Physical and Chemical Changes in Matter

What is a physical change?

• A change that alters the form or appearance of matter without forming a new substance.

• A change that results in the formation of a new substance.

• A change that involves the release of energy in the form of light.

• A change that is always irreversible.

Which of the following is an example of a chemical change?

• Melting ice cubes into water.

• Burning wood into ashes.

• Mixing sand with water.

• Cutting a slice of bread.

What happens when sugar is added to tea?

• A chemical change occurs, forming a new substance.

• A physical change occurs, but both substances remain the same.

• The sugar disappears completely.

• The tea loses its sweetness.

Explain how the process of toasting bread involves both physical and chemical changes.

Discuss the signs that indicate a chemical change has occurred.

How can you distinguish between a physical and a chemical change?

Describe a real-world example where both physical and chemical changes occur simultaneously.

What physical and chemical changes are involved in burning a candle? Distinguish between physical and chemical change.

You and a friend are using colored markers and white posterboard to make posters for your college and career class. Your friend says that a chemical change occurred because the markers changed the color of the posterboard. Do you agree? Explain your answer

The word distinct means “separate” or “different.” Write a sentence that

explains why water is distinct from the substances that make it up. (H₂O)