absorb

To take in

circuit

a complete path of conductors that an electric current can flow through

closed circuit

a complete path of conductors that an electric current can flow through

conduct

to direct the course of; manage or control

conductor

A material that allows heat energy or electricity to pass through it easily

energy source

Materials in the environment that people can use as sources of energy

insulator

A material that does not let heat energy or electricity pass through it easily

opaque

Describes matter that light does not pass through

open circuit

A circuit where the path of electricity is interrupted

parallel circuit

An electric circuit in which each device has its own separate loop

path

a route, course, or track along which something moves

reflect

to give back or show an image

resistance

Slowing of the electric current but not stopping it

series circuit

An electric circuit in which the devices are connected in one continuous loop

switch

A device that opens and closes an electric circuit to stop and start the flow of electrons

symmetry

having matching parts around a point or on both sides of a line through the middle

translucent

Describes matter that allows some, but not all, of the light that hits it to pass through, and that scatters some light

transparent

Describes matter that allows light to pass through it easily

buoyancy

the upward push of a liquid or gas on an object

conduction

the movement of heat between objects that touch each other

density

A measurement of how much matter is packed into a certain volume of a substance

dissolve

To form a solution with another substance

evaporation

The process of changing from a liquid to a gas

flow

to move or run smoothly with unbroken continuity, as in the manner characteristic of a fluid; to move with a continual shifting of the component particles

freezing point

The temperature at which a substance changes from a liquid to a solid

gas

A state of matter in which the substance takes both the shape and the volume of its container

liquid

A state of matter in which the substance has a definite volume but takes the shape of its container

mass

A measure of the amount of matter in a solid, liquid, or gas

matter

The material, or "stuff", that everything is made of

melting point

The temperature at which a substance changes from a solid to a liquid

meniscus

Curved surface of a liquid such as water where it meets the sides of its container

mixture

a combination of two or more substances that do not form a new substance

plasma

The fourth state of matter like a gas but consisting of charged particles, ions and electrons, and found mostly in stars

property

A characteristic of a substance

reduction

to bring down to a smaller extent, size, amount, number, etc.:

solid

A state of matter in which the substance has a definite shape and a definite volume

states of matter

A form that matter can take- solid, liquid, or gas

volume

A quantity that describes an amount of space