General
the ability to cause changes in matter
What is energy
Sound energy needs ___________in order to travel
What is matter?
the light energy that bounces off objects
What is a reflection?
the transfer of heat as a result of the mixing of a liquid of a gas
What is convection
the energy in motion or the energy in use
What is kinetic energy
the energy an object has because of where it is or because of its condition
What is potential energy
a material that resists the flow of electrons
What is an insulator?
a clear material that bends, or refracts, light ray passing through it
What is water?
the amount of space that an object takes up.
What is volume?
the charge obtained by an object when it gains or loses electrons
What is an electric charge
an element of sound determined by the speed which sound waves move
What is pitch?
A magnet made with wires and electric current.
What is an electromagnet?
a form of energy that can travel through empty space or through some kinds of matter
What is light enegy?
the average kinetic energy of all the particles in an object
What is temperature?
The attraction or repulsion between electric charges.
What is an electric force
a spinning top, a rolling bicycle, a flying airplane, and flowing water
What are examples of mechanical energy?
the transfer of thermal energy by electromagnetic waves
What is radiation?
the bending of light rays when they pass through a substance
What is refraction?
the transfer of thermal energy from one substance to another
What is heat?
The flow of electrons
What is electric current
about 340 meters per second (about 1100 ft/sec.)
What is the speed of sound?
the principal that energy can't be created or destroyed
What is the Law of Conservation of Energy
rays that start at a source such as the sun and travel in a straight line until they strike something such as earth.
What is light?
the direct transfer of heat between objects that touch
What is conduction?