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Environmental Science(Regular) (Envi 201) Question Paper

Environmental Science(Regular) (Envi 201)

Course:Pure And Applied Sciences

Institution: Kenya Methodist University question papers

Exam Year:2011

TIME : 2 HOURS

INSTRUCTIONS:
In section A - Answer ALL the questions
In section B - Answer any TWO questions
SECTION A – 30 MARKS
Question One
(a) Briefly explain how did world views change as human interaction with the environment changed? (3 Marks)

(b) Explain three specific actions that the United States government took on the realization that their natural wilderness, species and resources were limited and not infinite as believed to be. (3 Marks)

(c) Explain how greenhouse gases contribute to global warming (4 Marks)

Question Two
(a) With reference to energy flow in our ecosystem, state three ways by which human beings can achieve a sustainable atmosphere. (3 Marks)

(b) Describe three consequences of wetland destruction. (3 Marks)

(c) Distinguish how the "consumptive uses" and "non-consumptive uses" of water affect water sources and state how each can be alleviated (4 marks)

Question Three
(a) Giving specific examples, explain how control of predators and pests has
caused extinction of wildlife in the world (3 marks)
Describe three effects of global warming on agriculture as witnessed in
Kenya recently (3 Marks)
State four long term problems associated with industrialized agriculture
(4 Marks)

SECTION B – 40 Marks
Question Four
(a) Discuss five human activities related to the rapidly growth of human
populations in world that are causing extinction of the Earth’s
biodiversity. (10 Marks)
(b) Explain five ways in which global climate change is impacting on human
health. (10 Marks)

Question Five
As result of environmental degradation due to increasing human activities, desertification is encroaching into the tropical and equatorial regions. Discuss the most likely consequences of this desert encroachment. (20 marks)

Question Six
Currently, shortage of fresh water is major environmental problem facing the world. As an environmentalist, with reference to Kenya, explain the major causes of this shortage of freshwater water.
(10 Marks)
What is food insecurity and explain the major causes of it? (10 Marks)

Environmental Science(Regular) (Envi 201) Question Paper

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