Science Flashcards

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Mixture

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A combination of two or more substances that are not chemically bonded. Example: Salt and pepper mixed together.

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Pure Substance

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A substance made of only one type of element or compound. Examples: Oxygen (O₂), Hydrogen (H₂), Water (H₂O).

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Type of Mixture That Reacts

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A mixture that causes a chemical reaction when placed in water, creating gas bubbles.

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Observable Physical Properties

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Traits you can observe with your senses. Examples: Color, texture, shape, odor.

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Measurable Physical Properties

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Traits that require tools to measure. Examples: Mass, height, volume.

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Physical Change

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A change in a substance that does not change what the substance is.

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Chemical Change (Chemical Reaction)

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A change where one or more new substances are formed. Examples: Baking, burning, rusting.

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Reactants

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The starting substances in a chemical reaction.

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Products

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The new substances formed after the chemical reaction.

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Soluble

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A substance that can dissolve in a liquid (usually water). Example: Sugar in water.