Chemical and Physical Changes

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What is a chemical change?

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A chemical change is a process where one or more new substances are formed, often accompanied by changes in properties such as color, temperature, or the production of gas.

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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, shape, or size.

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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 (bubbles), and the formation of a precipitate.

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Is melting ice a chemical or physical change?

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Melting ice is 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 in the reactants break and new bonds form to create products with different properties.

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What is an example of a chemical change?

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An example of a chemical change is rusting of iron, where iron reacts with oxygen to form iron oxide.

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What is an example of a physical change?

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An example of a physical change is dissolving sugar in water, where the sugar retains its chemical identity.

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What is the difference between a chemical change and a physical change?

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A chemical change results in the formation of new substances, while a physical change does not change the chemical identity of the substance.

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What is the term for a change in the state of matter?

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A change in the state of matter is called a physical change, such as melting, freezing, or boiling.

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What is an example of a physical change involving temperature?

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An example of a physical change involving temperature is boiling water, where water changes from liquid to gas.