Page 1 - 3- Home Assignment I (Obj & Subj)-Air, Rain and Air pollution

SAI International School
Subject- Biology
Chapter- Natural Resources
Subtopic- Air, Rain and Air pollution
Module- 31
Home Assignment – I

Objective (MCQ)

1. If there were no atmosphere around the earth, the temperature of the earth will
(a) increase
(b) go on decreasing
(c) increase during the day and decrease during the night
(d) be unaffected
2. The two forms of oxygen found in the atmosphere are
(a) water and ozone
(b) water and oxygen
(c) ozone and oxygen
(d) water and carbon-dioxide
3. Rainfall patterns depend on
(a) the underground water table
(b) the number of water bodies in an area
(c) the density pattern of the human population in an area
(d) the prevailing season in an area
4 One of the following processes is not a step involved in the water-cycle operating
in nature
(a) evaporation
(b) transpiration
(c) precipitation
(d) photosynthesis
5 Which of the following is not a greenhouse gas?
(a) Methane
(b) Carbon dioxide
(c) Carbon monoxide
(d) Ammonia
6 Ozone-layer is getting depleted because of
(a) excessive use of automobiles
(b) excessive formation of industrial units
(c) excessive use of man-made compounds containing both fluorine and chlorine
(d) excessive deforestation.
7 Which of the following is a recently originated problem of the environment?
(a) Ozone layer depletion
(b) Greenhouse effect
(c) Global warming
(d) All of the above
8 An increase in carbon dioxide content in the atmosphere would not cause
(a) more heat to be retained by the environment
(b) increase in photosynthesis in plants
(c) global warming
(d) abundance of desert plants
9 An increase in carbon dioxide content in the atmosphere would not cause
(a) more heat to be retained by the environment