Understanding Changes in Matter

Which of the following is an example of a physical change?

• Burning wood

• Melting ice

• Rusting iron

• Baking a cake

Tags

NGSS.MS-PS1-4

What is a common indicator that a chemical change has occurred?

• Change in size

• Change in shape

• Formation of a gas

• Dissolving sugar in water

Tags

NGSS.MS-PS1-2

Which process involves a change in the state of matter?

• Freezing water

• Burning paper

• Rusting a nail

• Cooking an egg

Tags

NGSS.MS-PS1-4

A student observes a color change when two clear solutions are mixed. What does this most likely indicate?

• A physical change

• A chemical change

• A change in state

• A change in size

Tags

NGSS.MS-PS1-2

Which of the following is evidence that a precipitate has formed during a reaction?

• A solid forms in a previously clear solution

• The solution changes temperature

• The liquid evaporates

• The solution is stirred

Which property is a chemical property of iron?

• Melting point

• Density

• Tendency to rust

• Color

Tags

NGSS.MS-PS1-5

Which of the following is NOT a physical change?

• Cutting paper

• Boiling water

• Dissolving salt in water

• Burning gasoline

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Which evidence would best help you determine if a change is chemical rather than physical?

• Change in shape

• Change in size

• Formation of a new substance

• Change in state

Tags

NGSS.MS-PS1-2

A student mixes two solutions and observes bubbles forming. What does this observation suggest about the type of change?

• Physical change, because bubbles always mean a change in state

• Chemical change, because gas is produced

• Physical change, because the solutions are still liquids

• No change has occurred

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

A metal object is left outside and develops a reddish-brown coating over time. Using evidence, explain whether this is a physical or chemical change and why.

• Physical change, because only the color changes

• Chemical change, because a new substance (rust) forms

• Physical change, because the metal is still present

• Physical change, because the shape does not change

Tags

NGSS.MS-PS1-2