Chemical vs Physical Changes Flashcard

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What is a physical change?

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A physical change is a change that affects one or more physical properties of a substance without altering its chemical composition. Examples include freezing, melting, and dissolving.

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What is a chemical change?

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A chemical change is a change that results in the formation of new chemical substances. It involves a chemical reaction and includes processes like burning, rusting, and fermentation.

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What are signs of a chemical reaction?

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Signs of a chemical reaction include: 1) Change in temperature, 2) Change in color, 3) Formation of a precipitate, 4) Production of gas.

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What is an example of a physical change?

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An example of a physical change is the freezing of water into ice.

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What is an example of a chemical change?

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An example of a chemical change is burning wood.

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What does it mean when a gas is produced in a reaction?

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The production of gas indicates that a chemical reaction has occurred, often signifying the formation of new substances.

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What is the difference between a physical change and a chemical change?

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A physical change does not alter the chemical composition of a substance, while a chemical change results in new substances being formed.

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What is a precipitate?

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A precipitate is a solid that forms and settles out of a liquid mixture during a chemical reaction.

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What does 'change in temperature' indicate in a reaction?

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A change in temperature during a reaction indicates that a chemical reaction may have taken place, often releasing or absorbing energy.

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What is rusting?

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Rusting is a chemical change that occurs when iron reacts with oxygen and moisture, forming iron oxide (rust).