Chemical and Physical Changes

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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 melting, freezing, and dissolving.

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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, burning, and fermentation.

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What happens when ice melts?

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When ice melts, it undergoes a Physical Change from solid to liquid water without changing its chemical composition.

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What happens when water is heated to form steam?

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When water is heated to form steam, it undergoes a Physical Change as it changes from liquid to gas without altering its chemical structure.

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What is rusting?

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Rusting is a Chemical Change that occurs when iron reacts with oxygen and moisture in the air, forming iron oxide (rust).

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What is Malleability?

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Malleability is a Physical Property that describes a material's ability to be deformed or shaped under compressive stress, such as being hammered into thin sheets.

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What is Toxicity?

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Toxicity is a Chemical Property that describes the degree to which a substance can harm living organisms.

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What is Flammability?

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Flammability is a Chemical Property that indicates how easily a substance can ignite and burn in the presence of an ignition source.

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What is Reactivity?

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Reactivity is a Chemical Property that describes how readily a substance undergoes a chemical reaction with other substances.

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What is an example of a Physical Change?

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An example of a Physical Change is the melting of ice into water.