Physical and Chemical Changes

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What is a mixture?

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A mixture is a combination of two or more substances where each substance retains its own properties and can be separated by physical means.

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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.

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What is a chemical change?

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A chemical change is a process where one or more substances are transformed into new substances with different properties.

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What are some signs of a chemical change?

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Signs of a chemical change include color change, temperature change, formation of a gas, formation of a precipitate, and emission of light.

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What is an example of a physical change?

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Examples of physical changes include melting ice, boiling water, and dissolving sugar in water.

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What is an example of a chemical change?

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Examples of chemical changes include rusting iron, burning wood, and baking a cake.

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How can you separate a mixture?

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You can separate a mixture using methods such as filtration, distillation, or evaporation.

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What happens to the properties of substances in a chemical change?

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In a chemical change, the original substances lose their properties and new substances with different properties are formed.

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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.

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What is an example of a sign that a chemical reaction has occurred?

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Formation of a gas, such as bubbles during a reaction, is a sign that a chemical reaction has occurred.