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5th grade Physical Science 2011
Physical Science
42
Science
5th Grade
01/12/2011

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Term
matter
Definition
anything that has mass and takes up space
Term
mass
Definition
the amount of matter an object has
Term
weight
Definition
the measure of the amount of gravity acting on an object's mass
Term
volume
Definition
the amount of space taken up by matter
Term
density
Definition
the amount of mass an object has in a known volume
Term
state
Definition
one of the three main forms of matter
Term
solid
Definition
a state of matter that has a fixed shape and volume
Term
liquid
Definition
a state of matter that has a fixed volume, but its shape changes to match the shape of its container
Term
gas
Definition
a state of matter that does not have a fixed shape or volume
Term
physical change
Definition
a change in the appearance of matter without actually changing the matter itself
Term
physical property
Definition
a characteristic of matter that can be observed or measured and can be changed without changing the matter itself
Term
property
Definition
a characteristic used to describe matter
Term
texture
Definition
how a substance feels or looks
Term
odor
Definition
how a substance smells
Term
conductor
Definition
a substance that allows electricity to easily travel through it
Term
insulator
Definition
a substance that does not let electricity pass through easily
Term
magnetic
Definition
a description of substances attracted to magnetic force
Term
boiling point
Definition
the temperature at which a substance changes from a liquid to a gas
Term
melting point
Definition
the temperature at which a substance changes from a solid to a liquid
Term
mixture
Definition
a combination of two or more substances that do not join together to form a new substance.
Term
solution
Definition
a mixture in which the substances are spread out evenly between one another and cannot be told apart
Term
dissolve
Definition
to form a solution with another substance
Term
invisible
Definition
cannot be seen
Term
force
Definition
a push or a pull
Term
motion
Definition
movement
Term
friction
Definition
a force that works against motion
Term
gravity
Definition
the force that pulls objects toward one another
Term
inertia
Definition
the tendency of an object to resist a change in motion
Term
light
Definition
a form of energy that travels in waves and can move through empty space
Term
reflection
Definition
the bouncing back of light waves off of a surface
Term
refraction
Definition
the bending of light waves as they travel from one surface to another
Term
convex lens
Definition
a lens that is thicker in the center and thinner at the edges, a shape that bends light inward
Term
concave lens
Definition
a lens that is thinner in the center and thicker at the edges, a shape that bends light outward
Term
sound
Definition
a form of energy produced by vibrating objects
Term
vibrate
Definition
move back and forth rapidly
Term
energy
Definition
the ability to do work
Term
solar energy
Definition
energy from the sun
Term
kinetic energy
Definition
the energy of motion
Term
potential energy
Definition
energy that is stored in an object
Term
electricity
Definition
a form of energy produced inside particles of matter
Term
current
Definition
the movement (flow) of electricity in a certain path
Term
source of energy
Definition
where the energy comes from
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