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What is a physical change?

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A physical change is a change that results in no new substances being formed. 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 substances. Examples include burning wood, rusting, and cooking food.

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What is a catalyst?

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A catalyst is a substance that speeds up a chemical reaction without being consumed in the process.

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What is an example of a chemical change?

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Burning wood, rust on a car, and cooking food are all examples of chemical changes.

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What is an example of a physical change?

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Freezing water is an example of a physical change.

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What happens during a chemical reaction?

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During a chemical reaction, reactants are transformed into products, resulting in new substances.

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What is the law of conservation of mass?

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The law of conservation of mass states that mass is neither created nor destroyed in a chemical reaction.

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What are reactants?

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Reactants are the starting substances in a chemical reaction that undergo change.

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What are products?

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Products are the substances formed as a result of a chemical reaction.

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What is an example of a physical property?

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Color, shape, and boiling point are examples of physical properties.