Environmental Studies - 1

1. Biotic environment includes


(a) producers (b) consumers


(c) decomposers (d) all the above


Answer: (d) all the above


2. Decomposers include


(a) bacteria (b) fungi


(c) both (d) animals


Answer: (c) both


3. Abiotic environment does not include


(a) air (b) water


(c) soil (d) plants


Answer: (d) plants


4. Vermicomposting is done by


(a) fungus (b) bacteria


(c) worms (d) animals


Answer: (c) worms


5. The group of organisms which convert light into food are called


(a) autotrophs (b) heterotrophs


(c) decomposers (d) omnivores


Answer: (a) Autotrophs


6. Which one the following is not biodegradable?


(a) vegetables (b) fruits


(c) earthworm (d) aluminium foil


Answer: (d) Aluminium Foil


7. Animal(s) which is/are active at night.


(a) owl (b) rat


(c) cockroach (d) all the above


Answer: (d) All the above


8. An animal that can tolerate the heat of the desert is


(a) rats (b) camel


(c) cow (d) lion


Answer: (b) camel


9. Air pollution is caused by


(a) Insecticides (b) Sewage


(c) Smoke (d) Loud speakers


Answer: (c) smoke


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


Answer: (b) Typhoid


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


Answer: (d) First of July


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


Answer: (b) Plastic and polythene bags


13. Which of the following problems is not created by noise pollution ?


(a) Diarrhoea (b) Hypertension


(c) Deafness (d) Irritation


Answer: (a) Diarrhoea


14. Plants are green because of the presence of a pigment called:


(a) glucose (b) nitrogen


(c) chlorophyll (d) oxygen


Answer: (a) chlorophyll


15. Air is composed of gases, water vapours and


(a) dust particles (b) rainfall


(c) snowfall (d) light


Answer: (a) dust particles


16. Medicine of quinine is provided by


(a) Eucalyptus plant (b) aconite plant


(c) cinchona plant (d) money plant


Answer: (c) cinchona plant


17. Chief source of energy in environment is


(a) fire (b) moon


(c) sun (d) stars


Answer: (c) sun


18. When trees are cut, amount of oxygen


(a) decreases (b) increases


(c) both (a) and (b) (d) remains same


Answer: (a) decreases


19. Process through which plants reproduce:


(a) Eating (b) Evaporation


(c) Pollination (d) Condensation


Answer: (c) pollination


20. 71% of earth surface is covered with:


(a) land (b) air


(c) water (d) coal


Answer: (c) water