the capture of light energy by a light substance, when the light is neither reflected nor refracted
100
what is convection
motion of a heated material due to gravity and differences in density; convection currents in the Earths mantle produce forces that move tectonic plates
100
what is mechanical energy
energy that can move objects through contact; the sum of potential and kinetic energies in systems
100
what is radiation
energy that is emitted in the form of waves or particles
100
Once they have reached the same temp. , about what temp. will that be?
25 degrees C
200
what is chemical energy
energy contained in the chemical bonds between substances; food and gasoline contain chemical energy
200
what is electrical energy
the flow of electrons among atoms in a substance that conducts electricity
200
what is medium
the substance through which a wave travel
200
what is reflection
the change in the direction of a wave as it bounces
200
Which of the following forms of energy requires a medium through which to travel?
Sound
300
what is a circuit
a system of electrical parts that provides a path for an electrical current
300
what is energy
the ability to generate a force that does work
300
what is a nonrenewable resource
a resource that humans use more quickly than nature can replace, such as coal, natural gas , or oil
300
what is refraction
the change of direction of a wave caused by a change in speed as it passes from one medium into another
300
A purple object absorbs all colors of light except for...
Purple
400
what is conduction
a form of heat transfer in which heat moves through a substance without the substance itself moving
400
what is heat energy
the form of energy arising from the motion of all particles in a system; heat energy moves between things that are at different temperatures; also called thermal energy
400
what is nuclear energy
energy that comes from the nucleus of an atom when it spills apart or joins together with other nuclei
400
what is renewable resource
a resource that is replaced through natural cycles, such as solar,wind, and hydroelectric
400
What sort of heat transfer has occurred?
Convection
500
what is conservation of energy
the physical law stating that energy cannot be created or destroyed
500
what is kinetic energy
energy that arises from an objects motion
500
what is potential energy
energy that results from an objects position
500
what is solar energy
energy that comes from the Sun; includes light
500
When you go outside on a sunny day, you might feel heat from the sun on your skin. What type of solar energy is this?