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

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

• crumpled paper
• pencil sharpening
• shrunken clothing
• rust

A change where one or more new substances are created.

• Physical Change 
• Chemical Change 

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Fizzing, foaming, and burning are all examples of

• Chemical change
• Physical change

Tags

NGSS.MS-PS1-2

The melting of wax is an example of a

• chemical change

• physical change

Tags

NGSS.MS-PS1-4

Which is an example of a chemical reaction?

• paper cut into small pieces
• chocolate melting in a pan
• flour and sugar mixed in a bowl
• cookies baking in an oven

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

If two liquids of the same temperature are mixed together and a thermometer shows a temperature increase, this change is a

• Chemical reaction

• Physical change

• Chemical change

• A gas being produced

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-4

What is matter

• A substance that takes part in and undergoes a change in reaction

• Anything that has mass and takes up space

• solids, liquids and gases

• substances released during a chemical change

Tags

NGSS.MS-PS1-5

When I mix 2 liquids and one floats on top of the other, Is this a physical or chemical change?

• physical

• chemical

• neither

• both