Changes of State

​ ​ (a)   is the total kinetic and potential energy of the particles in a substance.

​ ​ (b)   is a measure of the average kinetic energy of the particles in a substance.

• Thermal energy
• Temperature
• heat

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

NGSS.MS-PS3-5

What tool is used to measure the temperature of a substance?

• a thermometer

• a balance

• a scale

• a graduated cylinder

• a barometer

What happens when you heat a substance?

When you heat a substance, its thermal energy ​ (a)   and its particles ​ (b)   . As a result, its temperature ​ (c)   .

• increases
• move faster
• decreases
• slow down

Tags

NGSS.MS-PS1-4

Match each change of state to its description.

• Change from liquid to solid

• Melting

• Change in state from a gas to a liquid

• Condensation

• Change in state from a liquid to a gas

• Sublimation

• Change in state from solid to liquid

• Vaporization

• Change in state from a solid to a gas

• Freezing

Tags

NGSS.MS-PS1-4

At which temperature does water freezes?

• 0ºC

• 32ºC

• 100ºC

• 65ºC

Tags

NGSS.MS-PS1-4

two types of vaporization are ​boiling and​ (a)   ​.

​ (b)   takes place both below and at the surface of a liquid.

It occurs at ​​ (c)   .

​​ (d)   takes place ONLY on the surface of a liquid.

It occurs ​ (e)   .

• evaporation
• boiling
• a specific temperature
• at all temperatures
• sublimation

Tags

NGSS.MS-PS1-4

The reverse of vaporization is

• freezing

• condensation

• sublimation

• deposition

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

Match each change of state to its example.

• a pot of soup bubbling on the stove

• Condensation

• snow disappearing from the ground

• Boiling

• an ice cube is left out on the counter

• Sublimation

• a rain puddle disappearing from the ground

• Evaporation

• Clouds in the sky

• Melting

Tags

NGSS.MS-PS1-4

Freezing involves a(n) ​ (a)   of thermal energy as the molecule move ​ (b)   while melting involves a(n) ​ (c)   of thermal energy as the particles vibrate ​ (d)   .

• decrease
• more slowly
• increase
• faster

Tags

NGSS.MS-PS1-4

When does sublimation occur?

• when the particles gain thermal energy

• when the particles lose thermal energy

• when a gas changes into a solid

• I don't know!

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4