unit 3 test: physical and chemical properties and changes

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10/31/23

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10 Terms

1
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a physical property is a characteristic of a substance that can be measured or observed without changing the composition of the substance

a physical property is a characteristic of a substance that can be measured or observed without changing the composition of the substance

2
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physical properties are classified as qualitative or quantitative and intensive or extensive

physical properties are classified as qualitative or quantitative and intensive or extensive

3
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physical properties

  • state or phase of matter: solid, liquid, gas

  • viscosity

  • specific heat

  • freezing and melting point

  • length, width, height

  • surface tension

  • ph

  • magnetic

  • mass and weight

  • luster

  • color

  • shape

  • size or volume

  • temp

  • conductivity

  • solubility

  • density

  • boiling point

  • malleability and ductility

  • tensile strength

  • composition

4
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chemical properties are properties that can be observed or measured during or right after a chemical reaction. these properties describe how a substance reacts with another substance

chemical properties are properties that can be observed or measured during or right after a chemical reaction. these properties describe how a substance reacts with another substance

5
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chemical properties

  • oxidization

  • agent reducer

  • tarnishes

  • reacts with element

  • reacts with metals

  • reacts with water

  • reacts with acids

  • reacts with bleach

  • decomposes, degrades, spoils, rots

  • combustible, flammable

  • rustable

  • corrosive

6
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physical changes alter a substances physical properties but not its chemical composition. no new substances are created. generally reversible

physical changes alter a substances physical properties but not its chemical composition. no new substances are created. generally reversible

7
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physical changes

  • stretching

  • breaking

  • temp change

  • bending

  • splitting

  • crushing

  • cutting

  • dissolving

  • phase changes (solid, liquid, gas)

8
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mass before a chemical reaction is the same as the mass after the reaction

mass before a chemical reaction is the same as the mass after the reaction

9
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chemical changes

  • rusting

  • decomposing

  • digestion

  • combusting

  • corroding

  • tarnishing

  • burning

10
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evidence a chemical change has occurred

evidence a chemical change has occurred:

  • production of gas (bubbles)

  • formation of a solid

  • unexpected color change

  • emission or absorption of energy (heat, light, sound)

  • change in odor or taste