the ability to cause changes in matter

a push or pull that causes an object to move, stop, or change direction (ex: when force is applied to a guitar string the resulting vibration produces sound

the light energy that bounces off objects

the bending of light rays when they pass through a substance

the movement of thermal energy from one place to another

a smooth steady movement of liquid, gas, or electricity

the flow of electrical power through a circuit

the energy of sunlight; it powers the water cycle

energy caused by a vibrating object

properties that can be observed, measured, or changed

the force of attraction or repulsion some materials have on other materials

a material that allows energy to pass through it

a material that blocks energy from moving through

a system with many parts

a complete pathway of conductors that allows electricity to flow through it

a combination of 2 or more substances that do not chemically change

a liquid mixture in which the particles of each substance are evenly mixed- like sugar dissolving into water

anything that has mass and takes up space

the amount of matter in something

the concentration of matter in an object; tightly or loosely packed