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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
Sweat forming on your forehead after you do a lot of exercise
B
Ice cubes melting when you put them out in the sun
C
A puddle disappearing on a hot summer afternoon
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
Oxygen that you are breathing out from your lungs
B
Water droplets that formed from cooled water vapor in your breath
C
Cooled nitrogen in the air around you
D
Carbon dioxide that you are breathing out from your lungs
3) When water vapor condenses:
A
Water vapor changes from a liquid to a gas.
B
One oxygen and two hydrogen atoms join to form a water molecule.
C
Water vapor changes from a gas to a liquid.
D
The water molecules spread further apart.
4) Cooling water vapor makes the water vapor condense faster because:
A
Cooling the vapor causes the molecules to move further apart.
B
Water vapor is less dense than liquid water.
C
Water molecules slow down and attractions bring them closer together.
D
Colder temperatures speeds up the molecules.
5) When water freezes, liquid water turns to solid ice mainly because:
A
The water molecules become harder and larger in size.
B
All liquid water eventually becomes ice.
C
Ice can float on water.
D
The molecules move slowly enough that their attractions keep them in fixed positions.
6) Different liquids have different freezing points mainly because:
A
Molecules of different liquids have different amounts of attraction.
B
The less liquid you use, the faster it freezes.
C
Some winters are colder than others.
D
Freezers are at different temperatures.
7) Molten (liquid) iron cooling and changing to solid iron is an example of:
A
freezing
B
evaporation
C
condensation
D
sublimation
8) If you compare solid ice and liquid water on the molecular level, you could say that:
A
The molecules in ice are closer together.
B
The molecules in liquid water are closer together.
C
The molecules in liquid water are smaller.
D
The molecules in ice slide past each other.
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 dry ice to the water.
B
Heat does not transfer during this phase change.
C
Cold transfers from the dry ice to the warm water.
D
Heat transfers from the water to the dry ice.
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
water vapor
B
air and water vapor
C
carbon dioxide
D
air
*select an answer for all questions
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