Chemical and Physical Changes in Matter

A change in the appearance of a substance, but not the chemical structure:

• Physical Change

• Chemical Change

• Physical or Chemical Change

• Neither

Which are evidence of a chemical change? (Choose more than one answer)

• Color change

• Gas Production

• Light Production

• Precipitate

Tags

NGSS.MS-PS1-2

A chemical change is:

• when no change happens to a substance

• When a substance is altered on a molecular level

• When only the appearance of a substance changes

• None of these

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Photosynthesis involves combining of water and carbon dioxide to form glucose and oxygen. So this is a:

• Physical Change

• Chemical Change

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Is a chemical change usually reversible?

• Yes

• No

Is a physical change sometimes reversible?

• Yes

• No

Which one would be evidence of a chemical change?

• Ashes left from a campfire

• A puddle from melted ice

• Scraps of paper that were torn

Tags

NGSS.MS-PS1-2

A chemical change is usually irreversible

• True

• False

Choose all that are results of a chemical change:

• A glow stick

• A baked cake

• Luminol glowing

• Frozen water

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Rust forming is a simple physical change.

• True

• False