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AP Biology Properties of Water 1.1

Total questions: 22

Worksheet time: 14mins

Name
Class
Date
1.

Which type of chemical bond is formed when electrons are shared and is a stronger bond that is not easily broken?

a)

Ionic bond

b)

Covalent bond

c)

Hydrogen bond

d)

Van der Waals force

2.

Which type of water property explains water's ability to stick to other material.

a)

Cohesion

b)

Surface tension

c)

Adhesion

d)

High specific heat

3.

A material is hydrophobic, that means it...

a)

Doesn't mix with water or dissolve in water easily

b)

Mixes with water or dissolves in water easily

4.

Water is...

a)

Polar

b)

Nonpolar

5.
What makes a molecule polar?
a)
Equal sharing of valence electrons
b)
Unequal sharing of valence electrons
c)
Stealing of electrons
d)
Temporary charges that come and go
6.
Water molecules require a lot of energy to break the hydrogen bonds.  This gives water a high
a)
density
b)
polarity
c)
solvency
d)
specific heat
7.
Because water has a positively charged end and a negatively charged end, it can be described as
a)
amphipathic
b)
hydrophobic
c)
polar
d)
nonpolar
8.
Which of the following properties of water enables molecules to cling together as they move from the roots to the leaves of plants?
a)
Water expands as it freezes.
b)
Water is an excellent solvent.
c)
Water exhibits cohesive behavior.
d)
Water moderates temperature.
9.
Large bodies of water do not quickly fluctuate, or change, in temperature. Why?
a)
Water is a solvent.
b)
Water has a high heat capacity.
c)
Water acts as a buffer.
d)
Water is non-polar.
10.
Some insects can stand on the surface of calm water. Their feet push the surface of the water down slightly, but they do not break the surface. Why?
a)
The insects are light enough so they do not break the hydrogen bonds holding the water molecules together
b)
The insects actually use their wings to hover slightly above the water’s surface and they only skim it with their feet.
c)
The insect’s feet are non-polar, so they are repelled by the polar water molecules and are pushed away from the water’s surface.
d)
The insects are small enough to see the individual water molecules, so they are able to step carefully from one molecule to the next
11.
Why does water move from the roots to the leaves of plants?
a)
Water is pushed by solutes.
b)
Capillary action pulls the water molecules like a chain.
c)
Water is pulled by gravity.
d)
Water’s cohesion causes it to “pull” towards the leaves.
12.
Why does ice float?
a)
As water freezes, it expands and its density decreases.
b)
As water freezes, it takes up more hydrogen from the atmosphere, causing it to have a greater buoyancy.
c)
As water freezes, air becomes trapped between the hydrogen bonds of water molecules.
d)
As water freezes, it takes up more oxygen from the atmosphere, causing it to have a greater buoyancy.
13.
What property of water helps to moderate earth's temperature?
a)
adhesion
b)
chohesion
c)
Specific heat capacity
d)
Latent heat of vaporization
14.
Which of the following is correctly defined as the attraction of the hydrogen from one molecule to the oxygen of a different molecule?
a)
amphipathic
b)
hydrophobic
c)
hydrogen bonding
d)
adhesion
15.
The property of water that allows water molecules to stick to each other is
a)
adhesion
b)
cohesion
c)
density
d)
specific heat
16.
The property of water that allows water molecules to stick to another substance is
a)
adhesion
b)
cohesion
c)
density
d)
specific heat
17.
A florist places a bouquet of white carnations in water containing blue dye. After a time, the flowers turn blue. What process helped the carnations to change color?
a)
Specific heat 
b)
Surface tension
c)
Cohesion and adhesion of water molecules 
d)
Formation of covalent bonds between hydrogen and oxygen molecules
18.
 Many fish and aquatic plants can survive a cold winter because the layer of ice that forms at the top of the lake insulates the water below and prevents the lake from freezing solid. What unique property of water contributes to this effect? 
a)
Water absorbs heat when it evaporates and forms a gas 
b)
 Water expands and becomes less dense when it freezes.
c)
Water molecules completely separate into ions in solutions.
d)
 Water forms hydrogen bonds with ions and other polar substances. 
19.

Water is an excellent solvent. Select the property that justifies this statement.

a)

as a polar molecule, it can surround and dissolve ionic and polar molecules

b)

it forms ionic bonds with ions, hydrogen bonds with polar molecules, and hydrophobic interactions with non polar molecules

c)

it forms hydrogen bonds with itself so cohesion is possible

d)

it is liquid and will adhere to many substances

20.
Water has a much higher specific heat than most other covalent compounds. What do you predict might happen if water had a low specific heat instead?
a)
Flooding would occur and animals would be forced to migrate
b)
 Harmful organisms living in water would reproduce at a rapid rate
c)
Organisms that are sensitive to changes in temperature would die
d)
Plants would not have enough water to effectively carry out photosynthesis
21.
 Which of the following characteristics of water is not a result of hydrogen bonding?
a)
adhesive strength
b)
capillarity
c)
cohesive strength
d)
All of the above are a result of hydrogen bonding.
22.

Hydrophobic substances such as vegetable oil are

a)

nonpolar substances that repel water molecules.

b)

nonpolar substances that have an attraction for water molecules

c)

polar substances that repel water molecules

d)

ar substances that have an affinity for water.

e)

charged molecules that hydrogen-bond with water molecules.

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