7th Grade Semester Test Review

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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 the substance's chemical identity. Examples include color, odor, melting point, and boiling 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. Examples include flammability, reactivity with acids, and oxidation states.

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What is a solute?

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A solute is a substance that is dissolved in a solution. For example, sugar is a solute when it dissolves in water.

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What is a solvent?

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A solvent is a substance that dissolves a solute, resulting in a solution. Water is often referred to as the 'universal solvent' because it can dissolve many substances.

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What is a solution?

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A solution is a homogeneous mixture of two or more substances, where one substance (the solute) is dissolved in another (the solvent).

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What is the state of matter where molecules are far apart and move freely?

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The state of matter is gas. In gases, molecules are widely spaced and can move freely.

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What is the definition of solubility?

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Solubility is the ability of a substance to dissolve in a solvent at a given temperature and pressure.

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What happens to the molecules in a solid?

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In a solid, molecules are closely packed together and vibrate in place, maintaining a fixed shape and volume.

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What happens to the molecules in a liquid?

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In a liquid, molecules are close together but can move past one another, allowing liquids to take the shape of their container while maintaining a fixed volume.