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WorksheetsChapter 4 Review
Total questions: 15
Worksheet time: 8mins
What happens to water particles as liquid water evaporates?
They move closer together.
They move farther apart.
Their mass decreases.
Their mass increases.
Each of these objects is traveling at the same speed. Which has the most kinetic energy?
When water changes from a liquid to a gas and then the steam condenses back to the liquid form, these types of changes are
physical
chemical
mechanical
electrical
Every 60 seconds, a thermometer recorded the temperature of ice cubes inside a beaker being warmed. The ice began to melt but the temperature remained the same. Eventually the temperature began to rise again. Why did this happen?
The liquid particles began to slow down as heat was applied, and randomly sped up to raise the temperature.
The ice particles began to slow down as heat was applied, and randomly sped up to raise the temperature.
Some of the ice cubes rose to the top of the melted ice, blocking a temperature change.
The temperature did not rise until all of the particles were in the liquid phase.
Which phase change causes an increase in the motion of atoms?
liquid to solid
gas to liquid
liquid to gas
The energy stored in an object is known as...
chemical energy
mechanical energy
kinetic energy
potential energy
Which factor is most important for determining the phase in which a substance exists?
its mass
its density
its temperature
its volume
What has occurred when bubbles form in a liquid that is being heated?
Oxygen has been absorbed from air.
Heat has radiated through the liquid.
Boiling point has been reached.
Molecular stability has increased.
The teacher heats a pot of water. Once the water reaches 100°C, which point has the water reached?
boiling
melting
freezing
evaporating
Students took some ice cubes out of the freezer at 1:00 p.m. An hour later, they observed how the ice cubes had changed.
The change is BEST described as
chemical because a liquid formed.
physical because it happened over time.
physical because no new substance was formed.
chemical because heat caused the change.
At what temperature does water boil?
212°F
100°C
373 K
all of the above
none of the above
The image below shows four flasks of water at different temperatures. Which flask contains a liquid with the lowest average particle speed?
W
X
Y
Z
An 80-g sample of water is cooled from 15°C to –5°C. What will happen to the molecules in the sample?
They will slow down, and melting will occur.
They will slow down, and freezing will occur.
They will speed up, and evaporation will occur.
They will speed up, and condensation will occur.
A helium balloon is taken outside on a very cold day. The balloon wrinkles and becomes a little smaller, but returns to its normal size when it is taken back inside the warm house. Why does the balloon inflate when it reenters the warm house?
The warmer temperature causes the gas in the balloon to expand.
The warmer temperature causes the gas in the balloon to contract.
The warmer temperature causes the gas in the balloon to turn into a solid.
The warmer temperature causes more gas to enter the balloon, and it expands.
The diagram below compares the movement of water particles when the water is cold compared to when it is hot.
The particles in the cold water move more slowly.
The particles in the cold water move more quickly.
The particles in the cold water move more freely.
The particles in the cold water do not move at all.
