Properties Of Water Review: Question Preview (ID: 5237)


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Which statement best explains the reason some insects can walk across the surface of a lake?
a) Water is a polar molecule, and its adhesiveness causes good capillary action. b) Water is a non-polar molecule,and its cohesiveness 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 adhesiveness provides high surface tension.
Where is the majority of Earth’s freshwater located?
a) clouds b) Pacific Ocean c) polar ice caps d) rivers
Which type of substance can float in water?
a) A substance with high cohesion. b) A substance with low cohesion. c) A substance with a higher density than water. d) A substance with a lower density than water.
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) The water molecules never develops a charge and is always neutral. c) The water molecule has a negative charge at cold temperatures. d) Water molecules are rod shaped.
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) polarity b) adhesion c) cohesion d) solubility
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 high specific heat of water allows it to cool off very quickly. b) The high specific heat of water allows it to absorb a lot of heat before it increases in temperature c) The low specific heat of water allows it to absorb a lot of heat before it increases in temperature. d) The low specific heat of water allows it to cool off very quickly.
When water fills a submarine's floation tanks, the overall density of the submarine
a) stays the same. b) decreases. c) increases. d) reduces the buoyant force.
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) Cohesion causes the water molecules to be attracted to the wax paper. b) Cohesion causes the water molecules to be attracted to one another. c) Adhesion causes the water molecules to be attracted to one another. d) Adhesion causes the water molecules to be attracted to the wax paper.
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) 10°C b) 100°C c) 90°C d) 110°C
Approximately 70% of Earth's surface is covered with water. What percentage of this water is salt water contained in oceans?
a) 97% b) 77% c) 60% d) 3%
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