Dcp Review

For an investigation a student poured a blue solution of CuSO4 into a beaker. The student placed a shiny, silver-colored strip of zinc metal in the solution and observed the changes. The student inferred that a chemical reaction occurred. What evidence supports this inference?

• A dark solid formed on zinc metal.

• The zinc metal remained silver-colored and shiny

• The CuSO4 soultion turned blue when the zinc metal was added

• None of these

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

A scientist performed four investigations using eight different liquids. In each investigation, the scientist combined two of the four liquids under a fume hood and recorded observations in the table below.

In which two investigations is it most likely that the liquids reacted chemically?

• 1

• 2

• 3

• 4

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

The graph below shows the motion of a ball rolling on a straight track. What is the ball’s average speed during the time represented in the graph?

• 0.2 m/s

• 0.5 m/s

• 5.0 m/s

• 10.0 m/s

Tags

NGSS.MS-PS3-1

Which box has a higher density?

• A

• B

• They are the same

A change that results in the formation of new chemical substances

• chemical change

• physical change

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

A change where one or more new substances are created.

• Physical Change 

• Chemical Change 

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

SpongeBob is pushing a boat with a force of 10 N to the right, while Patrick is pushing it with a force of 10 N to the left. What is the net force?

• 10 N

• 0 N

• 25 N

• 1 N

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2

Which of the following is a chemical change?

• Melting of ice

• Rusting of iron

• Boiling of water

• Breaking of glass

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

What is the process of converting a liquid into a gas called?

• Condensation

• Evaporation

• Sublimation

• Freezing

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

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

• Burning wood

• Dissolving sugar in water

• Rusting of iron

• Cooking an egg