Physical and Chemical Changes

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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 changes in size, shape, or state of matter.

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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 changes the chemical composition of the substance.

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Is melting ice a physical or chemical change?

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Melting ice is a physical change because it changes from solid to liquid without altering 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 with oxygen to form a new substance, iron oxide.

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What happens during a physical change?

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During a physical change, the form of a substance changes, but its chemical identity remains the same.

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What happens during a chemical change?

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During a chemical change, the substances involved undergo a transformation that results in the formation of new substances with different properties.

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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 from liquid to gas without changing its chemical composition.

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Is burning wood a physical or chemical change?

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Burning wood is a chemical change because it reacts with oxygen to produce ash, smoke, and gases, forming 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 breaking a glass, which changes its shape but not its chemical composition.

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What is an example of a chemical change?

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An example of a chemical change is baking a cake, where ingredients react to form a new product.