Review 17
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| Substances are either elements ______. | compounds
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| The color of a substance is a ____ property. | physical
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| Smoke is a _____. | colloid
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| ______ is a way to separate a mixture using the physical property of boiling point. | Distillation
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| The law of conservation of mass states that the mass of all substances before a ____ change equals the mass of all the substances after the change. | chemical
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| Colloids are _______. | mixtures
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| The freezing point of water is a ______ change. | physical
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| Homogeneous mixtures include only ______. | solutions
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| When lightning converts oxygen gas, O2, into ozone, O3, it is a _____ change. | chemical
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| A fruit salad is a _____ mixture. | heterogeneous
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| Flammability is a ______ property. | chemical
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| When a firecracker explodes, mass is _____. | conserved
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| If a mixture scatters light and does not settle upon standing, it is_____. | a colloid
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| A suspension is a ______ mixture. | heterogeneous
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| The breaking of a glass window is a ______ change. | physical
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| Using oxygen to separate molten copper sulfide into copper and sulfur dioxide is a ____ change. | chemical
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| You are given a flask that contains 250 mL of a clear, brown liquid. You shine a light through the liquid, and no light beam is visible. substance? Y/N? | Yes
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| You are given a flask that contains 250 mL of a clear, brown liquid.You shine a light through the liquid, and no light beam is visible. Colloid? Y/N? | No
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| You are given a flask that contains 250 mL of a clear, brown liquid.You shine a light through the liquid, and no light beam is visible. Solution of a solid in a liquid? Y/N? | Yes
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| You are given a flask that contains 250 mL of a clear, brown liquid.You shine a light through the liquid, and no light beam is visible. Suspension? Y/N? | No
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| You are given a flask that contains 250 mL of a clear, brown liquid.You shine a light through the liquid, and no light beam is visible. Solution of a liquid in a liquid? Y/N? | Yes
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| composition variable | mixture
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| has mass, takes up space | matter
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| two or more elements combined | compound
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| all atoms the same | element
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| composition definite | substance
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| Matter is classified as _______ and mixtures. | substances
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| A colloid is a _______ mixture. | heterogeneous
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| River deltas, which forms as silt and mud settle, are evidence that river water is ______. | suspension
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| A particle scatters light if it is larger than the _____ of light. | wavelength
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| When acid rain falls on limestone, _____ weathering occurs. | chemical
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| The resistance of diamond ( a form of carbon) to corrosion is a ______ property. | chemical
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| When sugar and salt are mixed together, the properties of the final substances are ________ those of the beginning substances. | identical/same
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| The law that states mass is neither gained or lost in a chemical change is ________. | law of conservation of mass
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| Explain how you could separate a mixture of sand and sugar. | add water and strain out the sand and distill the water
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| Why is saltwater a mixture, not a substance? | Can separate it physically by distillation
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| What physical property could you use to separate a solution of two liquids? | the boiling point
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| Explain how different sized particles can be removed from water. | can filter them through different sized filters
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| A burning candle is placed in a sealed container on a sensitive balance. After a while, the flame becomes smaller and then goes out. Explain how the mass of the system changed. | the gas has mass and that's why the balance changed the mass of the system didn't change
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| Iron and oxygen combine to form rust. Compare the mass of iron and oxygen before the reaction with the mass of the rust after the reaction. | 68 16 68+16
4FeIII + 3O2 ---> 2 Fe2O3
272 + 96-------> 272 + 96
368 = 368 Mass didn't change; mass is equal
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| Italian salad dressing is vinegar, oil, and spices. Is it a colloid, a solution, or a suspension after it is shaken well? | suspension
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