Phase Change and Heating Curve Diagrams 2021

Between which points is the temperature of the substance increasing?

• A-B only. 
• A-B, C-D, E-F
• B-C only. 
• B-C, D-E

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

Between which points is the substance changing state?

• A-B only. 
• A-B, C-D, E-F
• B-C only. 
• B-C, D-E

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

Melting and freezing occur at the same temperature! True or false

• True

• False

A substance's heating curve is shown in the graph.  What is its boiling point?

• 100 C
• 60 C
• 80 C
• 20 C

Tags

NGSS.MS-PS1-4

What state(s) of matter are present at D-E?

• Solid-liquid
• Liquid
• Liquid-gas
• Gas-Solid

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

What line segment represents only the solid state?

• A-B
• B-C
• C-D
• D-E

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

The melting point of the sample is

• -60 ºC

• -100 ºC

• 60 ºC

• 100 ºC

If you add kinetic energy to a substance are you increasing or decreasing the freedom of movement of the molecules?

• increasing

• decreasing

Cohen had a popsicle but left it out and it started to melt. What caused the Popsicle to melt?

• kinetic energy was taken away from the Popsicle

• kinetic energy was added to the Popsicle

• Cohen doesn't deserve treats if he is going to waste them

The molecules in the bottom of this picture are in what phase?

• solid

• liquid

• gas

• plasma