PHYSICAL AND CHEMICAL PROPERTIES

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What is viscosity?

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Viscosity is a measure of a fluid's resistance to flow. A liquid with high viscosity, like oil, is thicker and flows more slowly than a liquid with low viscosity, like vinegar.

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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. Examples include color, density, and magnetism.

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What is a chemical property?

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A chemical property describes a substance's ability to undergo a specific chemical change. Examples include reactivity with acids, flammability, and the ability to rust.

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What is boiling point?

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The boiling point is the temperature at which a liquid turns into a gas. For example, water boils at 100 degrees Celsius (212 degrees Fahrenheit) at sea level.

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What is melting point?

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The melting point is the temperature at which a solid becomes a liquid. For example, ice melts at 0 degrees Celsius (32 degrees Fahrenheit).

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What is malleability?

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Malleability is the ability of a material to be deformed or shaped under compressive stress, often by hammering or rolling. Metals like gold and aluminum are highly malleable.

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What is flammability?

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Flammability is the ability of a substance to catch fire and burn. For example, gasoline is highly flammable, while water is not.

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What is thermal conductivity?

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Thermal conductivity is the ability of a material to conduct heat. Metals like copper have high thermal conductivity, while materials like wood have low thermal conductivity.

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What is the difference between physical and chemical changes?

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A physical change alters the form or appearance of a substance without changing its chemical composition (e.g., melting ice). A chemical change results in the formation of new substances (e.g., rusting iron).

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What is an example of a physical property?

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An example of a physical property is the color of a substance. For instance, copper is reddish-brown.