Properties & Types of Matter + Counting Atoms in Equatoins

Is melting butter for popcorn a chemical or physical change?

• chemical
• physical

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

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

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

NGSS.MS-PS1-5

A mixture is the result of a physical change because...

• The parts can be separated
• A new substance is made
• There is a chemical reaction
• One part of the mixture disappears

 

Which is an example of a physical

change?

• a candle burning

• baking a cake

• evaporating water

• metal rusting

Anything that has mass and takes up space

• compound

• element

• matter

• substance

Josh decided to mix some vinegar with baking soda. He knew that a reaction occurred because he made careful observations. He noted that the mixture started to foam up and bubble, and it was white in color. How did Josh know that a chemical reaction occurred?

He was sure a reaction occurred because of

• the color of the mixture

• the smell of the vinegar

• the volume of the mixture

• the formation of a gas

Tags

NGSS.MS-PS1-2

a change in a substance that does not involve a change in the identity of the substance

• Physical change

• Chemical Change

Which of the following is NOT a sign of a chemical change?

• formation of a precipitate

• unexpected color change

• unexpected temperature change

• change in state of matter

Tags

NGSS.MS-PS1-2