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Matter
Anything that has mass and takes up space
Elements
Pure substances that cannot be broken down into simpler substances.
Compounds
Substances made from two or more different elements chemically combined.
Mixture
Physical combinations of two or more different elements chemically combined
Homogeneous Mixture
A mixture that is uniform throughout
Heterogeneous Mixture
A mixture that is not uniform throughout and has visibly different parts (example: Salad, Sand)
Physical Properties
Characteristics of a substance that can be obsereved without changing the substance identity observed
Chemical properties
Characteristics that describe how a substance reacts with other substances
Example of physical properties
Color, Shape, Size, density.
Example of chemcial properties
Flammablity, reactvitiy with acid
Physical changes
Changes in the appearance or state of matter that do not alter the substances identity
Chemical Changes
Changes that result in the formation of a new substance
Example of physical changes
melting, freezing, tearing paper
Example of chemical changes
Burning paper, rusting of iron
