Physical and Chemical Properties and Changes

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What is a chemical change?

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A chemical change is a process where one or more substances are transformed into different substances with new chemical properties, such as burning paper or rusting metal.

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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, or hardness.

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What is hardness in materials?

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Hardness is the ability of a material to resist scratching or indentation, often tested by seeing which material can scratch another.

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What is the formula for density?

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Density = mass / volume.

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What is conductivity?

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Conductivity is the ability of a material to conduct electric current or heat.

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What are examples of physical changes?

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Examples of physical changes include melting ice, boiling water, and dissolving sugar in water.

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What is the difference between a physical change and a chemical change?

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A physical change alters the form or appearance of a substance without changing its chemical composition, while a chemical change results in the formation of new substances.

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What is mass?

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Mass is a measure of the amount of matter in an object, typically measured in grams or kilograms.

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What is volume?

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Volume is the amount of space that a substance occupies, usually measured in liters or cubic centimeters.

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What is solubility?

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Solubility is the ability of a substance to dissolve in a solvent, such as salt dissolving in water.