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WorksheetsWater Unit
Total questions: 29
Worksheet time: 15mins
Name
Class
Date
1.
Which is not an example of surface tension
a)
athletic clothing that allows you to keep cool
b)
dropping paper clips into a full glass of water
c)
raindrops forming round beads when they fall on a car windshield
d)
an insect walking on water
2.
Anything that is added to a solution that weakens the hydrogen bonds, decreasing surface tension is known as a ________________.
a)
solution
b)
solute
c)
surfactant
d)
solvent
3.
Which of the following statements best describes a polar molecule?
a)
the even sharing of electrons
b)
the uneven sharing of electrons that creates a slightly positive and negative side
c)
has an overall positive charge
d)
has an overall negative charge
4.
The pH of water is
a)
7, it is a base
b)
7, it is an acid
c)
7, it is neutral
d)
0, it is neutral
5.
When you look in a mirror next to a warm shower and you see droplets of water stick to the surface of the glass. This is____________________.
a)
adhesion
b)
capillary action
c)
cohesion
d)
surface tension
6.
The tendency of water to move on its own up tubes through small spaces is called:
a)
adhesion
b)
cohesion
c)
capillary action
d)
surface tension
7.
Which two forces help you fit many water droplets on a penny?
a)
cohesion and surface tension
b)
capillary action and cohesion
c)
adhesion and surface tension
d)
capillary action and cohesion
8.
Why does water have a high cohesion?
a)
Water is a non-polar molecule and opposites attract
b)
Water is a polar molecule and opposites attract
c)
Water is a polar molecule and opposites repel
9.
Which state of water has molecules with the least movement?
a)
gas
b)
solid
c)
liquid
10.
When food coloring climbs up celery, changing its color, it is evidence of _________________.
a)
capillary action
b)
density
c)
condensation
11.
Ice floats on liquid water because...
a)
Ice is less dense due to tightly packed molecules
b)
Ice is more dense due to the large spaces between molecules
c)
Ice is less dense due to the large space between molecules
12.
Water is able to dissolve many substances and is commonly known as the _______________________.
a)
universal solute
b)
universal solvent
c)
universal compound
d)
universal element
13.
A _________________ is a type of a mixture where one substance dissolves into another.
a)
misciblity
b)
compound
c)
solution
d)
solubility
14.
The property of water, "Universal Solvent", is due to:
a)
A. Water is widely available
throughout the Universe.
throughout the Universe.
b)
B. Water dissolves more substances than any other solvent
c)
C. Water is a polar molecule.
d)
D. Both B and C
15.
What percentage of the Earth's water is fresh water?
a)
75%
b)
97%
c)
25%
d)
3%
16.
The only substance on Earth that commonly exists in all three states is ...
a)
salt
b)
oil
c)
sugar
d)
water
17.
What is the boiling point of water in degrees Celsius?
a)
100 degrees Celsius
b)
32 degrees Celsius
c)
212 degrees Celsius
d)
0 degrees Celsius
18.
When water is exposed to the sun, evaporation occurs, turning liquid into a ___________.
a)
solid
b)
gas
c)
liquid
19.
Water freezes at _______ degrees Celsius.
a)
212
b)
32
c)
0
d)
100
20.
Water that has a definite shape and a definit volume is called a ______________.
a)
gas
b)
liquid
c)
solid
21.
Substances such as soap or detergent are substances that __________________________.
a)
do not change anything about water
b)
increase the surface tension of water
c)
decrease the surface tension of water
d)
increase the density of water
22.
In a salt water solution, the salt is the _______________ in the mixture.
a)
solvent
b)
saltenator
c)
solution
d)
solute
23.
At which temperatures could water be found in a liquid state? (in Celsius)
a)
-15, 22, 57, 112, 125
b)
22, 125, 7, 112, -15
c)
22, 57, 7, 32, 89
24.
Which statement explains why water molecules stick together?
a)
both sides are positive
b)
both sides are negative
c)
one side has a negative charge and the other side has a neutral charge
d)
one side has a positive charge and the other side has a negative charge
25.
Phase change: from gas to a liquid
a)
condensation
b)
sublimation
c)
evaporation
26.
Phase change: solid to a gas
a)
freeze
b)
melt
c)
sublimation
d)
condensation
27.
Phase change: solid to a liquid
a)
melt
b)
freeze
c)
sublimation
d)
evaporation
28.
Phase change: liquid to a solid
a)
condenstion
b)
freeze
c)
melt
d)
evaporation
29.
Phase change: liquid to a gas
a)
condensation
b)
melt
c)
sublimation
d)
evaporation
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