1. Biotic environment includes
(A). producers
(B). consumers
(C). decomposers
(D). all the above
Right Answer: D
2. Decomposers include
(A). bacteria
(B). fungi
(C). both
(D). animals
Right Answer: C
3. Abiotic environment does not include
(A). air
(B). water
(C). soil
(D). plants
Right Answer: D
4. Vermicomposting is done by
(A). fungus
(B). bacteria
(C). worms
(D). animals
Right Answer: C
5. The group of organisms which convert light into food are called
(A). autotrophs
(B). heterotrophs
(C). decomposers
(D). omnivores
Right Answer: A
6. Which one the following is not biodegradable?
(A). vegetables
(B). fruits
(C). earthworm
(D). aluminium foil
Right Answer: D
7. Animal(s) which is/are active at night.
(A). owl
(B). rat
(C). cockroach
(D). all the above
Right Answer: D
8. An animal that can tolerate the heat of the desert is
(A). rats
(B). camel
(C). cow
(D). lion
Right Answer: B
9. Air pollution is caused by
(A). Insecticides
(B). Sewage
(C). Smoke
(D). Loud speakers
Right Answer: C
10. If waste materials contaminate the source of drinking water which of the following diseases will spread?
(A). Scurvy
(B). Typhoid
(C). Malaria
(D). Anaemia
Right Answer: B
11. In our country the Van Mahotsav Day is observed on
(A). Second of October
(B). First of December
(C). Tenth of August
(D). First of July
Right Answer: D
12. Which of the following wastes cannot be decomposed by bacteria to form compost?
(A). Kitchen wastes
(B). Plastic and polythene bags
(C). dead plants
(D). bodies of insects living in the soil
Right Answer: B
13. Which of the following problems is not created by noise pollution ?
(A). Diarrhoea
(B). Hypertension
(C). Deafness
(D). Irritation
Right Answer: A
14. Plants are green because of the presence of a pigment called:
(A). glucose
(B). nitrogen
(C). chlorophyll
(D). oxygen
Right Answer: C
15. Air is composed of gases, water vapours and
(A). dust particles
(B). rainfall
(C). snowfall
(D). light
Right Answer: A
16. Medicine of quinine is provided by
(A). Eucalyptus plant
(B). aconite plant
(C). cinchona plant
(D). money plant
Right Answer: C
17. Chief source of energy in environment is
(A). fire
(B). moon
(C). sun
(D). stars
Right Answer: C
18. When trees are cut, amount of oxygen
(A). decreases
and
(B). increases
(C). both
(D). remains same
Right Answer: A
19. Process through which plants reproduce:
(A). Eating
(B). Evaporation
(C). Pollination
(D). Condensation
Right Answer: C
20. 71% of earth surface is covered with:
(A). land
(B). air
(C). water
(D). coal