Changes in Matter — Unit test Answers
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The diagram below shows the different phase transitions that occur in matter.Which best describes the process that arrow 1 represents?
A
Molecules are speeding up during boiling.B
Molecules are depositing as ice on a surface.C
Molecules are slowing down during condensing.D
Molecules are moving from stationary positions.2
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Which statement describes an extensive property of matter?
A
It changes with the color of a substance.B
It changes when a new substance is formed.C
It changes with the amount of sample that is present.D
It changes with the composition of a substance.3
Which commercial technology commonly uses plasmas?
A
a radioB
a race carC
a fluorescent lightD
a microwave oven4
Consider the temperature versus time graph below.At what temperature is the substance a heated gas?
A
at 100°CB
below 0°CC
above 100°CD
between 0°C and 100°C5
A gaseous substance turns directly into a solid. Which term describes this change?
A
depositionB
evaporationC
meltingD
sublimation6
Which statement describes a chemical property of water?
A
It reacts with sodium metal.B
It has a melting point of 0°C.C
It has a density of about 1 g/mL.D
It is clear and colorless.7
Why do amorphous solids not have a long-range order in the arrangement of their particles?
A
Their formation involves very rapid cooling.B
They do not have enough particles.C
Their particles eventually change positions.D
Their particles always stay in the same positions.Did you find these answers helpful?
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