Deck 6: Environmental Science

Question 1

The range of normal human hearing is in the range of

A)10 Hz to 80 Hz
B)50 Hz to 80 Hz
C)50Hz to 15000 Hz
D)15000 Hz and above

Answer 1

50Hz to 15000 Hz

Question 2

The pollution which does not persistent harm to life supporting system is

A)Noise pollution
B)Radiation pollution
C)Organochlorine pollution
D)All of these

Answer 2

Noise pollution

Question 3

Soap and detergents are the source of organic pollutants like:

A)glycerol
B)polyphosphates
C)sulphonated hydrocarbons
D)all of these

Answer 3

all of these

Question 4

Growing agricultural crops between rows of planted trees is known as

A)Social forestry
B)Jhum
C)Taungya system
D)Agroforestry

Question 5

The main atmospheric layer near the surface of earth is

A)troposphere
B)mesophere
C)ionosphere
D)stratosphere

Question 6

Man made sources of radiation pollution are:

A)mining
B)explosion of nuclear weapons
C)nuclear fuels and preparation of radioactive isotopes
D)all of these

Question 7

The cutting down of trees and setting them on fire and raising crops on the resulting ash is called:

A)Pyrolysis
B)Jhum
C)Taungya system
D)Shift cultivation

Question 8

Percentage of forest area recommended by the the national forest policy for plains is

A)33%
B)67%
C)30%
D)10%

Question 9

Example of primary pollutant

A)SO₂
B)NO₂
C)CO
D)hydrocarbons

Question 10

Commonly used radioactive isotopes in scientific research

A)14 C
B)125 I
C)32 P
D)all of these

Question 11

Drinking of fluoride containing water results :

A)fluorosis
B)chlorosis
C)minemata
D)methaemoglobinema

Question 12

Chipco movement is a public agitation that occurred in

A)Mansbal area in Kashmir
B)Silent valley in Kerala
C)Sundarban area in Bengal
D)Tehri Garhwal area of Uttar Pradesh

Question 13

High biological oxygen demand indicates:

A)absence of microbial pollution
B)moderate microbial pollution
C)intense level of microbial pollution
D)all of these

Question 14

Ozonosphere seen in

A)ionosphere
B)thermosphere
C)mesophere
D)stratosphere

Question 15

Harmful trace metals in fly ash:

A)antimony
B)cadmium
C)arsenic
D)all of the above

Question 16

In a pyramid of numbers, in a grassland ecosystem, the largest population is that of

A)Producers
B)Tertiary Consumers
C)Secondary consumers
D)Herbivores

Question 17

Which of the following statements regarding species interdependence are true?
A. An association of two species where one is benefitted and other remains unaffected called mutualism
B.An interspecific association where both partners derive benefit from each other is called commensalism
C. A direct food relation between two species of animals in which one animals kills and feed on another is referred as predation
D. A relationship between two species of organism where both the partners are benefitted from each other is called symbiosis.

A)A and B only
B)C and D only
C)A and C only
D)B and C only

Question 18

The formula of growth rate for population in given time is

A)dt/dN=rN
B)dt/rN=dN
C)dt/rN=dt
D)dN/dt=rN

Question 19

One greenhouse gas contributes 14% to total global warming and another contributes 6%. These are respectively identified as

A)N₂O and CO₂
B)CFCs and N₂O
C)Methane and CO₂
D)Methane and CFCs

Question 20

Which of the following is false?

A)Quantity of biomass in a trophic level at a particular period is called as standing crop
B)The energy content in a trophic level is determined is determined by considering a few individuals of a species in that trophic level.
C)The succession that occurs in newly cooled lava is called primary succession
D)Rate of succession is faster in secondary succession

Question 21

Many freshwater animals cannot live for long in sea water and vice versa mainly because of the

A)Change in N levels
B)Change in the levels of thermal tolerance
C)Variations in light intensity
D)Osmotic problems

Question 22

Which of the following regarding ecological pyramids is not correct?

A)In most ecosystems, the pyramid of numbers and biomass are up right
B)In tree dominated ecosystem the pyramid of numbers is inverted
C)The pyramid of energy expresses mainly the rate of food production
D)In deep water ecosystem, the pyramid of biomass is upright