Chemical and physical changes and properties

What does a chemical change result in?

• A phase change in the substance (ex. liquid to solid)
• A change in texture of the substance.
• A change in the way atoms are bonded to each other.
• A change in the way atoms are arranged in space.

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

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

• Baking a birthday cake
• A glass falling and shattering on the floor
• Burning a piece of paper
• Baking soda and vinegar mixing together

Tags

NGSS.MS-PS1-2

Identify what’s happening in the picture (ice melting) as a chemical or physical change.

• Chemical
• Physical
• Both

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-4

Identify what’s happening in the picture (marshmallow burning) as a chemical or physical change.

• Chemical
• Physical
• Both

Tags

NGSS.MS-PS1-2

A statue corroded by acid rain is a chemical change.

• True
• False

Tags

NGSS.MS-PS1-2

Why is the picture (pencil breaking) an example of a physical change?

• The pencil can no longer be used.
• The pencil is a different size.
• The materials making up the pencil did not change.
• The materials making up the pencil are different.

Tags

NGSS.MS-PS1-2

When iron is exposed to water vapor and air, it rusts. This is an example of a ________ change.

• Chemical
• Physical
• Both

Tags

NGSS.MS-PS1-2

Does the change from (a) to (b) represent a chemical or physical change? Look carefully at the molecules.

• Chemical
• Physical
• Both

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-4

Does the following represent a chemical or physical change?

• Chemical

• Physical

• Both

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Which of the following is a sign that a chemical reaction has occurred?

• change in shape
• melting
• formation of a gas
• dissolving

Tags

NGSS.MS-PS1-2