AKS 5a/7f States of Matter & Heating/Cooling Curves

Label the diagram with the correct phase changes

c

a

b

d

e

Freezing

Sublimation

Vaporization

Melting

Condensation

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

What happens as a solid reaches the melting point?

• Temperature stops increasing, and energy goes to breaking the attractive forces between particles

• Energy is removed from the solid and decreases the speed of the particles, and temperature will decrease

• it changes from gas to liquid, and particles lose thermal energy

• Thermal Energy goes to into increasing the speed of the particles, and the temperature increases

Tags

NGSS.MS-PS1-4

Choose the best answer.

Temperature is....

• The amount of thermal energy a substance has

• The average Kinetic Energy (movement) of particles in a substance

• The amount of cold particles a substance has

• The amount of space something takes up

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

What is true during vaporization? (Choose all correct)

• Temperature stays the same

• Liquid changes into gas

• Gas changes to liquid

• Temperature increases

Tags

NGSS.MS-PS1-4

What is the term used to describe the temperature at which a solid turns into a liquid?

• Boiling point

• Freezing point

• Melting point

• Condensation point

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

The melting point of the sample is

• -60 ºC

• 20 ºC

• 60 ºC

• 100 ºC

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

You are doing a peer review of a science experiment. The paper claims that an increase of pressure requires a greater addition of thermal energy to change a liquid to a gas. Why is this true?

• Because the particles in the gas phase are colliding with the surface of the liquid more frequently and exerting greater forces on the particles in the liquid, which limits the movement of particles from the liquid to gas phase

• Because the particles in the gas phase are colliding with the surface of the liquid less frequently and exerting greater forces on the particles in the liquid, which limits the movement of particles from the liquid to gas phase

• Because the particles in the gas phase are colliding with the surface of the liquid more frequently and exerting less force on the particles in the liquid, which limits the movement of particles from the liquid to gas phase

• Because the particles in the gas phase are colliding with the surface of the liquid less frequently and exerting less force on the particles in the liquid, which limits the movement of particles from the liquid to gas phase

Tags

NGSS.MS-PS1-4

What is the term used to describe the temperature at which a solid turns into a liquid?

• Boiling point

• Freezing point

• Melting point

• Condensation point

Tags

NGSS.MS-PS1-4

Label the diagram with the appropriate word to describe changing the state of matter.

c

d

e

f

b

a

melting

condensation

deposition

freezing

sublimation

evaporation

Tags

NGSS.MS-PS1-4

Match the following Phase Changes

• Solid to Gas

• Sublimation

• Liquid to Solid

• Deposition

• Gas to Solid

• Condensation

• Solid to Liquid

• Melting

• Gas to Liquid

• Freezing

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4