Unit 4 Flashcard 1 (Changing Matter)

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.

Front

What is a chemical change?

Back

A chemical change is a change that results in the formation of one or more new substances with different properties.

Front

Give an example of a physical change.

Back

Breaking a cracker into pieces is an example of a physical change.

Front

Give an example of a chemical change.

Back

Burning wood is an example of a chemical change.

Front

What happens to ice when it melts?

Back

When ice melts, it undergoes a physical change and turns into water.

Front

What is a sign that a chemical reaction has occurred?

Back

The formation of a gas is a sign that a chemical reaction has occurred.

Front

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

Back

You can differentiate them by observing if a new substance is formed with different properties.

Front

What is the definition of matter?

Back

Matter is anything that has mass and takes up space.

Front

What are the two main types of changes in matter?

Back

The two main types of changes in matter are physical changes and chemical changes.

Front

What is an example of a physical property?

Back

Color, shape, and density are examples of physical properties.