Changes in Matter Physical Change is any change that alters the form or appearance of matter but does NOT make any substance in the matter into a different.

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Presentation transcript:

Changes in Matter Physical Change is any change that alters the form or appearance of matter but does NOT make any substance in the matter into a different substance.

Physical Changes Changes in State Changes in form: Solid, liquid, gas Dissolving Bending Crushing Breaking Chopping Filtration Distillation

Chemical Changes Chemical change- produces one or more new substances with different properties. Evidence of chemical changes New substance with different properties Burning/cooking Gas is produced (odor) Precipitate Endo/Exothermic reaction Light is produced

Chemical Changes Examples Combustion (burning) Electrolysis (electricity breaks a compound into its elements) Oxidation (slow combination of a substance with oxygen) FeO2 Tarnishing (combination of sulfur with a metal)

The Law of Conservation of Mass No matter is created or destroyed during a chemical or physical change. No mass is lost, because during a chemical change, atoms are not lost or gained, only rearranged.

Matter and Thermal Energy Every chemical or physical change in matter includes a change in energy. Temperature- measures the average random motion of the particles in a substance.

Matter and Thermal Energy Thermal energy is the total energy of the particles in an object.

Thermal Energy and Changes in Matter Endothermic change- a change in which energy is taken in. Exothermic change- a change in which energy is given off.