Matter
	Forms, Nature of, Properties: -Objects are made of one or more materials (K-4) -Objects have many observable properties including size, weight, shape, color, and ability to react with other substances. (K-4) -Properties can be measured using tools such as rulers, balances and thermometers -Objects can be sorted by their properties (K-4) -Materials can exist in different states; solid, liquid and gas. (K-4) -Substances have characteristic properties such as density, boiling point and solubility. (5-8) -Mixtures of substances can be separated. (5-8) -Substances react chemically in characteristic ways to for new substances (5-8) -Compounds have properties that are different than the substances that made them (5-8) -Substances can be placed in groups if they react in similar ways (5-8) -Chemical elements do not break down in the laboratory (5-8) -There are 100 known elements that can form compounds. (5-8) -Compounds combine to for living and non-living things. (5-8) -The atom's nucleus is composed of protons and neutrons. (9-12) -Radioactive isotopes are unstable and undergo spontaneous nuclear reactions. (9-12) -Atoms interact with one another by transferring or sharing electrons. (9-12) -Electrons govern chemical properties. (9-12) -An element is a single type of atom (9-12) -The Periodic Chart is a consequence of the repeating pattern of outermost electrons (9-12) -Solids, liquids and gases differ in the distance and angles between molecules or atoms (9-12) -Carbon atoms can bond to one another in chains, rings and branching. Large molecules are essential to life. (9-12) -Chemical reactions can release or consume energy. (9-12) -Light can initiate many chemical reactions such as photosynthesis. (9-12)