WorksheetsPhasesOfMatterPracticeTest_25-26
Total questions: 18
Worksheet time: 9mins
Name
Class
Date
1.
What phase change occurs when a substance turns from a liquid to solid?
a)
a.) condensing
b)
b.) evaporating
c)
c.) freezing
d)
d.) melting
2.
Which is NOT a characteristic property?
a)
a.) mass
b)
b.) freezing point
c)
c.) boiling point
d)
d.) density
3.
What phase change happens when a substance turns from a solid to a liquid?
a)
a.) condensing
b)
b.) evaporating
c)
d.) melting
4.
What is endothermic?
a)
A reaction or process accompanied by release of heat.
b)
A reaction or process accompanied by absorption of heat
c)
A process of changing colors
d)
A process of forming crystals
5.
When heat passes through a substance easily (like some metals) it is referred to as...
a)
an insulator
b)
a conductor
c)
a passthrough
6.
What is exothermic?
a)
A reaction or process accompanied by release of heat.
b)
A reaction or process accompanied by absorption of heat
c)
A process of changing colors
d)
A process of forming crystals
7.
______ is useful in identifying unknown substances
a)
Mass
b)
Volume
c)
Characteristic Properties
8.
What phase change happens (occurs) when a substance turns from a liquid to a gas?
a)
a.) condensing
b)
b.) evaporating
c)
c.) freezing
d)
d.) melting
9.
The reason you can see your breath in the winter is because as you breathe out the atoms cool down and…
a)
a.) become more dense, and melt into a liquid
b)
b.) become more dense, and condense into a liquid
c)
c.) become less dense and freeze into a gas.
10.
Conduction is:
a)
A. Transfer of heat energy through direct contact
b)
B. Transfer of heat through waves in air or a vacuum
c)
C. Transfer of heat through currents of rising and falling air or fluids
11.
What part of a cooling or heating curve indicates a phase change?
a)
a.) the steepest part of the graph (greatest slope)
b)
b.) the plateau (flat part)
c)
c.) the highest temperature
d)
d.) the lowest temperature
12.
What phase change occurs when a substance turns from a gas to a liquid?
a)
a.) condensing
b)
b.) evaporating
c)
c.) freezing
d)
d.) melting
13.
Radiation is:
a)
A. Transfer of heat energy through direct contact
b)
B. Transfer of heat through waves in air or a vacuum
c)
C. Transfer of heat through currents of rising and falling air or fluids
14.
How does adding salt (NaCl) to water affect the density and boiling point of water?
a)
Adding salt causes the density to increase and boiling point to decrease.
b)
Adding salt causes the density to increase and the boiling point to increase.
c)
Adding salt causes the density to decrease and the boiling point to decrease.
d)
Adding salt causes the density to decrease and the boiling point to remain the same.
e)
Adding salt does not affect the density or boiling point of water.
15.
Which statement below is true?
a)
a.) In gases the atoms are spread apart the most.
b)
b.) In liquids the atoms are packed closer compared to gases.
c)
c.) In solids the atoms are packed the closest together.
d)
d.) All the above statements are correct.
e)
e.) All the above statements are wrong.
16.
Convection is:
a)
A. Transfer of heat energy through direct contact
b)
B. Transfer of heat through waves in air or a vacuum
c)
C. Transfer of heat through currents of rising and falling air or fluids
17.
If a puddle of water on a sidewalk gets smaller in the heat of the sun it is most likely because…
a)
Option 1
b)
a.) some particles of water have lost energy and become a solid
c)
b.) some particles of water have lost energy and become a gas
d)
c.) some particles of water have gained energy and become a solid
e)
d.) some particles of water have gained energy and become a gas
18.
When heat is not able to pass through, we call this substance:
a)
blocker
b)
insulator
c)
conductor
100 %
