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Chapter 2 Review C
Test Description: Review for Chapter 2 Test
Instructions: Answer all questions to get your test result.
1) Which is an example of water condensing?
A
A puddle disappearing on a hot summer afternoon
B
Sweat forming on your forehead after you do a lot of exercise
C
Ice cubes melting when you put them out in the sun
D
Dew forming on plants during a cold night
2) If you breathe on a mirror, part of the mirror clouds up. What are you actually seeing when you see the mirror cloud up?
A
Cooled nitrogen in the air around you
B
Water droplets that formed from cooled water vapor in your breath
C
Oxygen that you are breathing out from your lungs
D
Carbon dioxide that you are breathing out from your lungs
3) When water vapor condenses:
A
One oxygen and two hydrogen atoms join to form a water molecule.
B
The water molecules spread further apart.
C
Water vapor changes from a liquid to a gas.
D
Water vapor changes from a gas to a liquid.
4) Cooling water vapor makes the water vapor condense faster because:
A
Water molecules slow down and attractions bring them closer together.
B
Cooling the vapor causes the molecules to move further apart.
C
Colder temperatures speeds up the molecules.
D
Water vapor is less dense than liquid water.
5) When water freezes, liquid water turns to solid ice mainly because:
A
The molecules move slowly enough that their attractions keep them in fixed positions.
B
The water molecules become harder and larger in size.
C
Ice can float on water.
D
All liquid water eventually becomes ice.
6) Different liquids have different freezing points mainly because:
A
Some winters are colder than others.
B
Molecules of different liquids have different amounts of attraction.
C
The less liquid you use, the faster it freezes.
D
Freezers are at different temperatures.
7) Molten (liquid) iron cooling and changing to solid iron is an example of:
A
evaporation
B
sublimation
C
condensation
D
freezing
8) If you compare solid ice and liquid water on the molecular level, you could say that:
A
The molecules in ice slide past each other.
B
The molecules in liquid water are smaller.
C
The molecules in liquid water are closer together.
D
The molecules in ice are closer together.
9) Dry ice changes to carbon dioxide gas in a warm water. Where does the heat transfer for this change to happen?
A
Heat transfers from the water to the dry ice.
B
Heat transfers from the dry ice to the water.
C
Cold transfers from the dry ice to the warm water.
D
Heat does not transfer during this phase change.
10) Chandler is boiling some water to kill the bacteria in it. Chandler notices that there are transparent bubbles forming in the water as she adds heat. The transparent bubbles are:
A
air and water vapor
B
carbon dioxide
C
water vapor
D
air
*select an answer for all questions
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