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BIOL 103 WATER MOLECULE QUIZ

BIOL 103 WATER MOLECULE QUIZ

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Water Molecule Quiz
Question 1
Points: 10 out of 10
Which of the following statements is true concerning hydrogen bonding and the liquid and solid states of water?
Both liquid and solid states of water form hydrogen bonds.
Only solid water forms hydrogen bonds.
Only liquid water forms hydrogen bonds.
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Correct.
Question 2
Points: 10 out of 10
You are able to fill a glass with water so that the water goes above the rim of the glass. What property of water have you observed?
cohesiveness
density
moderates temperature
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Correct. The water molecules are “sticky” and stay very close together so that you can fill the water above the rim of the glass.
Question 3
Points: 10 out of 10
Which of the following molecules is hydrophilic?
table salt
olive oil
butter
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Yes. Table salt dissolves in water, so it is hydrophilic.
Question 4
Points: 10 out of 10
Detergents are
nonpolar
polar
neither polar nor nonpolar
amphipathic
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Correct. Detergents must have both polar and non-polar regions, which means they are amphipathic.
Question 5
Points: 10 out of 10
Which characteristic of water protects fish when a lake freezes?
water is less dense as a solid
water as a solvent
cohesion
All of the these characteristics.
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Correct! The ice at the top of the lake helps protect the fish in the water below.
Question 6
Points: 10 out of 10
You make a cup of tea. What is the solute?
the tea leaves and water together
the tea leaves
the water
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Correct. The tea leaves are dissolved in the water.
Question 7
Points: 10 out of 10
Compare the liquid and solid states of water. Which statement is true?
Liquid water is more dense
Solid water is more dense
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Correct! Ice is less dense than liquid water.
Question 8
Points: 10 out of 10
Which of the following statements is true?
Non-polar molecules would move up trees in the same way water does.
Water moves up a tree in tubes. These tubes must be polar.
All of these are true
Water moves through a tree mainly using the force of gravity.
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Correct! Water will bind to the polar walls of these cells in a plant.
Question 9
Points: 10 out of 10
Polar molecules are hydrophilic.
True
False
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Correct, polar molecules dissolve in water.


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