Physical Science | Concept 1.2 - Characteristic Properties

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What is a physical change?

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A change that does not alter the chemical composition of a substance, such as melting, freezing, or dissolving.

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What is a chemical change?

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A change that results in the formation of new chemical substances, such as burning, rusting, or cooking.

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What is density?

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The mass of an object per unit volume, often expressed in grams per cubic centimeter (g/cm³).

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What is a physical property?

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A characteristic of a substance that can be observed without changing its chemical identity, such as color, odor, or melting point.

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What is a chemical property?

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A characteristic that can only be observed during a chemical reaction, such as reactivity with acids or bases.

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What is a base in chemistry?

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A substance that accepts protons in a chemical reaction, often having a bitter taste and slippery feel.

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What is an acid in chemistry?

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A substance that donates protons in a chemical reaction, often having a sour taste and can react with metals.

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

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A physical change does not change the substance's chemical identity, while a chemical change results in new substances being formed.

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What is an example of a physical change?

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Melting of ice into water.

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What is an example of a chemical change?

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Burning of gasoline.