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WorksheetsWater
Total questions: 24
Worksheet time: 30mins
Name
Class
Date
1.
Water, with nothing dissolved in it, will freeze at what temperature?
a)
0° C
b)
32° C
c)
100 ° C
d)
115 ° C
2.
A student took out a cup of frozen water from the freezer. At what temperature would the water begin changing from a solid to a liquid?
a)
0° C
b)
50° C
c)
100° C
d)
150° C
3.
A container of water in the liquid state is heated to 100° C. At this temperature the water will-
a)
freeze
b)
boil
c)
melt
d)
condense
4.
a)
boiling point
b)
0° C
c)
freezing/melting point
d)
100° C
5.
What is water?
a)
An atom
b)
A molecule composed of 2 parts Oxygen and one part Hydrogen
c)
A molecular compound composed of 2 parts Hydrogen and one part Oxygen
d)
A pure substance composed of 2 parts Hydrogen and one part Oxygen
6.
What is the chemical formula for water?
a)
H20
b)
h2o
c)
H2O2
d)
H2O
7.
What is adhesion?
a)
Water's ability to stick to itself
b)
Water's ability to stick to other substances
c)
The strength of the cohesion of all the water molecules combined
d)
Tape, glue and other adhesives
8.
What is cohesion?
a)
Water's ability to stick to itself
b)
Water's ability to stick to other substances
c)
The strength of the cohesion of all the water molecules combined
d)
Tape, glue and other adhesives
9.
Water is essential for life. Its special properties make water the single most important molecule in plant life. 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 is able to moderate temperature.
10.
Large bodies of water, such as lakes and oceans, do not quickly fluctuate in temperature. What is the reason for this phenomenon?
a)
Water is an acid.
b)
Water is a versatile solvent.
c)
Water has a high heat capacity.
d)
Water acts as a buffer.
11.
Small insects can walk across the surface of calm water. Their feet push the surface of the water down slightly, somewhat like a person walking across a trampoline, but they do not break the surface. What is the best explanation for why this happens?
a)
The insects are light enough so that 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 insects' 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
12.
Water makes up approximately 60% of the human body and plays a vital role in regulating body temperature. Which property of water makes it good at regulating temperature?
a)
Water is a good solvent.
b)
Water exhibits strong cohesion.
c)
. Water has an unusual crystalline structure.
d)
Water has a high capacity for heat.
13.
What two elements make up water?
a)
Helium and oxygen
b)
Hydrogen and oxygen
c)
helium and carbon
d)
oxygen and carbon
14.
What word describes when water is attracted to other substances?
a)
cohesion
b)
adhesion
c)
capillary action
d)
surface tension
15.
Attractions between the negative Oxygen atom of one water molecule and the positive Hydrogen atom of another water molecule are called
a)
Covalent bonds
b)
Ionic bonds
c)
Polar bonds
d)
Hydrogen bonds
16.
A(n) ______ is a substance with a pH less than 7
a)
Acid
b)
Alkaline
c)
Base
d)
Buffer
17.
A(n) _______ is a substance with a pH greater than 7.
a)
Base
b)
Acid
c)
Buffer
d)
Water
18.
What is the only substance with a neutral pH of 7?
a)
Milk
b)
Orange Juice
c)
Water
d)
Blood
19.
Neutral solutions have a pH of:
a)
0
b)
1
c)
7
d)
14
20.
Which is true?
a)
pH of less than 7 is basic; pH of more than 7 is acidic
b)
pH of less than 7 is acidic; pH of more than 7 is basic
21.
Is pure water acidic, basic, or neutral?
a)
Acidic
b)
Basic
c)
Neutral
22.
Vinegar is an example of:
a)
An acid.
b)
A base.
c)
Neither an acid nor a base.
23.
pH is the measure of the concentration of ______.
a)
Acids
b)
H+ ion
c)
OH- ion
d)
Bases
24.
If a solution is basic which ion will be more present?
a)
H+
b)
K+
c)
OH-
d)
H-
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