Matter Unit

Matter

has mass, takes up space

Chemistry

properties of matter and how matter changes

Substances

Single kind of matter (pure), has specific properties

physical properties

any characteristic of substance that can be observed without changing the composition of the substance.

chemical properties

produce a change in the composition of matter

Element

pure substance that cannot be broken down into any other substance by chemical or physical change

chemical bond

force holds two atoms together

molecules

partied made of 2+ atoms bonded togetherm

ixture

2+ substances that are mixed together but not chemically combined

homogenous mixture

mixture in which substances are distributed

Weight

measure of the force of gravity on an object

mass

measure of how much matte is in an object

volume

amount of space that matter occupiesd

density

relates to a mass of material in a given volume

endothermic change

change in which energy is taken in

exothermic change

change in which energy is given off

combustion

chemical change that releases energy in form heat and light

physical change

change in substance that doesn’t change it’s identity.

chemical change

change in which 1+ substance combine or break apart to form new substances

energy

ability to do work or cause change

tempurature

a measure of the average energy of motion of particles of a substance

thermal energy

total energy of all particles in an object

kinetic energy

matter in motion

potential energy

energy an object has because of its position

chemical energy

internal energy stored in the chemical bonds between atom is formed of

electromagnetic energy

travels through space as waves

electrical energy

electrically charged particles moving from one place to another, electrons move from one atom to another in many chemical changes