Unit 1 – Flashcards
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Eugene describes the physical property of a material as "sweet and floral." What physical property of the material is Eugene most likely observing?
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odor
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When liquid gold becomes a solid, its particles get closer together. Which best describes what happened to the gold?
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the rearrangement of particles in a physical change
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What is an example of a physical change?
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ice forming and then melting back into water
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Which statement about the physical change of liquid water boiling into steam is true?
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The heat added represents an energy change.
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Which can occur in a physical change?
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The particles can arrange in different ways
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_______ is the property of matter in which a substance can transfer heat or electricity.
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Conductivity
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Fifteen grams of a liquid plastic are frozen in a physical change that increases the volume. What can be known about the plastic after the change?
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It will still weigh 15 grams.
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Which scenarios are examples of physical changes? Check all that apply.
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-Silicon is cut into tiny pieces for computer chips.
-Liquid water freezes to form ice.
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What happens when a substance undergoes a physical change?
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Some physical properties change, but the substance keeps its identity.
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Wax melts when it is heated. Which most likely describes what is true of the result of this reaction?
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The same amount of wax exists before and after the change
