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