Physical and Chemical 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 melting, freezing, 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 the rearrangement of atoms.

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What happens during a chemical change?

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During a chemical change, bonds between atoms are broken and new bonds are formed, resulting in the creation of new substances.

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Is boiling water a physical or chemical change?

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Boiling water is a physical change because it changes the state of water from liquid to gas without changing its chemical composition.

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Is rusting of iron a physical or chemical change?

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Rusting of iron is a chemical change because it involves a reaction between iron and oxygen, forming a new substance (iron oxide).

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What is an example of a chemical change?

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An example of a chemical change is baking bread, where ingredients undergo a chemical reaction to form new substances.

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What is an example of a physical change?

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An example of a physical change is melting ice, where the ice changes from solid to liquid but remains water.

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

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The main difference is that a physical change does not create new substances, while a chemical change does.

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What is the significance of a chemical change?

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Chemical changes are significant because they result in the formation of new substances that have different properties from the original substances.

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What is an indicator of a chemical change?

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Indicators of a chemical change include color change, temperature change, gas production, and the formation of a precipitate.