Exploring Physical and Chemical Changes in the Lab

What type of change occurs when toothpicks are broken?

• No change

• Biological change

• Chemical change

• Physical change

What is the purpose of using a Bunsen burner in the experiment with toothpicks?

• To cool the toothpicks

• To dissolve the toothpicks

• To observe combustion

• To weigh the toothpicks

Tags

NGSS.MS-PS3-3

What does the appearance of smoke indicate when heating toothpicks?

• Physical change

• Chemical change

• No change

• All changes

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

What is the result of adding water to sodium chloride in the lab?

• Formation of a solid

• Dissolution into ions

• Temperature increase

• Color change

Tags

NGSS.MS-PS1-2

What happens when silver nitrate is added to the sodium chloride solution?

• Color change

• Gas release

• Temperature drop

• Precipitate formation

Tags

NGSS.MS-PS1-2

What indicates a chemical change in the experiment with copper chloride and aluminum?

• Dissolution of aluminum

• Formation of bubbles

• Precipitate formation

• Change in color

Tags

NGSS.MS-PS1-2

What is observed when copper sulfate pentahydrate is heated?

• It turns white

• It remains unchanged

• It dissolves

• It explodes

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-4

What does the addition of ammonia to copper sulfate solution result in?

• Precipitate dissolving

• Decrease in volume

• Color change to blue

• Formation of a solid

Tags

NGSS.MS-PS1-2

What is the effect of rehydrating copper sulfate anhydrous?

• No visible change

• Becomes a gas

• Turns blue

• Forms a precipitate

Tags

NGSS.MS-PS1-2

What type of change is involved when acetic acid reacts with sodium bicarbonate?

• Physical change

• State change

• No change

• Chemical change

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5