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9 Cards in this Set
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The way a substance reacts with others to form new substances with different properties.
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What is chemical property?
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elements having less or more reactivity
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The ability of a substance to combine chemically with another substance.
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What is reactivity?
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example: flammability when in presence of oxygen
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A characteristic of a substance that can be observed or measured without changing the composition of the substance
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What is a physical property?
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some can be observed like shape, color, odor, and texture with the senses while others can be measured (ex. abiity to conduct heat, magnetism, or electricity)
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The temperature at which a solid becomes a liquid.
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What is the melting point?
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It is constant in a pure substance regardless of mass or volume
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The temperature at which a liquid becomes a gas below the surface.
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What is the boiling point?
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true for all pure substances regardless of mass or volume
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The mass per unit volume of a substance.
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What is density?
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light vs. heavy; float vs. sink
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The force with which a more dense fluid pushes a less dense substance upward.
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What is buoyancy?
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ice floating on water; cream rising to the top of milk
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A change that occurs when a substance changes composition by forming one or more new substances.
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What is a chemical change?
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changes such as burning gasoline in an engine to release energy
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A change in the physical form or properties of a substance that occurs without a change in composition.
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What is a physical change?
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does not affect all properties due to not changing composition
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