Physical and Chemical Changes

Which process is an example of a physical change?

• Carrots are cut into small pieces and mixed into a salad.
• A peanut butter sandwich is eaten and broken down by enzymes in the stomach.
• Sodium metal and chlorine gas are combined to form sodium chloride, or table salt.
• Sodium metal and water are combined to form a basic compound and a flammable gas. 

Marco tears a piece of notebook paper into smaller pieces. Tearing paper into pieces is an example of what kind of change?

• a change in mass
• a physical change
• a chemical change
• a change in energy

There are several differences between chemical and physical changes. Which process is an example of a chemical change?

• steam rising from a  boiling pot of soup.
• a metal railing rusting in damp weather
• alcohol evaporating from a cotton swab
• a piece of wood shrinking as it dries out

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Which process is an example of a chemical change?

• an iron nail rusting
• bath water cooling while you take a bath
• a piece of metal being heated until it expands
• a glass window breaking when hit with a baseball

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

A beaker containing ice and water is placed on a warm hotplate. Will the ice in the beaker undergo a physical or chemical change?

• a physical change because it will change state
• a chemical change because it will change state
• a physical change because it will form a new substance
• a chemical change because it will form a new substance

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4