Review Physical and CHemical Properties and 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 state, such as melting or boiling.

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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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Give an example of a physical change.

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An example of a physical change is honey dissolving in tea.

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What happens during condensation?

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During condensation, a gas turns into a liquid as it cools down, which is a physical change.

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What causes iron to rust?

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Iron rusts due to a chemical reaction with oxygen and moisture in the environment, resulting in a chemical change.

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Is rusting of iron a physical or chemical change?

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Rusting of iron is a chemical change.

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What occurs when water is heated to boiling?

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When water is heated to boiling, it changes from a liquid to a gas (steam), which is a physical change.

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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 the formation of new substances.

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What are some indicators 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.

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What is an example of a chemical change in everyday life?

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An example of a chemical change in everyday life is the burning of wood, which produces ash, smoke, and gases.