PS1+(7-8)+-+5


 * Students demonstrate an understanding of the structure of matter by …**

__5a using models or diagrams to show the difference between atoms and molecules.

5b classifying common elements and compounds using symbols and simple chemical formulas.

5c interpreting the symbols and formulas of simple chemical equations.

5d using symbols and chemical formulas to show simple chemical rearrangements that produce new substances (chemical change).

5e explaining that when substances undergo physical changes, the appearance may change but the chemical makeup and chemical properties do not.

5f explaining that when substances undergo chemical changes to form new substances, the properties of the new combinations may be very different from those of the old.__

What phenomena and representations help students understand these topics?
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