Chemical and Physical Change

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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 tearing paper, melting ice, and dissolving sugar in water.

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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. Examples include rusting iron and burning wood.

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What is an example of a physical change?

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Slicing bread is an example of a physical change because it alters the shape of the bread without changing its chemical composition.

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What is an example of a chemical change?

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Rusting of a bike is an example of a chemical change because it involves a reaction with oxygen that changes the iron into rust.

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What is a chemical property?

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A chemical property is a characteristic of a substance that can only be observed during a chemical reaction. An example is the ability to rust.

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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 its chemical identity. Examples include color, size, and weight.

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Is dissolving Gatorade powder in water a physical or chemical change?

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Dissolving Gatorade powder in water is a physical change because the powder retains its chemical identity.

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What happens during a chemical change?

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During a chemical change, the atoms in the reactants rearrange to form new substances with different properties.

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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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Can a physical change be reversed?

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Many physical changes can be reversed, such as freezing and melting water, but some may not be easily reversible.