Classification and Properties of Matter. Matter Classification Tree Matter Pure SubstanceMixture ElementCompound Homogeneous Heterogeneous -Gold-Water.

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Presentation transcript:

Classification and Properties of Matter

Matter Classification Tree Matter Pure SubstanceMixture ElementCompound Homogeneous Heterogeneous -Gold-Water -Air -Salad -Neon -Sugar -Gasoline -Mud

Physical Properties These include hardness, density, shape, melting/boiling point, phase (solid, liquid, gas)

How does temperature change when matter changes state?

Physical changes Physical change- may involve a change in state (ex. solid to liquid), or change in size, shape, or energy Examples of physical changes are filtering, evaporation, ripping paper, melting, dissolving **The chemical identity of the object is unchanged (ex. ripped paper is still paper)

Chemical Properties Describe how a substance transforms when it reacts with other substances Can only be seen during a chemical reaction During a chemical reaction, a substance is changed into something else; This is a chemical change Ex. Hydrogen and Oxygen combine to form water 2H 2 + O 2  2H 2 O

Chemical Changes Occur on a small scale (molecular level) Chemical change- new substance is formed; products are different from the reactants Chemical changes include: burning, dissolving w/ acid, rusting Rust: 4Fe + 3O 2  2Fe 2 O 3

Physical or Chemical? Grapes turn to wine - Chemical Water boils- Physical An egg is fried on the sidewalk- Chemical Film is developed- Chemical Wood burns- Chemical Blending fruit for a smoothie- Physical Mixing Kool-Aid and water- Physical Grass grows- Both!