WorksheetsChanges of State
Total questions: 10
Worksheet time: 12mins
(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.
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) .
Match each change of state to its description.
Melting
Change in state from solid to liquid
Freezing
Change from liquid to solid
Vaporization
Change in state from a liquid to a gas
Condensation
Change in state from a gas to a liquid
Sublimation
Change in state from a solid to a gas
At which temperature does water freezes?
0ºC
32ºC
100ºC
65ºC
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) .
The reverse of vaporization is
freezing
condensation
sublimation
deposition
Match each change of state to its example.
Boiling
a pot of soup bubbling on the stove
Melting
an ice cube is left out on the counter
Evaporation
a rain puddle disappearing from the ground
Sublimation
snow disappearing from the ground
Condensation
Clouds in the sky
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) .
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!
