Physical and Chemical Properties and Changes

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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 one or more new substances, often accompanied by energy changes such as the release of light or heat.

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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, such as changes in size, shape, or state of matter.

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Example of a chemical change?

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Wood burning is an example of a chemical change because it creates new substances such as ash and smoke.

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Example of a physical change?

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Ice melting is an example of a physical change because it changes from solid to liquid without forming a new substance.

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What happens during a chemical change?

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During a chemical change, the bonds between atoms are broken and new bonds are formed, resulting in the creation of new substances.

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What happens during a physical change?

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

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Is dyeing a shirt a chemical or physical change?

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Dyeing a shirt is a physical change because it alters the color of the shirt without changing its chemical structure.

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What is an example of a physical property?

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An example of a physical property is density, which describes how much mass is contained in a given volume.

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What is an example of a chemical property?

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An example of a chemical property is flammability, which describes how easily a substance can catch fire.

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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 create new substances, while a chemical change results in the formation of new substances.