Focus On Physical Science: California Grade 8

Lesson 2: Changes in States of Matter

Standards Check

1.
__________ is the ability to cause change. 3.e
A)Momentum
B)Work
C)Power
D)Energy
2.
An example of a change of state is __________. 3.d
A)exposing photographic film
B)liquid filling a glass
C)ice cubes melting
D)paper burning
3.
The boiling point of water is __________. 3.e
A)195.8°C
B)100°C
C)357°C
D)0°C
4.
When a liquid changes to a gas, this is called __________. 3.e
A)vaporization
B)burning
C)condensing
D)melting
5.
Particles with more energy move __________ than particles with less energy. 3.e
A)faster and farther apart
B)faster and closer together.
C)slower and closer together
D)slower and farther apart
6.
__________ is the average kinetic energy of the individual particles of a substance. 3.e
A)Heat
B)Temperature
C)Energy
D)Matter
7.
A warmer substance has more __________ than a cooler one. 3.e
A)specific heat
B)temperature
C)matter
D)thermal energy
8.
What moves in or out of a substance during a change of state? 3.e
A)temperature
B)mass
C)matter
D)heat
9.
When a material is melting, the temperature __________. 3.e
A)decreases
B)fluctuates
C)remains the same
D)increases
10.
The melting point of a substance is __________ its freezing point. 3.e
A)greater than
B)the same as
C)less than
D)independent of
11.
Vaporization is different from evaporation because __________. 3.e
A)only vaporization involves a change of state
B)vaporization occurs at the surface
C)evaporation occurs in the liquid
D)evaporation occurs at the surface
12.
What is the term for the changing of a solid directly into a gas? 3.e
A)vaporization
B)condensation
C)evaporation
D)sublimation
13.
If the particles in an object begin to move more quickly, their average kinetic energy __________ and the object's temperature __________. 3.e
A)decreases, rises
B)increases, falls
C)increases, rises
D)decreases, falls
14.
The __________ of a substance is the temperature at which a solid begins to liquefy. 3.e
A)boiling point
B)melting point
C)heat of fusion
D)heat of vaporization
Grade 8
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