Review 1

Front

What is the action force when a bowling ball hits the pins?

Back

The action force is the bowling ball hitting the pins.

Front

What is a chemical change?

Back

A chemical change occurs when substances combine or break apart to form new substances, such as mixing two clear liquids to form a blue liquid.

Front

What happens when lithium metal is dropped into water?

Back

A new substance is created because this is a chemical change.

Front

What type of change occurs when a new substance is formed?

Back

Chemical change.

Front

In which direction is the Earth's axis pointed during winter in the hemisphere experiencing winter?

Back

The axis is pointed away from the sun.

Front

What is an example of a physical change?

Back

Melting ice is an example of a physical change.

Front

What is the definition of 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 an example of a chemical change?

Back

Burning wood is an example of a chemical change.

Front

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

Back

A physical change does not create new substances, while a chemical change does.

Front

What is the definition of a chemical reaction?

Back

A chemical reaction is a process that leads to the transformation of one set of chemical substances to another.