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9 Week Exam Review

Energy

TermDefinition
Kinetic energy Energy of motion
Potential energy Stored energy or energy of position
Gravitational Potential Energy The energy an object has because of its position in a gravitational field. It is higher than its original position.
Law of Conservation of Energy Energy can neither be created or destroyed it just changes form
Thermal Energy The internal energy in substances. Energy of moving or vibrating molecules within substances. Heat energy.
Chemical Energy Energy that is stored in the chemical composition of matter.
Electrical Energy Energy of moving electrons through an electric charge.
Energy transformations The change of energy from one form to another.
Radiant Energy Energy that travels by waves or particles, particularly electromagnetic radiation such as heat or x-rays.
Conduction The process by which energy is transferred from a warmer object to a cooler object by means of physical contact. (Heat through direct touch)
Convection A process by which energy is transferred in gases and liquids, occurring when a warmer, less dense area of gas or liquid is pushed up by a cooler, more dense area of the gas or liquid. (Heat through a fluid)
Radiation Energy that travels across distances in the forms of electromagnetic waves. (Heat through open space)
Thermal equilibrium When two objects are placed in contact, heat is transferred from one to the other until they reach the same temperature.
Coal A black or dark-brown combustible mineral substance consisting of carbonized vegetable matter, used as a fuel. Non-renewable, pollutes the Earth, but is cheap.
Oil A smooth, thick liquid that is used as a fuel and for making the parts of machines move smoothly. Non-renewable, pollutes the Earth, but is cheap.
Natural gas Flammable gas, consisting largely of methane and other hydrocarbons, occurring naturally underground. Non-renewable, pollutes the Earth, but is cheap.
Nuclear power The energy released during nuclear fission or fusion. Non-renewable, is cheaper than other alternatives, but can be very dangerous.
Biomass Organic matter used as a fuel, especially in a power station for the generation of electricity. Renewable but can be expensive to mine and store.
Hydropower Hydroelectric power. Renewable, abundant where there is water, but can be expensive to build.
Geothermal Thermal energy generated and stored in the Earth. Renewable, clean energy, but can cause earthquakes.
Solar Radiant energy emitted by the sun. Renewable, abundant, but can be expensive to build and store.
Sound Energy The movement of energy through objects or substances in longitudinal (compression) waves.
Mechanical Energy The movement of objects or substances from one place to another.
Conduction, Convection, or Radiation: A hot air balloon rising through the air. Convection
Conduction, Convection, or Radiation: Feeling the warmth from the heater in your car with out touching the vents. Radiation
Conduction, Convection, or Radiation: A pot being heated on a stove top. Conduction
Conduction, Convection, or Radiation: A spoon warming up in a cup of hot chocolate. Conduction
Conduction, Convection, or Radiation: The concrete heating from the sun. Radiation
Conduction, Convection, or Radiation: Water boiling causing bubbles to rise and fall. Convection
Conduction, Convection, or Radiation: A cool front coming in, pushing warm air (less dense air) up into the sky. Convection
Conduction, Convection, or Radiation: A heat lamp melting candy without touching it. Radiation
Balanced Forces Two forces acting in opposite directions on an object, and equal in size.
Unbalanced Forces A force that changes the position, speed or direction of the object to which it is applied.
Force A push or a pull.
Newton The unit of force.
Wind energy Describes the process by which wind is used to generate electricity. Renewable, abundant, but can be harmful to wildlife.
Motion An object moving or being moved.
Net Force The overall (total) forces acting on an object.
Created by: DDenney