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22 Cards in this Set
- Front
- Back
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What is the universe composed of
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Matter
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Describe 3 properties of matter
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1) Has mass 2) Occupies Space 3) Has Intertia
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List the three states of matter
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Solid, Liquid, Gas
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Describe the properties of a liquid
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Particles are mobile, but relatively close. Shape is like container. Definite volume. Flows. High or Low density. Not compressible. Expands slightly on heating.
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Describe the properties of a solid
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Close, tightly packed particles. Definite shape and volume. Does not flow. High or low density. Not compressible. Expands slightly on heating.
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Describe the properties of a gas
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Particles are independent, far apart. Shape and volume are like container. Flows. Low density. Compressible. Expands greatly on heating.
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What is the transition from solid to liquid called? Give an example.
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melting/fusion. Ex. melting of snow/ice
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What is the transition of a solid to a gas called? Give an example
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sublimation. Ex. sublimation of dry ice
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What is the transition of a liquid to a solid called? Give an example.
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freezing. Ex. Freezing of water (or a liquid metal)
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What is the transition of a liquid to a gas called? Give an example
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Vaporization. Ex. evaporation of water.
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What is the transition of a gas to a liquid called? Give an example.
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Condensation, Liquefaction. Ex. Formation of dew, liquefaction of carbon dioxide
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What is the transition of a gas to a solid called? Give an example.
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Condensation, deposition. Ex. Formation of frost and snow.
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Can all substances change state by changing temperature
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No. Some substances (like wood) undergo chemical rxns first.
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Give 4 examples of physical changes
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1) change of state 2) movement 3) breaking 4) dissolving - the molecules remain the same.
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Describe a chemical change
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New molecules produced.
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Give examples of physical properties
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color, taste, odor, solubility, luster, melting point, crystal structure, boiling point, hardness, elasticity, malleability, ductility, tensile strength, refractivity, coductivity, specific heat, density
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What is the formula for density
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D=Mass/Volume
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How is the specific gravity calculated for liquids?
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SG=Density of substance/Density of Water (Density of water = 1.00 at 3.98 C)
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How is specific gravity calculated for gases?
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SG=Density of substance/Density of air
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Describe the difference between Mass and Weight
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Mass is the amount of matter. Weight is the force pulling an object down d/t gravity. W=GH.
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How can chemical properties be observed?
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Chemical properties are observed when a substance undergoes a change in composition
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Give examples of chemical properties
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1) reactivity w/ another substance (air, acid, etc). 2) Flamibility
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