Physical vs. Chemical Change

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-PS1-2

NGSS.MS-PS1-4

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

Which of the following is NOT an example of a physical change?

• crumpled paper
• pencil sharpening
• shrunken clothing
• rust

Tags

NGSS.MS-PS1-2

A change where one or more new substances are created.

• Physical Change 
• Chemical Change 

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Ava added 6 g of liquid wax to a cup that weighed 12 g. What is the weight of the cup after the wax solidifies?

• 6 g

• 18 g

• 12 g

• 24 g

Tags

NGSS.MS-PS1-5

When you break a cracker into pieces it is a...

• Chemical change
• Physical change

Which of these is a result of a chemical change?

• A mixture
• A solution
• A new substance
• Melting or freezing

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Which of these does NOT happen during a chemical change?

• Atomic bonds are formed or break apart
• New substance(s) are formed with different chemical properties
• The number of atoms in the reaction stays the same
• The chemical properties of the beginning substance(s) are the same as those of the end product(s)

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

A copper penny turning greenish after a few years is an example of ...

• Chemical Change
• Physical Change

Tags

NGSS.MS-PS1-2