Physical and Chemical Changes

Front

Is this an example of a physical or chemical change?

Back

physical

Answer explanation

This is an example of a physical change because it does not involve a change in the chemical composition of the substance. It is still water molecules, just in a different state of matter.

Tags

MS-PS1-2

Front

Is glass breaking a chemical or physical change?

Back

physical

Answer explanation

Glass breaking is a physical change because it does not involve a change in the chemical composition of the glass. The glass is just broken into smaller pieces

Tags

MS-PS1-2

Front

Salt dissolves in water

Back

physical Change

Answer explanation

Salt dissolves in water is a physical change because it does not involve a chemical reaction. No new substances are made, it is still salt and water.

Tags

MS-PS1-2

Front

Which is a chemical change?

freezing fruit juice

,

slicing a potato

,

boiling water

,

copper metal turning green

Back

copper metal turning green

Answer explanation

Copper metal turning green is a chemical change because it involves a chemical reaction that results in a new substance being formed. We know that a new substance is made because an unexpected color change happens.

Tags

MS-PS1-2

Front

Which of the following options provides evidence of a CHEMICAL change?

• Wood is burned releasing ash and smoke
• Rocks separate when soil is sifted
• Boiling water bubbles when heated
• Salt dissolves in water

Back

Wood is burned releasing ash and smoke

Answer explanation

Burning wood releases ash and smoke, indicating a chemical change.

Tags

MS-PS1-2

Front

How did Josh know that a chemical reaction occurred when he mixed vinegar with baking soda?

Back

The formation of a gas

Answer explanation

Josh knew that a chemical reaction occurred because of the formation of a gas. Gas production is a sign of chemical change. (Only if the formation of gas is NOT due to a phase change).

Tags

MS-PS1-2

Front

Physical change is

Back

A change of matter from one form to another without turning into a new substance.

Answer explanation

Physical change is a change of matter from one form to another without turning into a new substance.

Tags

MS-PS1-2

Front

Is the process of water evaporating a physical or chemical change?

Back

Physical

Answer explanation

The process of water evaporating is a physical change because it involves a change in state from liquid to gas without any chemical reactions.

Tags

MS-PS1-2

Front

What evidence would indicate a chemical change has occurred?

Back

Unexpected change in color

Answer explanation

A change in color is evidence of a chemical change.

Tags

MS-PS1-2

Front

Who is right about the paint color change being a chemical change: Student A or Student B?

Back

Student B is right. The color change did NOT indicate a new substance was created because it was expected to turn purple.

Answer explanation

The correct answer is Student B. The color change occurred due to the mixing of colors, not the creation of a new substance.

Tags

MS-PS1-2