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PROPERTIES OF MATTER (PART 2) (UNIT TWO, LESSON 2.2)
BY MARGIELENE D. JUDAN
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LESSON OUTLINETwo Components of MatterPhysical Properties Chemical Properties
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MATTER IS ANYTHING THAT OCCUPIES SPACE AND HAS MASS.
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TWO COMPONENTS OF MATTERCompositionProperties
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PHYSICAL PROPERTY
Without any change in compositionCan be classified as intensive and extensive.(ex. Change in phase, cutting paper, melting)
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EXAMPLES OF PHYSICAL PROPERTYDensity – amount of mass in a specified placeVolume – amount of space an object occupiesBoiling Point – temp. in which liquid changes to gas (evaporation)Melting Point – temp. in which solid changes to liquid (melting)
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EXAMPLES OF PHYSICAL PROPERTYMalleability – capability of metal to be hammered into thin sheets (ex. Gold, silver, tin, jewelries)Conductivity – ability to conduct heat and electricityMagnetic property – ability to attract materials made of iron and steelDuctility – ability to be drawn into wires (ex. Copper)Hardness – resistance to scratch (ex. Hardest is diamond)
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CHEMICAL PROPERTY
Change in composition or chemical formula(ex. Rusting, burning, change in taste)
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PHYSICAL VS CHEMICAL CHANGE
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EXAMPLES
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TAKE NOTE: ALL CHEMICAL REACTIONS ARE CHEMICAL
CHANGES!
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ACTIVITY! (1/4 SHEET OF PAPER)
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Write “P” for physical change and “C” for chemical change. (#s 1-7)
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1.
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2.
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3.
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4.
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5.
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6.
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7.
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8. Which of the following are examples of matter? You may have more than 1 answer/s.
A. A dog B. Carbon Dioxide C. Ice Cubes D. A moving car
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9. Aluminum phosphate has a density of 2.566 g/cm3.
A. Physical property B. Chemical property C. Physical change D. Chemical change
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10. Sunlight is a matter.
A. True B. False C. Cannot be determined
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ANSWERS!
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1. Rusting is a chemical change.
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2. Melting is a physical change.
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3. Freezing is a physical change.
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4. Burning is a chemical change.
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5. Cutting paper is a physical change.
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6. Rotting is a chemical change.
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7. Forming air bubbles (ex. yeast) is a chemical change.
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8. Which of the following are examples of matter? You may have more than 1 answer/s. Answer: ALL OF THE ABOVE! A. A dog B. Carbon Dioxide C. Ice Cubes D. A moving car
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9. Aluminum phosphate has a density of 2.566 g/cm3.
A. Physical property
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10. Sunlight is a matter.
B. False. Sunlight has no mass and doesn’t take up any space (volume). Sunlight is a form of energy.
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Assignment:
Answer Laboratory 1.3 at home (Take-Home Task).
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SOURCES:Science Links 7http://chemwiki.ucdavis.edu/Analytical_Chemistry/Chemical_Reactions/Properties_of_Matter