Chemical and Physical Changes

In which of the following actions does a physical change occur to separate a mixture?

• stirring chocolate syrup into milk

• evaporating water from salt water

• freezing a solution of sugar and water

• adding sand to a beaker of water

Ice cubes are placed on a table in a warm room. What happens to the ice particles?

• The particles become larger.

• The particles move slower.

• The particles move faster.

• The particles change shape.

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

Two clear substances are combined inside a plastic bag. The plastic bag is tightly sealed. What observation would indicate that mixing the chemical produced a new substance?

• The substance in the bag becomes warm.

• The bag is transparent.

• The substances are clear.

• The bag can hold a liquid.

Tags

NGSS.MS-PS1-2

Four substances were mixed with a clear liquid. The observations are recorded in the table shown below. Based on the observations, which mixture produced the best evidence that a new substance was formed?

• Substance 1

• Substance 2

• Substance 3

• Substance 4

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Select the THREE clues or evidence that a chemical change has occurred on a substance.

• creates a gas

• temperature changes

• new substance forms

• substance melts

• shape changes

Tags

NGSS.MS-PS1-2

Water that is heated and changed to steam is a 

• Physical change
• Chemical change

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

Melting butter to pour over popcorn is a 

• Chemical change
• Physical change

Tags

NGSS.MS-PS1-4

Which action would be a chemical change?

• freezing water
• tearing paper
• cleaning pennies
• melting chocolate

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Burning wood is an example of 

• Chemical change
• Physical change

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-4

Frying an egg is an example of a 

• Chemical change
• Physical change

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

NGSS.MS-LS1-7