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Classification of Matter

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Presentation on theme: "Classification of Matter"— Presentation transcript:

1 Classification of Matter
Chapter 15

2 Composition of Matter – Sec. 1
Pure Substances Same composition throughout Either an element or compound Element All one type of atom Everything made of atoms Compound Atoms of two or more elements chemically bonded together

3 Composition of Matter Mixtures Heterogeneous Mixture
Made of two or more substances that can be easily separated by physical means Heterogeneous Mixture Different materials can be seen easily Granite, concrete, vegetable soup Homogeneous Mixture (Solution) Blended evenly throughout Vinegar, Kool-aid

4 Air, sugar water, stainless stell Heterogeneous Mixture
MATTER Can it be separated? yes no Mixtures Substance Homogeneous Mixture Air, sugar water, stainless stell Heterogeneous Mixture Granite, wood, blood Compounds Water, sodium chloride Elements Gold, aluminum

5 Mixtures Colloid ~ heterogeneous Detecting Colloids
Particles larger than solution but not heavy enough to settle out Milk, paint, fog and smoke Detecting Colloids Pass a beam of light through it Colloid – See beam Solution – Cannot see beam Particles big enough to scatter light – Tyndall Effect

6 Mixtures Suspension ~ heterogeneous Not solution, not colloid
Muddy pond water Heterogeneous mixture with a liquid and visible particles that settle

7 Properties of Matter Section 2

8 Physical Properties Def: characteristic observed without changing the identity of the material Ex: color, shape, size, density Appearance Behavior Magnetic, malleable, flow of liquid

9 Separating Mixtures Sand and Rock mixture?
Filter or sift Iron filings and Aluminum mixture? Magnet

10 Physical Change Change in size, shape or state of matter and identity is same Solid to a liquid? Yes

11 Condense Freeze Melt Evaporate Solid Liquid Gas

12 Physical Change How to get pure water from salt water?
Distillation – evaporate liquid and then recondense it

13 Chemical Properties and Changes
Chemical Property – can be observed only by changing the substance Flammability, reactivity, decomposition Chemical Change – change where a NEW substance is formed Weathering – Physical or Chemical Change? Both!

14 Law of Conservation of Mass
Matter is neither created nor destroyed during a chemical reaction Mass of all substances before = mass of all substances after change

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