Phase Changes and Heating Curves

Select 2 terms that represent PHASE CHANGES that can happen if a sample of matter absorbs thermal energy

• melting

• gas

• freezing

• liquid

• boiling

Tags

NGSS.MS-PS1-4

Select 3 terms that represent PHASE CHANGES that can happen if a sample of matter releases thermal energy

• condensing

• sublimation

• evaporation

• deposition

• freezing

Tags

NGSS.MS-PS1-4

On a heating or cooling curve, the substance is going through a phase change when the line is

• sloped (going up or down at an angle)

• horizontal (flat)

Tags

NGSS.MS-PS1-4

In which region(s) does temperature increase?

(a)  

• Region C only

• Regions B and D

• Regions A and B

• Regions A, C, and E

Tags

NGSS.MS-PS1-4

Use the following question to correct the answers in your packet.

g

f

e

d

c

b

a

Vaporization

Gas

Liquid

Solid

Melting

Freezing

Condensation

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

NGSS.MS-PS3-5

A student performs an experiment by adding heat to a beaker of ice and measuring the temperature at regular intervals. A graph of the resulting data is shown. Move the descriptions into the chart to correctly match the labels in the graph.

b

c

d

e

a

solid ice; temperature increasing

solid ice; melting

water vapor; temperature increasing

liquid water; boiling

liquid water; temperature increasing

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

In which region(s) does temperature increase? (a)  

• Region C only

• Regions B and D

• Regions A, C, and E

• Regions A and B

Tags

NGSS.MS-PS1-4

The following image shows the temperature change of a substance as thermal energy is released over time. Select all regions where the substance exists in a single phase of matter (NOT where a phase is changing)

• AB

• BC

• CD

• DE

• E to the end

Tags

NGSS.MS-PS1-4

The following image shows the temperature change of a substance as thermal energy is released over time. Select all regions where the phase is changing

• AB

• BC

• CD

• DE

• E to the end

Tags

NGSS.MS-PS1-4

Region QR represents a substance in the liquid phase. What does region RS represent?

• melting

• boiling

• solid

• gas

Tags

NGSS.MS-PS1-4