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Envi 201: Environmental Science Question Paper

Envi 201: Environmental Science

Course:Bachelor Of Education

Institution: Kenya Methodist University question papers

Exam Year:2015

ENVIRONMENTAL SCIENCES (b) (ENVI 201 ) 2nd trimester 2015
KENYA METHODIST UNIVERSITY

END OF 2ND TRIMESTER 2015 (PT) EXAMINATION

FACULTY : EDUCATION, ARTS AND SCIENCES
DEPARTMENT : PURE AND APPLIED SCIENCES
UNIT CODE : ENVI 201
UNIT TITLE : ENVIRONMENTAL SCIENCE
TIME : 2 HOURS

SECTION A: 30 MARKS

Answer all questions in this section
Question One

Explain the difference between the following;
Ecology and ecosystem
(2 Marks)
Population ecology and carrying capacity
(2 Marks)
State two effects of destruction of stratospheric ozone layer to human health.
(2 Marks)
Explain four major reasons why the current sources of energy are unsustainable.
(4 Marks)
Question Two

Explain four ways which are effective in regulating the global commons.
(4 Marks)
Explain four ways of controlling soil erosion.
(4 Marks)
Highlight two ways in which human has destroyed biosphere.
(2 Marks)
Question Three

Explain four ways of increasing water supplies locally.
(4 Marks)
State four sinks of carbon on planet earth.
(4 marks)
Explain two effects of human overpopulation in Kenya.
(2 Marks)
SECTION B: 40 MARKS

Answer any two questions from this section

Question Four (20 marks)

Explain how temperature inversion occurs.
(6 Marks)
Explain the following models of population growth;
(4 Marks)
Exponential population growth
The logistic population growth
Discuss the factors that have led to food insecurity.
(10 marks)
Question Five (20 marks)

Discuss the structure of ecosystems under the following;
Biotic structure
(6 Marks)
Abiotic structure
(4 marks)
Explain five ways in which man has contributed to extinction of wildlife.
(10 marks)
Question Six (20 marks)

Explain greenhouse effect.
(10 marks)
Kenya today is faced with acute water shortage, as an expert what are the major causes of this water shortage?
(3 Marks)
Discuss effects of change of precipitation patters.
(7 marks)
Categories: ENVIRONMENTAL SCIENCES | (ENVI 201 ) | 2nd trimester 2015
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Envi 201: Environmental Science Question Paper

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