Term Definition
Atoms Smallest unit of matter
Matter Anything that has mass and volume.
Examples of Matter Humans, smoke, textbook, water, ladybug
Non-matter Energy- light and sound
Mass How much matter is in something
Weight The pull of gravity on an object
Moon Weight decreases due to less gravity
Element Contains only one type of atom
Molecule Two or more atoms are chemically combined
Separate Compounds Break bonds between atoms
Movement All atoms and molecules move
Solid Atoms vibrate
Liquid Atoms slide
Gas Atoms move freely
Pure Only has one type of component
Volume Formula Length x width x height
Density Label g/cm3




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