Chemical and Physical Changes and Properties

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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 boiling water, melting ice, and ripping paper.

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What is a chemical change?

Back

A chemical change is a change that results in the formation of new chemical substances. Examples include burning a candle, baking cupcakes, and rusting iron.

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What happens to the particles in a solid?

Back

In a solid, particles are tightly packed together and vibrate in place, giving solids a definite shape and volume.

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What happens to the particles in a liquid?

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

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What happens to the particles in a gas?

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In a gas, particles are far apart and move freely, filling the entire volume of their container and having no definite shape or volume.

Front

Is boiling water a physical or chemical change?

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Boiling water is a physical change because it changes from liquid to gas without altering its chemical composition.

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Is a candle burning a physical or chemical change?

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A candle burning is a chemical change because it produces new substances, such as carbon dioxide and water vapor.

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What is an example of a physical change?

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An example of a physical change is ripping up paper, as it changes the form of the paper but not its chemical composition.

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What is an example of a chemical change?

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An example of a chemical change is baking cupcakes, as it involves a chemical reaction that produces new substances.

Front

What is the definition of matter?

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Matter is anything that has mass and takes up space. It exists in three states: solid, liquid, and gas.