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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. Examples include burning, rusting, and souring of milk.

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What is a physical property?

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A physical property is a characteristic of a substance that can be observed or measured without changing the substance's chemical identity. Examples include color, density, volume, and state of matter.

Front

What is a chemical property?

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A chemical property is a characteristic of a substance that becomes evident during a chemical reaction. It describes the substance's potential to undergo chemical changes. Examples include flammability and reactivity with acids.

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What happens to ice cream when it melts?

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When ice cream melts, it undergoes a physical change from solid to liquid due to an increase in temperature.

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What is the volume of 150 grams of lead with a density of 11.3 g/cm³?

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The volume is 13.3 cm³.

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Which of the following is NOT a physical change: crumpled paper, pencil sharpening, shrunken clothing, or sour milk?

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Sour milk is NOT a physical change; it is a chemical change.

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What is an example of a physical property of mercury?

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Mercury is a metal that is liquid at room temperature, which is a physical property.

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What is the difference between physical and chemical changes?

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Physical changes do not alter the chemical composition of a substance, while chemical changes result in new substances being formed.

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What is an example of a chemical change?

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Burning wood in a bonfire is an example of a chemical change.