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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
Dew forming on plants during a cold night
C
Sweat forming on your forehead after you do a lot of exercise
D
Ice cubes melting when you put them out in the sun
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
Carbon dioxide that you are breathing out from your lungs
B
Water droplets that formed from cooled water vapor in your breath
C
Oxygen that you are breathing out from your lungs
D
Cooled nitrogen in the air around you
3) When water vapor condenses:
A
One oxygen and two hydrogen atoms join to form a water molecule.
B
Water vapor changes from a gas to a liquid.
C
The water molecules spread further apart.
D
Water vapor changes from a liquid to a gas.
4) Cooling water vapor makes the water vapor condense faster because:
A
Water molecules slow down and attractions bring them closer together.
B
Colder temperatures speeds up the molecules.
C
Water vapor is less dense than liquid water.
D
Cooling the vapor causes the molecules to move further apart.
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
Freezers are at different temperatures.
D
The less liquid you use, the faster it freezes.
7) Molten (liquid) iron cooling and changing to solid iron is an example of:
A
condensation
B
evaporation
C
freezing
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 ice slide past each other.
C
The molecules in liquid water are closer together.
D
The molecules in liquid water are smaller.
9) Dry ice changes to carbon dioxide gas in a warm water. Where does the heat transfer for this change to happen?
A
Heat does not transfer during this phase change.
B
Cold transfers from the dry ice to the warm water.
C
Heat transfers from the water to the dry ice.
D
Heat transfers from the dry ice to the water.
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
carbon dioxide
B
air and water vapor
C
water vapor
D
air
*select an answer for all questions
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