2.1 Review CC Question Preview (ID: 43488)
Water And Its Properties.
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Which of the following statements about water correctly explains why most of Earth's surface is covered by oceans?
a) Life on Earth depends on water.
b) Liquid water takes the shape of its container.
c) Water remains liquid at most temperatures on Earth.
d) Water can exist on Earth's surface as a solid, liquid, or gas.
Water molecules are polar molecules. What is meant by the term polar molecule?
a) a molecule that has no charge on one end and either an overall negative or positive charge on the other end
b) a molecule that has an overall positive charge on one end and an overall negative charge on the other end
c) a molecule that has an overall positive charge on one end, as well as an overall positive charge on the other end
d) a molecule that has an overall negative charge on one end, as well as an overall negative charge on the other end
Which property of water allows it to form droplets when in liquid form?
a) adhesion
b) nature as a solvent
c) specific heat
d) cohesion
What percentage of water on Earth is fresh water?
a) 3
b) 0.5
c) 7
d) 18
How does the property of cohesion affect the way liquid water behaves?
a) When water freezes, it becomes less dense.
b) Water forms droplets whenever possible.
c) Water retains heat longer than other substances do.
d) When water vaporizes, it stores more energy than liquid water stores.
What percentage of water on Earth is salt water?
a) 55
b) 71
c) 97
d) 84
Which statement correctly describes a difference between gaseous and liquid water?
a) Only liquid water takes the shape of its container.
b) Only water vapor takes the shape of its container.
c) Only liquid water expands to fill the available space.
d) Only water vapor expands to fill the available space.
What explains why water has high cohesion?
a) Water molecules are repelled from other water molecules.
b) Water molecules are attracted to other water molecules.
c) Water molecules are attracted to molecules of other substances.
d) Water molecules are repelled from molecules of other substances.
Why does solid water (ice) float when placed in liquid water?
a) Ice does not float in liquid water.
b) Ice is less dense than liquid water.
c) Ice is more dense than liquid water.
d) The densities of liquid water and ice are the same.
The polarity of water molecules causes the negatively charged atom of one water molecule to be attracted to the positively charged atoms of another. What is this attraction called?
a) attraction
b) infusion
c) adhesion
d) cohesion
Which of the following correctly explains why icebergs float in the ocean?
a) Ice is less dense than liquid water because there is more open space between molecules in ice than in liquid water.
b) Ice is less dense than liquid water because water contracts when it freezes, filling in open space between molecules.
c) Ice is more dense than liquid water because there is less open space between molecules in ice than in water.
d) Water is a polar, so the positive charges in the water repel the positive charges inside the iceberg.
Why is water considered the universal solvent?
a) Because all water molecules have a negative charge, so they repel each other.
b) Because water will not dissolve many substances.
c) Because water can dissolve many substances.
d) Because water molecules will not stick to any other water molecules.
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