |
| Renewable energy | can be used and replaced in nature over a relatively short time |
| Solar energy | sunlight can be converted into electrical energy through solar cells |
| Hydroelectric energy | potential energy of water is converted into kinetic energy as the water flows downhill through a dam |
| Wind energy | kinetic energy from the wind can be converted to electrical energy |
| Geothermal energy | energy resulting from the heating of earth’s crust |
| Biomass | organic matter such as plants can be burned to release energy |