JDES Physical and Chemical Changes

A student mixed two substances in a test tube, he

noticed that the test tube became warm. He also

noticed an odor coming from the test tube. Based

on Jose's observations, what was

most likely occurring inside the test tube?

• A. The substances were melting.

• B. The substances were evaporating.

• C. The substances were undergoing a chemical

  reaction.

• D. The substances were undergoing an

  endothermic reaction.

Tags

NGSS.MS-PS1-2

Which of the following models a physical

change?

• A. An apple ripens and turns red.

• B. A nail rusts and becomes reddish brown.

• C. A hamburger is cooked and turns brown.

• D. A red apple is cut in half.

A chemical reaction is occurring for certain when

a

• A. solid dissolves.

• B. new substance is formed.

• C. steamlike substance is created.

• D. mixture is made.

Tags

NGSS.MS-PS1-2

After Billy injured his ankle from falling off his

bicycle, his mother placed an ice pack on his

ankle. Pete noticed that the ice in the ice pack

began to melt after about 30 minutes. What was

demonstrated by the melting ice pack?

• A. a chemical change

• B. a physical change

• C. a substance being destroyed

• D. a change in the identity of a substance

Tags

NGSS.MS-PS1-4

Charcoal is often used for outdoor cooking. When

charcoal burns, ashes are left in the bottom of the

grill. What kind of change has taken place?

• A. A solution has formed.

• B. A physical change has occurred.

• C. A mixture has formed.

• D. A chemical change has occurred.

Tags

NGSS.MS-PS1-2

A container has a mixture of salt and sand in it.

How will adding water to the container help to

separate the salt and sand?

• A. Salt will not dissolve in water, and sand will.

• B. Salt will sink, and sand will float to the top.

• C. Salt will dissolve in water, and sand will not.

• D. Salt will float to the top, and sand will sink.

Tags

NGSS.MS-PS1-2

What will happen if water heats on a stove long

enough?

• A. The water will evaporate.

• B. The water will melt.

• C. The mass of the water will increase.

• D. The volume of the water will increase.

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

Which of the following is an example of a physical

change?

• A. leaves burning

• B. plant decaying

• C. ice melting

• D. nail rusting

Tags

NGSS.MS-PS1-4

What happens to water after it is heated

for 10 minutes?

• A. It started to freeze, and the liquid in the pot

  started to turn into a gas.

• B. It started to freeze, and the liquid in the pot

  started to turn into a solid.

• C. It started to boil, and the liquid in the pot started

  to evaporate into a gas.

• D. It started to boil, and the liquid in the pot started

  to condense into a solid.

Tags

NGSS.MS-PS1-4

Which process is NOT the result of a chemical

change during a reaction?

• A. digesting food

• B. burning wood

• C. rusting metal

• D. folding paper

Tags

NGSS.MS-PS1-2