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Energy and Power
1-22
22
Science
7th Grade
11/23/2008

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Cards

Term
energy
Definition
the ability to do work and cause change
Term
kinetic energy
Definition
the energy of motion
Term
potential energy
Definition
energy that is stored and held in readiness
Term
elastic potential energy
Definition
the potential energy that can be associated with objects that can be stretched or compressed
Term
gravitational potential energy
Definition
potential energy that depends on height
Term
radiant energy
Definition
energy that travels in waves
Term
energy conversion
Definition
a change from one form of energy to another
Term
law of conservation of energy
Definition
when one form of energy is converted to another, no energy is destroyed in the process;ENERGY CANNOT BE CREATED OR DESTROYED
Term
photosynthesis
Definition
the process through which plants make food
Term
pigments
Definition
chemical compounds in plants that absorb different colors of light
Term
chlorophyll
Definition
the most abundant pigment in plants
Term
chloroplasts
Definition
microscopic plant structures where chlorophyll is found
Term
respiration
Definition
when a plant breaks down glucose, chemical energy is released; during respiration, the chemical energy stored in glucose is converted into other forms of energy such as mechanical or thermal
Term
fuel
Definition
a material that releases energy when it burns (combustion)
Term
fossil fuels
Definition
energy-rich substances formed from the remains of organisms
Term
power
Definition
the rate at which work is done or the amount of work done in a unit of time
Term
mechanical energy
Definition
associated with motion or position of an object: school bus moving, frog leaping, sound
Term
thermal energy
Definition
measure of energy of the particles of an object: ice cream melting
Term
chemical energy
Definition
potential energy stored in chemical bonds that hold chemical compounds together: food you eat, your cells, a match
Term
electrical energy
Definition
moving electric charges produce energy: shock from static, batteries, power lines
Term
electromagnetic energy
Definition
light you see each day: visible light, UV light, microwaves, infrared radiation
Term
nuclear energy
Definition
energy stored in the nucleus of an atom: fission and fusion
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