Chapter 3: Matter—Properties and Changes Tammilee Kerr

Section 1 Properties of Matter

Substances Matter: is anything that has mass and takes up space. Matter is everything around us Examples: Rock, water, air, cup Pure Substance: Matter that does not change its composition Examples: Pure Water Example: Tap Water and sewage are not pure substances

States of Matter 4 states of matter: Solid, Liquid, Gas Solid: Definite volume and definite shape May not take the shape of a container Volume does not change

States of Matter 4 states of matter Cont’d Liquid: Flows but has definite volume and indefinite shape Particles move past each other so shape can change Volume does not change

4 states of matter Cont’d: Gas: Indefinite volume and indefinite shape Takes the shape of a container Volume Changes

Properties and Change Physical Properties: A characteristics of matter that can be observed or measured without changing the properties composition Chemical Properties: The ability of a substance to combine with or change into one or more other substances is called a chemical property

Properties and Change Physical Properties: A characteristics of matter that can be observed or measured without changing the properties composition Extensive Properties: Dependent on the amount of substance (matter) that is present Example Mass Length Volume Intensive Properties: Do not depend on the amount of matter that is present. Melting point Boiling point Ability to conduct electricity Ability to transfer heat

Properties and Change Chemical Properties: The ability of a substance to combine with or change into one or more other substances is called a chemical property Terms associated with a chemical change Decomposition Rust Color Change Change in temperature Change in smell Production of a gas Example: Iron + O2  Rust Example: Copper + O2  Color Change