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WorksheetsAP Biology Chemistry Review
Total questions: 20
Worksheet time: 13mins
Name
Class
Date
1.
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
2.
CO2 is an example of a(n) _____ bond.
a)
covalent
b)
adhesive
c)
ionic
d)
cohesive
3.
Covalently bonded molecules are made of atoms that
a)
share electorns
b)
shoot their electrons out into space
c)
move their electrons to the nucleus of the atom
d)
give electrons to and accept electrons from each other
4.
Ionically bonded compounds are made of atoms that
a)
share electrons
b)
shoot their electrons out into space
c)
move their electrons to the nucleus of the atom
d)
give electrons to and accept electrons from each other
5.
The compounds on the left side of a chemical equation are called the _____.
a)
Ingredients
b)
Reactants
c)
Total
d)
Products
6.
The compounds on the right side of a chemical equation are called the _____.
a)
Ingredients
b)
Reactants
c)
Total
d)
Products
7.
You dump a Kool-Aid packet into water. What substance is the solute?
a)
water
b)
Kool-Aid
8.
In an aqueous environment which of the following is the strongest bond?
a)
covalent
b)
ionic attraction in solution
c)
van der Waals
d)
hydrogen
9.
Why is Carbon so important to living things?
a)
It forms molecules easily
b)
It can form many shapes
c)
It is in most organic molecule
d)
All of these
10.
Which of the following is an organic compound?
a)
H2O
b)
C6H12O6
c)
NH2
d)
OH
11.
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
12.
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
13.
What property of water allows it to be such a versatile solvent that it is often called the "universal solvent?"
a)
Purity
b)
Polarity and cohesion
c)
High heat capacity
d)
Expansion upon freezing
14.
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.
15.
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.
16.
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
17.
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.
18.
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.
19.
What property of water helps to moderate earth's temperature?
a)
adhesion
b)
chohesion
c)
Specific heat capacity
d)
Latent heat of vaporization
20.
Pure water has a pH of
a)
6
b)
15
c)
3
d)
7
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