Bell Ringer- 20 Grab a tray from lab table 2 (1 per group) Write down as many properties as you can about your substance just by visual observation.

Write down as many properties as you can about the sample 1 person from your group may get up at a time to go take a measurement. You must rotate who is doing the measuring. Goal: Team with the most scientific observations

2 Types of Properties Sort your properties into physical properties and chemical properties How might we define physical properties? How might we define chemical properties?

Header PG 20: I can describe a physical and chemical property Homework: Test corrections

Properties Chemical Properties: the ability or inability of a substance to combine with or change into one or more other substances Physical Properties: characteristic of matter that can be observed or measure without changing the sample’s composition

Bell Ringer Have your Notecards out Notebooks open to pg 20

Review it Pure Sub., 2 Elements Pure Sub, Element + Compound Solution, Elements+ Compound Suspension, Element+Compound

Review it Pure Sub., 2 Compounds Pure Sub, 2 Elements Solution, 2 Compound Suspension, 2 Compounds

Chemical vs. Physical Properties In your groups sort each of the following into chemical or physical properties Density Luster Mass Ability to burn Color Volume Crystalline Structure Length Conductivity Ability to react with water Malleability Made of _____ element Ability to decompose

Physical property: property that is displayed without any change in composition. Chemical property: Any characteristic that gives a sample of matter the ability/inability to undergo a change that alters its composition.

Chemical vs. Physical Properties Density Luster Mass Ability to burn Color Volume Crystalline Structure Length Conductivity Ability to react with water Malleability Made of _____ element Ability to decompose

Physical Properties Extensive property is a property that describes the amount of matter in a sample Changes when the size of the sample changes Intensive property is a property that is independent of the sample size. Doesn’t change when size of sample changes

Intensive vs. Extensive Properties Density Luster Mass Ability to burn Color Volume Crystalline Structure Length Conductivity Ability to react with water Malleability Made of _____ element Ability to decompose

Intensive vs. Extensive Properties Density Luster Mass Ability to burn Color Volume Crystalline Structure Length Conductivity Ability to react with water Malleability Made of _____ element Ability to decompose

Physical Change- used to separate mixtures, changes only affecting the form not composition Chemical Change- used to separate compounds, forms a new substance through a chemical reaction that is not reversible

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