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45 terms

5th grade Physical Science Vocabulary

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condensation
the process by which a gas changes into a liquid.
electric circuit
the path along which electrons (electricity) flow.
energy
causes changes in matter.
evaporation
the process by which a liquid changed into a gas.
force
a push or pull on an object
gas
matter with no definite shape or volume.
gravity
a force that pulls all objects in the universe toward one another.
liquid
matter that has a definite volume but takes the shape of its container.
mass
the amount of matter in an object.
matter
anything that has mass and takes up space.
mixture
a combination of two or more different kinds of matter, each of which keeps its own physical properties.
pitch
how high or low a sound is
precipitation
any form of water that falls from clouds, such as rain or snow.
radiant energy
energy that moves in waves.
reflection
the bouncing of light off objects.
refraction
the bending of light rays when they pass from one substance into a different substance.
solid
matter that has a definite shape and volume.
solution
a mixture in which particles of the two substances are evenly mixed and cannot be easily separated.
sound
the movement of energy caused by vibrations.
thermal energy
heat energy
vibration
rapis back and forth movement of matter that produces sound.
volume
the loudness of sound.
weight
the measure of the force of gravity on an object.
friction
a force that oposses or acts against motion when two surfaces rub against each other.
magnetism
when magnetic substances are sttracted to magnets.
physical state
form the matter can take (solid, liquid, or gas)
melting point
the temperature at which a substance changes from a solid to a liquid.
boiling point
the temperature at which the substance changes from a liquid to a gas.
conductor
a material that allows energy or electricity to pass through it easily.
insulator
a material that does not allow energy or electricity to pass through it easily.
freezing point
the temperature ar which the substance changes from a liquid to a solid.
potential energy
the energy an object stores because of its position.
kinetic energy
the energy of moving objects.
light energy
a form of energy that you can see, travels in a straight line, and can move through empty space where there is no air.
heat energy
the energy of moving particles in a substance (also called thermal energy)
electrical energy
energy that is produced when electrons move from one place to another.
solar energy
energy that comes from the sun.
geothermal energy
heat energy that comes from the Earth.
sound energy
energy caused by the vibration of objects.
transparent
allows light to pass through so the image is clearly viewed.
translucent
allows some light to pass through so that the image viewed in not clear.
opaque
lets no light pass through so no image is viewed.
convex lens
a lens that is thicker in the middle than at the edges and causes light rays to spread apart.
concave lens
a lens that is thicker at the edges than in the middle and causes light rays to come together.
echo
the bouncing of sound off objects.