MULTIPLE CHOICE QUESTIONS:
1) Which of the following is renewable energy source?
a) Thermal, b)Hydroelectric, c)Nuclear , d) Solar
Ans: (d) Solar
2) The zone on earth where alone life exists is called?
a) Hydrosphere, b) Lithosphere, c) Biosphere, d)Troposphere
Ans: (c) Biosphere
3) World Environment day is ?
a) 5th June, b)5th July, c) 5th October, d) 5th January
Ans: (a) 5th June
4) In steady state conservation system?
a) both accumulation and reaction are 0, b) accumulation is 0, c) reaction is 0, d) none
Ans: Not sure about the correct ans if anyone knows comment below
5) The topmost part of the earth is called ?
a)lithosphere, b)mantle, c) outer core, d)inner core
Ans: (a) Lithosphere
6) The most potentially renewable energy is ?
a) Sunlight, b)wind, c) Tidal Energy, d)Biomass
Ans: (a) Sunlight
7) What are the two basic categories of an ecosystem?
a)Aquatic and terrestrial, b) Aquatic and Forest, c) Ponds and lakes, d) Ponds and lakes
Ans: (a)Aquatic and terrestrial
8) Biotic factor of eco system is?
a) Sunlight, b) Soil, c) Wind, d) Producer and Consumer
Ans:(d) Producer and Consumer
9) In an open system ?
a) Only mass exchange not energy, b) Both energy and mass exchange, c) Neither mass nor energy exchange, d)All of the above
Ans: (b) Both energy and mass exchange
10) Which one is the example of lentic aqua ecosystem?
a) Pond, b) River, c) Spring, d) Stream
Ans: (a) Pond
11) Which of the following is an abiotic component of a pond?
a) Bacteria b) Fungi
c) Fishes d) Water
Ans: (d) Water
12) The organisms at the base of the food chain are
a) Carnivores, b) Herbivores, c) Decomposers, d) Producers
Ans: (d) Producers
13) A food web consists of
a) A part of a food chain, b) Multi-linear food chain, c) A set of different producers & consumers, d) Interlocking Food chains
Ans: c) A set of different producers & consumers
14) Denitrification means
a) Conversion of nitrate to nitrogen, b) Conversion of ammonium to nitrogen, c) Conversion of ammonium to nitrate, d) Conversion of nitrate to nitrite
Ans : (a) Conversion of nitrate to nitrogen
15) Fungi and bacteria carry out a very significant step in ?
a) Grazing food chain, b) Detritus food chain , c) Parasitic food chain, d) All
Ans : (b) Detritus food chain
16) Nitrosomonas and Nitrobacter play significant role in
a)Nitrification b) Nitrate reduction
c) Denitrification d) none
Ans: (a) Nitrification