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Envi 201:Environmental Science 1St Trimester 2012 Question Paper

Envi 201:Environmental Science 1St Trimester 2012

Course: Environmental Science

Institution: Kenya Methodist University question papers

Exam Year:2012

ENVIRONMENTAL SCIENCE (ENVI 201) 1st trimester 2012
KENYA METHODIST UNIVERSITY

END OF 1'st 'TRIMESTER 2012 EXAMINATIONS

FACULTY : SCIENCE & TECHNOLOGY
DEPARTMENT : PURE & APPLIED SCIENCES
UNIT CODE : ENVI 201
UNIT TITLE : ENVIRONMENTAL SCIENCE
TIME : 2 HOURS

Instructions: Answer ALL questions in SECTION A and any TWO from SECTION B.

SECTION A: 30 MARKS

Answer ALL the Questions.

Question One

State any THREE chemical compounds that are primarily responsible for the thinning of the stratospheric ozone layer stating one major origin of each.
(3 Marks)

State THREE actions that local governments in urban areas could take to reduce outdoor air pollution.
(3 Marks)

Describe any FOUR main environmental problems of the global concern and state one main cause of each.
(4 Marks)
Question Two

With specific examples explain how introduction of exotic invasive species has caused extinction of wildlife species.
(3 Marks)
Describe how the carbon in an elephant’s body tissues is made available to the environment for use by other organisms.
(3 Marks)
Describe FOUR ways in which deforestation affect a watershed.
(4 Marks)

Question Three

Give THREE examples of green-house gases and state two major anthropogenic sources of each.
(3 Marks)
Describe how changes in polar ice would amplify or dampen global warming.
(3 Marks)

State FOUR reasons why human population increase is now a major concern in the world.
(4 Marks)
SECTION B: (40 MARKS)

Answer any TWO Questions.

Question Four

State the worldview associated with agricultural societies and then discuss THREE benefits and TWO consequences experienced as a result of their interaction with the natural environment.
(12 Marks)

Describe FOUR approaches through which we can regulate the commons and state the weaknesses of each.
(8 Marks)
Question Five

Explain FIVE practical ways how the municipal water demands can be reduced.
(10 Marks)

"Biological resources are essential to the human society". Explain the reality of this statement giving specific examples.
(10 Marks)
Question Six

Explain FIVE specific ways by which global warming may be mitigated.
(10 Marks)

Discuss any FIVE factors that have contributed to human population explosion in developing countries.
(10 Marks)

Envi 201:Environmental Science 1St Trimester 2012 Question Paper

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