Changes in Matter

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What is a chemical change?

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A chemical change is a process where substances combine or break apart to form new substances with different properties. Example: Rusting of iron.

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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. Example: Melting ice.

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What happens to the properties of a substance during a chemical change?

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The properties of the original substances change, and new substances with different properties are formed.

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What happens to the properties of a substance during a physical change?

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The properties may change (like shape or state), but the chemical composition remains the same.

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Is boiling water a chemical or physical change?

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Boiling water is a physical change because it changes from liquid to gas without altering its chemical structure.

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Is dissolving sugar in water a chemical or physical change?

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Dissolving sugar in water is a physical change because the sugar can be recovered by evaporating the water.

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What is an example of a chemical change?

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An example of a chemical change is the burning of wood, which produces ash and smoke.

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What is an example of a physical change?

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An example of a physical change is freezing juice, which changes its state from liquid to solid.

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What is the significance of the Grand Canyon's formation?

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The formation of the Grand Canyon is a physical change caused by erosion and weathering over millions of years.

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What is rusting an example of?

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