1st Semester Study Guide

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What is a physical change?

Back

A physical change is a change that affects one or more physical properties of a substance without altering its chemical composition. Examples include melting, freezing, and dissolving.

Front

What is a chemical change?

Back

A chemical change occurs when a substance transforms into one or more new substances with different properties. This often involves a chemical reaction.

Front

What is a heterogeneous mixture?

Back

A heterogeneous mixture is a combination of two or more substances that are not uniform throughout, meaning you can see the different parts.

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What is a homogeneous mixture?

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A homogeneous mixture is a mixture that is uniform in composition, meaning the different components are not visible and are evenly distributed.

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What is an independent variable?

Back

An independent variable is the variable that is changed or controlled in a scientific experiment to test its effects on the dependent variable.

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What is a dependent variable?

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A dependent variable is the variable that is measured and affected in an experiment, responding to changes in the independent variable.

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How do you calculate volume using density?

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Volume can be calculated using the formula: Volume = Mass / Density.

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What is density?

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Density is the mass of a substance per unit volume, typically expressed in grams per cubic centimeter (g/cm³).

Front

What is a physical property?

Back

A physical property is a characteristic of a substance that can be observed or measured without changing its chemical identity, such as color, melting point, and density.

Front

What is a chemical property?

Back

A chemical property describes a substance's ability to undergo a specific chemical change, such as flammability or reactivity with acids.