PS1+(7-8)+-+2


 * [[image:PS1_p02.jpg width="800" height="84"]]

Students demonstrate an understanding of characteristic properties of matter by …**

__2a identifying an unknown substance given its characteristic properties.__

2b classifying and comparing substances using characteristic properties (e.g., solid, liquid, gas; __metal, non-metal__).

What do these GSEs mean? What subtopics do students need to address to understand these GSEs?
Subtopics may include:
 * Properties
 * Characteristic properties
 * Color
 * Density
 * Solubility
 * Melting Point
 * Boiling Point
 * Substances vs Mixtures
 * Using properties to distinguish between substances
 * Substances
 * Macro: Compounds, Elements and Mixtures
 * Micro: Atoms and Molecules

What ideas to students need to understand before they can address the topics described above?

 * Mass, volume, temperature,

What phenomena and representations help students understand these topics?
Students should have opportunities to
 * measure and compare compare characteristic properties of visually similar substances.
 * use results from a variety of tests to argue for the similarity or differences between two substances.
 * identify substances that make up every materials
 * e.g. [|How it's Made], [|What's Inside? from Wired Science]