Environmental Studies Mid - I, January - 2012

1.An example of something that is abiotic.
  • a polar bear
  • a small insect
  • an oak tree
  • the temperature of the air
Answer: D
2.What is the definition of a Population?
  • All the animals in an area
  • A number of organisms of the same species in a given area
  • The biological components of an ecosystem
  • All of the above
Answer: B
3.How do we calculate Net Primary Productivity?
  • NPP - T = GPP
  • GPP + R = NPP
  • R + NPP = 2R
  • GPP - R = NPP
Answer: D
4.Isostacy is caused by:
  • An asteriod hit
  • the state of gravitational equilibrium between the earth's lithosphere and asthenosphere
  • Loss of mantle from volcanoes
  • Weight of ice sheets
Answer: B
5.A tectonic plate is:
  • A piece of crust floating on the mantle
  • A continent
  • A piece of land floating in the sea
  • An ice sheet on the North Pole
Answer: A
6.What are the first products when Ozone reacts with sunlight?
  • O4 + O
  • 2O2 + Light
  • O2 + O + Light
  • O3 + Light
Answer: C
7.The lower, dense region of the atmosphere is known as
  • Troposphere
  • Ionosphere
  • Stratosphere
  • Hydrosphere
Answer: A
8.Nitrogen-fixing Rhizobiumcterium
  • Lactobacillus
  • Clostridium
  • Rhizobium
  • Salmonella
Answer: C
9.Steam is the _______ form of water
  • An Element
  • A Mixture
  • A Compound
  • An Alloy
Answer: B
10.What starts every food chain?
  • Sun
  • Decomposers
  • Plants
  • None of the above
Answer: C
11.The amount of solar radiation that reaches a point of the earths surface is called as ---------
Answer: Insolation
12.The group of organisms which convert light into food are called --------
Answer: Autotrophs
13.Secondary sewage treatment can best be described as being a _______ process.
Answer: biological
14.____________ is the main cause for the extinction of some species in tropical forest?
Answer: Deforestation
15.--------------- is an important measure of the oxygen-using potential of water and wastewaters.
Answer: Biochemical oxygen demand (BOD)
16.The three major biotic components of ecosystem structure are ----------
Answer: Producers, herbivores, carnivores.
17.Manas sanctuary is located at ------------
Answer: Assam
18.The depth to which adequate light for photosynthesis can penetrate into water is known ____________
Answer: euphotic zone
19.The major component of photochemical smog is ----------
Answer: ozone
20.The vertical distance between Earth's surface and the height to which convectional movements extend is
called as -----------
Answer: mixing depth