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Environmental Science (Envi 201) Question Paper

Environmental Science (Envi 201)

Course:Environmental Science

Institution: Kenya Methodist University question papers

Exam Year:2013

TIME : 2 Hours

Instructions: Answer ALL the Questions.
Questions One
Human activities are increasing the amount of carbon dioxide in the atmosphere two-fold.
State the two ways.
(2 Marks)
State TWO measures to curb the increase of carbon dioxide levels in the atmosphere.
(2 Marks)

Give THREE examples of greenhouse gases and state two major anthropogenic sources of each.
(3 Marks)

Describe THREE consequences of overdrawing of both surface and underground water.
(3 Marks)

Question Two
Describe FOUR human activities related to the rapidly growing world populations that are having an impact on Earth’s diversity.
(4 Marks)
With specific examples explain how introduction of exotic invasive species has caused extinction of wildlife species.
(3 Marks)

Describe THREE negative impacts of global warming on agriculture as witnessed in Kenya today.
(3 Marks)

Question Three
State FOUR reasons why the current sources of energy in the world are
considered to be unsustainable. (4 Marks)

Explain THREE reasons why parents in industrializing nations continue to have many children.
(3 Marks)

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

SECTION B – 40 MARKS : ANSWER ANY TWO QUESTIONS
Question Four
Discuss any THREE benefits and any two consequences experienced by the agricultural societies as a result of their interaction with the natural environment.
(10 Marks)

Discuss any FIVE ways in which the current global climate change having on the human health.
(10 Marks)

Question Five
Scientist believe that life of earth did not develop until after the ozone layer was in place, indication that the ozone layer may essential to life on earth. Describe FIVE major reasons for this belief.
(10 Marks)
Explain any FIVE possible causes of wildlife extinction.
(10 Marks)

Question Six
Sahara desert is expanding towards the equator at rate of 48 kilometers annually. Discuss any ten major consequences of this desert extinction in Kenya. (20 Marks)

Environmental Science (Envi 201) Question Paper

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