Chemical Reactions

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What is a chemical change?

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A process where substances transform into different substances with new chemical properties, such as spoiling food.

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What is a physical change?

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A change that affects one or more physical properties of a substance without altering its chemical composition, such as melting ice.

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What is nylon made from?

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Nylon is a synthetic polymer made from petroleum.

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What indicates a chemical reaction has occurred?

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A change in the product, such as the formation of gas, color change, or temperature change.

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What is a renewable resource?

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An energy resource that is replaceable by natural means, such as solar or wind energy.

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What do coefficients in a chemical equation represent?

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The number of molecules of each reactant used and the number of molecules of each product made.

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What is the difference between reactants and products in a chemical reaction?

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Reactants are the starting substances that undergo change, while products are the substances formed as a result of the reaction.

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What is an example of a chemical change?

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Rusting of iron, where iron reacts with oxygen to form iron oxide.

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What is an example of a physical change?

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Dissolving sugar in water, where the sugar retains its chemical identity.

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What is combustion?

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A chemical reaction that occurs when a substance reacts rapidly with oxygen, producing heat and light.