Bellringer Use a Venn diagram to compare solids

Bellringer • Use a Venn diagram to compare solids, liquids, and gases, based on shape, volume, and whether or not they are easily compressed (or forced into a smaller space). Solid Liquid Gas • http: //phet. colorado. edu/en/simulation/sta tes-of-matter

Properties of Matter Objectives: 1. 1 Distinguishing between intensive and extensive properties of matter Other AOD C. 8. 3 Compare chemical and physical properties of matter.

Demos 1. Water + alcohol 2. Marbles + water • Can anything else be added to the marbles and water? • Relationship to solids, liquids, and gases?

Gas and Vapor • “Gas” applies to substance that is naturally in the gaseous state at room temperature. • “Vapor” is the correct term for the gaseous state of a substance found in the solid or liquid state at room temperature. • What is steam?

“Matter” and “Substance” • Define “matter”. • Def. : anything that has mass and takes up space. • Def. of substance: matter that has a uniform and unchanging composition. • In my words: Substance is matter that has a chemical formula (i. e. , H 2 O or Na. Cl) • What about pool water or ocean water? ? ?

Physical Properties • Def. : a characteristic that can be measured or observed without changing the sample’s composition • Name some physical properties of a pencil. • Name some physical properties of a rose. • May include density, color, odor, taste, hardness, conductivity, malleability, shape, mass, length, volume, melting point, boiling point, state of matter at room temperature.

Extensive vs. Intensive Properties • Extensive properties are dependent upon the amount of substance present. • Intensive properties are NOT dependent upon the amount of substance present. • Use the list of physical properties from the previous slide, and classify each property as either extensive or intensive.

Chemical Properties • Def. : the ability (or inability) of a substance to combine with or change into one or more other substances – What happens to iron when exposed to air? – Iron exposed to nitrogen? • P. 57: Look at Figure 3. 3. What physical and chemical properties of copper are evident in these photos?

Assessment • Section Review (p. 60): 1, 2, 5