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Worksheetswater_molecule of life_KMKt
Total questions: 25
Worksheet time: 32mins
Name
Class
Date
1.
What kind of bond results when one electron is "grabbed away" from one element to another? Example is NaCl.
a)
Ionic Bond
b)
Polar Bond
c)
Covalent Bond
d)
Polar Covalent Bond
2.
What is a water molecule composed of?
a)
1 Hydrogen atom and 2 Oxygen atoms
b)
2 Hydrogen atoms and 1 Oxygen atom
c)
3 Oxygen atoms
d)
2 Helium atoms and 1 Oxygen atom
3.
a water molecule is polar because
a)
it has a polar bond
b)
large electronegativity between O and H
c)
non symmetrical bent structure
d)
all of the answers
4.
What two elements make up water?
a)
Helium and oxygen
b)
Hydrogen and oxygen
c)
helium and carbon
d)
oxygen and carbon
5.
What word describes when water is attracted to other substances?
a)
cohesion
b)
adhesion
c)
capillary action
d)
surface tension
6.
Large bodies of water do not quickly fluctuate 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.
7.
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
8.
Which of the following properties of water enables it to 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.
A water strider can skate along the top of a pond because:
a)
covalent bonds result in water cohesion
b)
hydrogen bonds result in water cohesion (surface tension)
c)
water striders have adapted to take advantage of water cohesion
d)
low surface tension of water
10.
Attractions between water molecules are called
a)
Covalent bonds
b)
Ionic bonds
c)
Polar bonds
d)
Hydrogen bonds
11.
Why can water have no net charge but have slight charges in different parts of the molecule?
a)
The oxygen end is slightly negative and the hydrogen end is slightly positive
b)
The hydrogen end is slightly negative and the oxygen end is slightly positive
c)
The hydrogen and oxygen ends change in polarity
d)
Because it is hydrophobic
12.
Which is NOT a unique property of water?
a)
Frozen water floats on liquid water.
b)
Water covers most of the Earth’s surface and retains a large amount of heat.
c)
Water molecules stick to each other through hydrogen bonds.
d)
Water cools very rapidly.
13.
A molecule with electrically charged areas is called a _______________.
a)
magnet
b)
polar molecule
c)
solution
d)
electrical molecule
14.
Which end of the water molecule has a slightly positive charge?
a)
the oxygen end
b)
the hydrogen end
c)
both ends are slightly positive
d)
neither end is positive
15.
Water is a universal solvent because it...
a)
It can be found anywhere
b)
It freezes when it gets cold
c)
floats when frozen
d)
Dissolves most substances
16.
Which characteristic of water will allow a paperclip to remain floating on water when the paperclip is gently placed on top of the water?
a)
adhesion
b)
surface tension
c)
solvent properties
d)
nonpolar
17.
Which part(s) of a water molecule has/have a partial negative charge?
a)
the two hydrogen (H) atoms
b)
the two oxygen (O) atoms
c)
the one hydrogen (H) atom
d)
the one oxygen (O) atom
18.
Which types of compounds dissolve easily in water?
a)
Polar and Nonpolar
b)
Polar and Ionic
c)
Nonpolar and Ionic
d)
Covalent and Nonpolar
19.
Water is known as the universal solvent.
a)
True
b)
False
20.
A liquid that can dissolve a substance
a)
solvent
b)
solute
c)
solution
21.
A substance that dissolves into liquid
a)
solvent
b)
solute
c)
solution
22.
Water molecules are attracted to other water molecules
a)
cohesion
b)
adhesion
c)
surface tension
d)
capillary action
23.
Water molecules are attracted to other materials
a)
cohesion
b)
adhesion
c)
surface tension
d)
capillary action
24.
Cohesion of water molecules at the surface
a)
cohesion
b)
adhesion
c)
surface tension
d)
capillary action
25.
Having a slight negative charge on one side and a slight positive charge on the other side
a)
density
b)
cohesion
c)
polarity
d)
adhesion
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