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Properties Of Water Review
Test Description: Review of the key properties of water.
Instructions: Answer all questions to get your test result.
1) Which statement best explains the reason some insects can walk across the surface of a lake?
A
Water is a non-polar molecule, and its adhesiveness provides high surface tension.
B
Water is a polar molecule, and its adhesiveness causes good capillary action.
C
Water is a polar molecule, and its cohesiveness causes high surface tension.
D
Water is a non-polar molecule,and its cohesiveness causes good capillary action.
2) Where is the majority of Earth’s freshwater located?
A
Pacific Ocean
B
clouds
C
polar ice caps
D
rivers
3) Which type of substance can float in water?
A
A substance with a higher density than water.
B
A substance with a lower density than water.
C
A substance with high cohesion.
D
A substance with low cohesion.
4) What do scientists mean when they say that water is a polar molecule?
A
Water molecules have a positive charge on one end and a negative charge on the other.
B
Water molecules are rod shaped.
C
The water molecules never develops a charge and is always neutral.
D
The water molecule has a negative charge at cold temperatures.
5) Which property of water best explains why the surface of the water is pulled up the sides of a graduated cylinder to create a meniscus(a curve in the water)?
A
adhesion
B
polarity
C
solubility
D
cohesion
6) Water circulating through pipes is often used to cool engines that produce large amounts of heat. Why is circulating water an effective method of cooling?
A
The low specific heat of water allows it to cool off very quickly.
B
The low specific heat of water allows it to absorb a lot of heat before it increases in temperature.
C
The high specific heat of water allows it to cool off very quickly.
D
The high specific heat of water allows it to absorb a lot of heat before it increases in temperature
7) When water fills a submarine's floation tanks, the overall density of the submarine
A
increases.
B
decreases.
C
stays the same.
D
reduces the buoyant force.
8) If you pour water on to a sheet of wax paper, the water forms drops that are flat on the bottom and round on top. Why does the water arrange itself in this shape?
A
Adhesion causes the water molecules to be attracted to one another.
B
Cohesion causes the water molecules to be attracted to one another.
C
Cohesion causes the water molecules to be attracted to the wax paper.
D
Adhesion causes the water molecules to be attracted to the wax paper.
9) A beaker with 100 mL of water is placed on a hot plate and heated. The water boils at 100°C. At what temperature would 90 mL of water boil?
A
110°C
B
100°C
C
90°C
D
10°C
10) Approximately 70% of Earth's surface is covered with water. What percentage of this water is salt water contained in oceans?
A
3%
B
60%
C
77%
D
97%
*select an answer for all questions
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