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Molecular Motion 1
Test Description: Practice test questions for the multiple choice section of a summative assessment over NGSS 06-PS1-4.
Instructions: Answer all questions to get your test result.
1) The solid state of matter is unique because all molecular motion stops.
A
False
B
True
2) Liquids
A
have a defined shape but undefined volume
B
have an undefined shape but defined volume
C
have a defined shape and volume
D
have both undefined shape and volume
3) Gases can be compressed because...
A
molecules of gas can be compressed
B
molecules of a gas are spread out and can be squeezed together
C
gases do not contain molecules
D
gases are not made of matter
4) Why does temperature remain constant during a phase transition?
A
because the energy gained or lost is all used by molecules transitioning from one phase to another
B
because frozen substances always keep their surroundings cold
C
because Albert Einstein predicted it
D
because no energy is exchanged in the process
5) Food coloring spreads out faster in hot water than in cold water. This is mainly because...
A
hot water is less dense
B
the food coloring molecules are small
C
the water molecules in hot water move more quickly
D
the molecules in hot water are larger
6) When a thermometer is heated, the red liquid inside the thermometer moves up. This is mainly because...
A
the red liquid is thin.
B
the molecules of the liquid move faster and get a little further apart.
C
hot liquid is lighter.
D
the glass of the thermometer is hot.
7) When heat energy is removed from a substance...
A
the molecules of a substance stop moving.
B
a phase change occurs.
C
the molecules slow down and move closer together.
D
the molecules of that substance become more active and move further apart.
8) If you heat an iron bar, it will get longer because...
A
the molecules begin to move faster and spread out.
B
the moleucles melt and spread out.
C
it will get lighter because it has more air between the molecules.
D
the molecules start to slide past each other.
9) Matter is made up of motionless particles.
A
True
B
False
10) The temperature at which a liquid becomes a gas is the ____ point.
A
condensation
B
boiling
C
freezing
D
melting
*select an answer for all questions
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