Physical vs Chemical Changes

Front

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 ripping paper.

Front

What is a chemical change?

Back

A chemical change is a change that results in the formation of new chemical substances. It involves a chemical reaction and can be identified by changes such as color change, gas production, or the formation of a precipitate.

Front

What is conductivity?

Back

Conductivity is the property of matter that allows it to transfer heat or electricity. Materials that conduct electricity well are called conductors.

Front

What evidence indicates a chemical change has occurred?

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Evidence of a chemical change includes color change, temperature change, gas production, formation of a precipitate, or light emission.

Front

Is ripping paper a physical or chemical change?

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Ripping paper is a physical change because the paper's chemical composition remains the same.

Front

What happens when wood is burned?

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When wood is burned, it undergoes a chemical change, producing ash, smoke, and gases, indicating that new substances have formed.

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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. The water is still H2O, just in a different state.

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What happens to copper in the Statue of Liberty?

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The copper in the Statue of Liberty has undergone a chemical change, forming a green patina due to oxidation.

Front

What is the difference between a physical change and a chemical change?

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A physical change alters the form or appearance of a substance without changing its chemical composition, while a chemical change results in the formation of new substances.

Front

What is an example of a chemical change?

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An example of a chemical change is rust forming on iron when it reacts with oxygen and moisture.