Matter and its Changes - Physical and Chemical Changes

These are changes in matter that do not alter the identity or nature of the matter itself. Also, the substance can be returned back to its original form or state.

(a)  

Tags

NGSS.MS-PS1-4

All of these are Physical Changes EXCEPT:

• change shape, texture, or size

• it splits or breaks apart

• dissolution

• change of phase or state

• decomposition

This is a change in matter that occurs when matter becomes something completely new.

A new substance is formed, and the change cannot be simply “undone."

(a)  

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

These are all examples of chemical changes EXCEPT:

• gasoline is ignited

• our body digests food

• white bread turns brown after being toasted

• liquid milk goes sour and forms solids

• oil spill on seawater

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

When farmer observed the green apple already turned to red, he prepares it for shipment. What type of change happened to the apple?

• Physical Change

• Chemical Change

• Color change

• Phase change

Tags

NGSS.MS-PS1-2

When the pizza was served, it was filled with melted mozzarella cheese on top. The cheese underwent what type of change?

• Physical change

• Chemical change

• Texture change

• Shape change

When hydrogen peroxide was added to the wound, we can see bubbles. What type of change happened here?

• Physical change

• Chemical change

• Phase change

  (liquid to gas)

• No change. Gas absorbed in the peroxide was simply released due to body temperature.

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

A cold glass of lemon juice was placed on the table on a hot day. After a few minutes, droplets of water were seen on the side of the glass. What type of change was observed?

• Physical change

• Chemical change

• Cohesion of water molecules

• Filtration (water from juice passed through the small pores of the glass)

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-5

A bottle of yogurt was mistaken left for a few days inside the cabinet. When the bottle was opened, the smell stinks. What type of change happened?

• Physical change

• Chemical change

• Evaporation (liquid yogurt evaporated to a stinky gas)

• No change. Yogurt simply released some gaseous ingredients.

Tags

NGSS.MS-PS1-2

Cocoa powder, sugar, cream powder, and crushed ice were blended, placed in a glass bottle and served as chocolate frappe. What type of change was done?

• Physical change

• Chemical change

• Color change

• Chemical reaction resulted to gas bubbles trapped in the mixture.

Tags

NGSS.MS-PS1-2