Matter Unit Test

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What is density?

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Density is the mass of an object divided by its volume. It determines how heavy an object is for its size.

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What are physical properties?

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Physical properties are characteristics of a substance that can be observed or measured without changing the substance's identity, such as color, shape, and size.

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What are chemical properties?

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Chemical properties are characteristics that describe a substance's ability to undergo changes that transform it into different substances, such as flammability and reactivity.

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What is a chemical change?

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A chemical change occurs when a substance transforms into one or more different substances, often indicated by changes in color, temperature, or the formation of gas or precipitate.

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What is a physical change?

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A physical change is a change that affects one or more physical properties of a substance without altering its chemical composition, such as melting or freezing.

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How can you determine if an object will float or sink in water?

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An object will float if it is less dense than water and sink if it is more dense than water.

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What is an example of a chemical change?

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An example of a chemical change is burning wood, which produces ash and smoke.

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What is an example of a physical change?

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An example of a physical change is ice melting into water.

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What does it mean for a substance to dissolve?

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Dissolving is the process where a solute mixes with a solvent to form a solution, without changing the chemical identity of the solute.

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What is a solute?

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A solute is a substance that is dissolved in a solution, such as salt in saltwater.