SC 8 P 9 3

Mrs. Winston decides to do a demonstration for her class with a piece of chalk. Using a balance, Mrs. Winston discovers that the mass of the chalk is 20 g. She then takes the piece of chalk and crushes into a fine powder. The cumulative mass of the fine powder is 20 g. What has Mrs. Winston demonstrated for her class?

• a chemical change involving change of shape and size of matter

• a chemical change involving change of mass

• a physical change involving change of shape and size of matter

• a physical change involving change of mass

A change in the size, shape, or state of matter.

• chemical change

• physical change

• chemical reaction

• electron change

Tags

NGSS.MS-PS1-4

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

• crumpled paper

• pencil sharpening

• shrunken clothing

• sour milk

Which is a chemical change?

• freezing fruit juice

• slicing a potato

• boiling water

• copper metal turning green

Tags

NGSS.MS-PS1-2

What happens in ALL chemical changes?

• Change in state of matter

• A new substance is formed

• Bubbles are produced

• An explosion

Tags

NGSS.MS-PS1-2

Which is the best example of a heterogeneous mixture?

• sugar

• brass

• salad

• salt water

Which is a homogeneous mixture?

• pizza

• vinegar

• concrete

• woven fabric

Which type of matter can be separated by physical means?

• atom

• element

• compound

• mixture

A substance contains two different components joined by physical means. Which best describes the substance?

• element

• compound

• mixture

• water

Matter can not be created nor destroyed: it can only be

• Destroyed a little bit

• Invisible

• Transformed, changed

• None of the above

Tags

NGSS.MS-PS1-5