Physical and Chemical properties and changes.

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Boiling Point

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A physical property that indicates the temperature at which a substance changes from a liquid to a gas.

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Burning Wood

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A chemical change that occurs when wood reacts with oxygen to produce heat, light, and new substances.

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Changing Color

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A chemical change that can indicate a reaction has occurred, resulting in the formation of new substances.

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Explosion of Fireworks

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A chemical change that involves a rapid reaction producing gas, heat, and light, resulting in a visual display.

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Baking Cookies

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A chemical change where ingredients undergo a reaction to form new substances, resulting in a baked product.

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Physical Property

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A characteristic of a substance that can be observed or measured without changing its identity, such as color, boiling point, or density.

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Chemical Property

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A characteristic that describes a substance's ability to undergo a specific chemical change, such as flammability or reactivity.

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Physical Change

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A change that affects one or more physical properties of a substance without altering its chemical composition, such as melting or freezing.

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Chemical Change

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A change that results in the formation of new chemical substances, often indicated by color change, gas production, or temperature change.

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Examples of Physical Changes

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Melting ice, dissolving sugar in water, breaking glass.