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Environmental science questions.

Environmental science questions.

Find Environmental science university examination questions in acaproso.com

# Question
1

Describe the main types of biogeochemical cycles. How are they connected to the nutrients cycles?. How  do humans affect these cycles?


Long answers
2

Discuss the toxicity of lead , especially with respect to its neurological effects. Which sub-groups of population are particular risk from lead?


Long answers
3

Find the doubling time for the exponential growth model frac{dN}{dt}=aN

  1. t=2N_{0}
  2. t=lnN_{0}
  3. t=frac{ln2}{a}
  4. t=e^{aN_{0}}

Multiple choices
4

Garbage is produced in every home and industry ; and most of the garbage is dumped into the ground. Often, this creates a pollution problem. The cost of garbage collection and disposal is at an alarming rate. Local councils need to predict the amount of garbage that will placement in order to make financially feasible plans for the future. The data on garbage production in a particular  area is as follows:

Year Amount of garbage produced per week (in tonnes)

1985

1990

1995

2000

64

70

85

108

Predic the amount of garbage that will be preduced weekly in the year 2005

  1. 118.5
  2. 122.6
  3. 110.8
  4. 120.2

Multiple choices
5

A linear function is of the form f(x)=mx+b

  1. Simplifies modelling because all the measurements lie on a straight line
  2. Describes unbounded decrease for m<0
  3. Is always valid because there are no errors
  4. Can be used without any assumptions

Multiple choices
6

Given the solution of the logistic equation as N(t)=frac{N_{0}K}{N_{0}+(K-N_{0})e^{-rt}}

where N is population at any given time  and N_{0} the initial population, then the environmental carrying capacity is

  1. N(t)
  2. K
  3. N_{0}
  4. e^{-rt}

Multiple choices
7

Define the following terms

  1. Environmental pollution
  2. Ozone hole
  3. A carcinogen
  4. Secondary air pollutants
  5. Heavy metals
  6. Greenhouse gases

Short answers
8

Give one major environmental effect caused by or that would arise from each of the following problems of air pollution.

  1. Acid rain
  2. Global warming
  3. Ozone layer depletion
  4. Photochemical smog

Short answers