Chemical and Physical Changes

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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. Examples include rusting of iron and souring of milk.

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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 ice and boiling water.

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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, often by hammering or rolling.

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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 rusting?

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Rusting is a chemical change that occurs when iron reacts with oxygen and moisture in the environment, forming iron oxide (rust).

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What is boiling point?

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The boiling point is the temperature at which a liquid changes to a gas. It is a physical property of a substance.

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What is a physical property?

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A physical property is a characteristic of a substance that can be observed or measured without changing its chemical identity, such as color, density, and melting point.

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What is a chemical property?

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A chemical property is a characteristic of a substance that describes its ability to undergo a specific chemical change, such as reactivity with acids or bases.

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Give an example of a chemical change.

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An example of a chemical change is the reaction of vinegar and baking soda, which produces carbon dioxide gas.

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Give an example of a physical change.

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An example of a physical change is the freezing of water into ice.