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Unit 6 Energy&Heat

7th Grade Science

energy transformation takes place when energy changes from one form into another form.
law of conservation of energy states that energy cannot be created or destroyed. It can only change forms
efficiency it is the ratio of "output energy" to "input energy"
mechanical energy the sum of an object's kinetic and potential energy. It involves movement.
sound energy energy caused by the vibration of particles in the form of sound.
electromagnetic energy EM energy that does NOT require a medium. It travels in the form of waves. X Rays, visible light are examples.
chemical energy the energy stored in chemical bonds that hold chemical compounds. Digestion is a great example of this.
thermal energy and heat the energy of an object due to the motion of its particles. Rubbing your hands together generates heat and thermal energy.
nuclear energy splitting an Atom into multiple parts or two small atom joining together creates this type of energy.
joules it is the unit of measure for energy
kinetic theory of matter states that all of the particles that make up matter are constantly in motion
temperature the measure of the "average" kinetic energy of the particles in an object.
degree equally spaced units between two point to measure temperature.
thermometer an instrument to measure temperature
Celsius Scale temperature scale most commonly used around the world and used by scientists. Water freezes at 0 degrees.
Fahrenheit Scale temperature scale most commonly used in the United States for measuring temperature. Developed by Gabriel Fahrenheit. Water freezes at 32 degrees
Kelvin Scale a temperature scale used commonly by physicists. Water freezes at 273 Kelvin
thermal energy is the "total" kinetic energy of all particles in a substance.
heat is the energy transferred from an object of a higher temperature to a lower temperature
calorie is the measure of energy. It is equal to the amount of energy needed to raise the temperature of 1 gram of water by 1 degree
conduction is the transfer of energy as heat from one substance to another through "direct" contact.
conductor materials that transfer heat very well. Metals for example are great conductors
insulator is a material that is a poor conductor of heat. Wood, paper, and plastic foam are examples.
convection is the transfer of energy as heat by the movement of a liquid or gas. Boiling water in a pot is a great example
radiation is the transfer of energy by EM waves. Microwaves, visible light and infrared light are examples of this.
convection currents these are currents witnessed in boiling liquids. They are circular in motion
Created by: PeaceScience