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Greenhouse
gases (lesson 26)
Marjorie Henry, Contributor
Before
I give you a few multiple choice items
as promised, here are some more tips
on working through the items to arrive
at the correct answer.
- Do
make sure that you understand the
STEM before attempting an answer.
- Examine
the OPTIONS carefully and, at the
same time, quickly.
- Shade
the letter of that option you choose
for the correct answer, that is,
the key, on the given answer sheet.
As
I had indicated in the last lesson,
paper one has 60 items. The time allotted
for this paper is one and a half hours.
It therefore means that you have at
most, a minute and a half for each
question. If you can work through
most answers within a minute, you
will have some time at the end to
review your answers and make corrections
if necessary. Aim for this.
Your
multiple choice paper is a test of
skills, as related to map reading
and recall or knowledge. You must
prepare properly for it as you do
for the essay paper - Paper II. DO
NOT go 'lucky dipping' or guessing.
Here are some multiple choice items
I have constructed, all testing greenhouse
gases, a relatively new topic on the
syllabus.
1.
Which of the following is NOT a greenhouse
gas?
A)
Hydrofluorocarbons (HFCs)
B)
Methane
C)
Nitrous Oxide
D)
Oxygen
2.
The greenhouse gas that is mainly
used in the manufacture of refrigerators
is called:
A)
Hydrofluorocarbons (HFCs)
B)
Methane
C)
Nitrous Oxide
D)
Oxygen
3.
The greenhouse gas that is given off
by decomposing vegetable matter is
named:
A)
Hydrofluorocarbons (HFCs)
B)
Methane
C)
Nitrous Oxide
D)
Oxygen
4.
These greenhouse gases are used in
aerosol cans:
A)
(i) and (ii) only
B)
(i) and (iii) only
C)
(ii) and (iv) only
D)
(iii) and (iv) only
(i)
Hydrofluorocarbons (HFCs)
(ii)
Methane
(iii)
Nitrous Oxide
(iv)
Oxygen
5.
Perfluorocarbons (PFCs) are commonly
used in:
(i)
Aluminium production
(ii)
Manufacture of computer chips
(iii)
Fire extinguishers
(iv)
Electrical-equipment insulation
A)
(i); (ii) and (iii)
B)
(i); (ii) and (iv)
C)
(i); (iii) and (iv)
D)
(ii); (iii) and (iv)
6.
(i) Burning of fossil fuels (oil,
coal, natural gas)
(ii)
Flaring of natural gas
(iii)
Changes in land use deforestation
for agriculture
(iv)
Manufacture of cement
The
above are sources of which greenhouse
gas?
A)
Nitrous oxide
B)
Carbon monoxide
C)
Carbon dioxide
D)
Sulphur dioxide
7.
The greenhouse gas that traps about
25 times more heat than carbon dioxide
and could become the most significant
greenhouse gas is
A)
Nitrous oxide
B)
Perfluorocarbons (PFCs)
C)
Methane
D)
Chlorofluorocarbons (CFCs)
8.
The main gases that contribute to
acid rain are:
(i)
Nitrous oxide
(ii)
Carbon monoxide
(iii)
Carbon dioxide
(v)
Sulphur dioxide
A)
(i) and (ii)
B)
(ii) and (iii)
C)
(iii) and (iv)
D)
(i) and (iv)
9.
"It forms the largest proportion
of greenhouse gases in the atmosphere."
This
statement is TRUE about
A)
Carbon dioxide
B)
Methane
C)
Nitrous oxide
D)
Chlorofluorocarbons (CFCs)
10.
Motor-vehicle emissions provide a
source for:
A)
Nitrous oxide
B)
Carbon monoxide
C)
Carbon dioxide
D)
Sulphur dioxide
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Manning's
School sixth-formers pay keen
attention during a motivational
session initiated by the Westmoreland
Chapter of The Manning's School
Past Students' Association recently.
- Photo by Dalton Laing
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Marjorie
Henry is an independent contributor.
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