Physical vs. Chemical Properties/Changes

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

Is melting butter for popcorn a chemical or physical change?

• chemical
• physical

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

A solid piece of chocolate is melted and changed to liquid form. Which property of the piece of chocolate will remain the same?

• Texture
• Temperature
  
• Shape
•  Mass

Tags

NGSS.MS-PS1-4

NGSS.MS-PS1-5

Freezing Juice?

• Physical Change
• Chemical Change

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

NGSS.MS-PS3-5

A change in phase ...

• Chemical Change
• Physical Change

Tags

NGSS.MS-PS1-4

Bubbles form when two or more substances are combined ...

• Chemical Change
• Physical Change

Tags

NGSS.MS-PS1-2

Change in size ...

• Chemical Change
• Physical Change

Tags

NGSS.MS-PS1-4

To go back to the substances original states is not possible or you would need to use chemicals. 

• Chemical
• Physical

Causes a change in temperature ...

• Chemical Reaction
• Physical Reaction

Causes a change in odor ...

• Chemical Reaction 
• Physical Reaction

Tags

NGSS.MS-PS1-2