Question

NITROGEN CYCLE WORKSHEET

Answer 1

Answer:

Question.1 Name the three processes in which oxygen is used.

Answer. Combustion, respiration and in the formation of oxides of nitrogen.

Question.2 Name two natural resources available on the earth. [SAII -2014]

Answer. Water and air.Question.3 Give one example of biotic component of the biosphere.

Answer. All animals, plants and microorganisms.

Question.4 Identify which of the following are not the part of biotic environment, soil, plants, fish, air, insects.

Answer. Soil, air.Question.5 Name two oxides formed by burning of fossil fuels, which are responsible for acid rain. [SAII – 2013]

Answer. The oxides of nitrogen and sulphur:

(i) Sulphur dioxide and sulphur trioxide.

(ii) Nitrous oxide and nitrogen dioxide.

Question.6 Mention the two forms of precipitation in nature when the temperature of air is very low.

Answer. (i) Fog and smog, (ii) Hail, (iii) Mist, (any two)