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What's the Matter?

What's the Matter? Unit 1

TermDefinition
matter Anything that has mass and takes up space
atom The smallest particle of an element
element A pure substance that cannot be broken down into any other substances; made up of only one type of atom
molecule Created when two or more atoms join together.
molecule can be made up of two or more atoms of the same element (like Hydrogen gas = 2 atoms of Hydrogen)
molecule two or more atoms of different elements joining together (like water = 2 atoms of Hydrogen and 1 atom of Oxygen)
compound two or more atoms of different elements joining together (like water = 2 atoms of Hydrogen and 1 atom of Oxygen)
expand To get larger in size, volume or quantity; when atoms gain heat energy, they move faster and spread out
particles A very small piece of a part, a tiny portion or speck
thermal energy Heat energy; the motion of molecules in a substance
vibrate A rapid, back and forth motion
solid Particles are closely packed together and vibrate in place; has definite shape and volume
liquid Particles touch each other and are packed loosely together; has definite volume but NOT definite shape – take the shape of container
gas has NO definite volume or shape – take the shape of container when closed; spread out indefinitely when container is not closed; low density
density how much mass is present per given volume
density mass/volume
solution groups of molecules that are mixed up in even distributions
solute a substance(usually a solid) that is dissolved into another substance
solvent a substance(usually a liquid) that does the dissolving in a solution
solubility The ability of one substance to dissolve in another substance
Created by: mpmsscience
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