Page 93 - CAPE Green Engineering Syllabus 2016.docx_Neat

-2- 02165020/CAPE/KMS 2015 SPEC

GREEN ENGINEERING
UNIT 1 - PAPER 02
KEY AND MARK SCHEME

Question 1.

S.O Suggested Response Mark Marks
Allocation KC AK PS

1:1:4 (a) Climate change is a long-term shift in 2 2
weather conditions measured by changes in
temperature, precipitation, wind, snow
cover, and other indicators. It can be
caused by natural processes (1), such as
changes in the output of the sun and in
the amount of volcanic dust in the
atmosphere. It can also be affected by
human activities (1).

1:1:4 (b) Carbon dioxide Any TWO 2
Methane
Nitrous oxide
Water vapour
CFCs

1:1:4 (c) The burning of fossil fuels - primarily 4 4
coal, oil, and natural gas - used for
transportation, manufacturing, heating,
electricity generation, and other
applications and which currently accounts
for human emissions of carbon dioxide -
a major greenhouse gas.

The remainder of the carbon dioxide
emissions comes from human land use
activities such as agricultural
activities especially animal husbandry,
poorly designed and managed landfill
sites and the clearing and degradation of
forests.

1:1:4 (d) 1. Coral bleaching (corals will expel 8 8
algae living in their tissues due to
warm temperatures; corals die and
become white/loss of algal
pigmentation).

2. Floods, storm surge, erosion and
other coastal hazards, exacerbated by
sea-level rise that threaten vital
infrastructure, settlements and
facilities that support the
livelihood of coastal communities.