Physical and Chemical Changes Flashcard

Front

What is a physical change?

Back

A physical change is a change in which the chemical properties of a substance remain unchanged, but its appearance or shape changes.

Front

What is a chemical change?

Back

A chemical change is a change that results in the formation of new chemical substances, often accompanied by changes in energy, color, odor, or the formation of gas.

Front

What evidence indicates a chemical change has occurred?

Back

Evidence of a chemical change includes temperature change, change in odor, formation of gas bubbles, or color change.

Front

What happens to the properties of a substance during a physical change?

Back

The properties of a substance remain the same during a physical change; only its form or appearance changes.

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What is an example of a physical change?

Back

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

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What is an example of a chemical change?

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An example of a chemical change is rust forming on iron.

Front

What does the term 'formation of gas bubbles' indicate?

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The formation of gas bubbles is an indication of a chemical change occurring.

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Is melting ice a physical or chemical change?

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Melting ice is a physical change.

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Is copper tarnishing a physical or chemical change?

Back

Copper tarnishing is a chemical change.

Front

What does the term 'state of matter' refer to?

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The state of matter refers to the distinct forms that different phases of matter take on, commonly solid, liquid, gas, and plasma.