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Terms and definitions

Everything in this flashcard set.

Heat
Energy that makes things warm
Light
What lets us see; the opposite of dark
Energy
The power to do work or make things move
Kinetic
Relating to the motion of material bodies and the forces associated therewith
Potential
The difference in electrical charge between two points in a circuit expressed in volts
Chemical
Substance used in or made by chemistry
Atomic
Of or relating to or comprising atoms
Atom
The smallest component of an element having the chemical properties of the element
Molecule
The simplest structural unit of an element or compound
Photon
A quantum of electromagnetic radiation
Radiation
Energy that travels in waves or particles
Electron
An elementary particle with negative charge
Proton
A stable particle with positive charge equal to the negative charge of an electron
Neutron
An elementary particle with 0 charge and mass about equal to a proton
Density
How tightly packed the matter in something is
Mass
How much matter something contains
Gravity
Force that pulls objects toward the Earth
Weight
The vertical force exerted by a mass as a result of gravity
Vacuum
The absence of matter
Nucleus
Center of an atom or a cell
Positive
Hopeful and optimistic; the opposite of negative
Negative
A piece of photographic film showing an image with light and shade or colors reversed
Force
A push or a pull
Velocity
Distance travelled per unit time

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