Unit 6 Review

Which temperature represents absolute zero?

• 0 K

• 0 C

• 273 K

• 273 C

The Time Temperature graph shows the relationship between temperature and time as heat/energy is added. The substance is in the solid phase at Time = 0 minutes. Using the time temperature graph, at what temperature will the substance (not water) begin to boil?

• 10^oC

• 40^oC

• 80^oC

• 110^oC

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

This graph represents the relationship between temperature and time as heat was added uniformly to a substance, starting as a solid below its melting point. During the BC portion of the curve, the average kinetic energy of the molecules of the substance -

• Increase

• Decreases

• Stays the same

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

As water vapor condenses at 100^oC, the potential energy of the molecules -

• Decrease

• Increases

• Stays the Same

Tags

NGSS.MS-PS1-4

What occurs when a substance melts?

• It changes from solid to liquid, and the particles have more kinetic energy.

• It changes from solid to liquid, and the particles have less kinetic energy.

• It changes from liquid to solid, and the particles have more kinetic energy.

• It changes from liquid to solid, and the particles have less kinetic energy.

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-5

Select all of the line segments in which the average kinetic energy is increasing. (Choose 3)

• A to B

• B to C

• C to D

• D to E

• E to F

Tags

NGSS.MS-PS3-1

NGSS.MS-PS3-5

The graph represents the heating of water in a pot. At 150 seconds, the water has just reached a boil. If the heat is left on, what will happen to the temperature of water in the pot? (All temperatures in ^oC)

• The temperature will rise

• The temperature will fall

• The temperature will remain constant

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-5

Which of the following statements is most accurate? Choose 3

• When liquid water is heated, the molecules move faster.

• When liquid water is heated, the molecules collide more often.

• When liquid water is heated, collisions between molecules are more violent

• When liquid water is heated, the molecules move slower.

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

NGSS.MS-PS3-5

You begin pouring sodium chloride into a glass of water. For a long time, the sodium chloride just dissolves in the water, but suddenly it begins to pile up at the bottom of the glass. Which statement is true?

• The sodium chloride has increased the temperature of the water

• The sodium chloride has decreased the temperature of the water

• The water is unsaturated

• The water is saturated

Sarah found a substance she believes to be a solid. What characteristics should the substance possess if it is a solid? Choose 2

• Indefinite shape

• Particles are vibrating and

  close together

• Takes the shape of the

  container

• Particles flow over one another

• Definite shape

Tags

NGSS.MS-PS1-4