Page 1 - 3 Home Assignment I(Obj &Subj)-Ozone layer Depletion

SAI International School
Subject- Biology, Class- X
Chapter- Our Environment
Subtopic- Ozone Layer and its Depletion,
Managing the Garbage that We Use
Module-32
Home Assignment I

Q.1 A food chain comprises birds, green plants, fish and man. The concentration 1
of harmful chemical entering the food chain will be maximum in -
(a) green plants
(b) man
(c) birds
(d) fish

Q.2 Excessive exposure of humans to UV-rays results in - 1
(i) damage to immune system
(ii) damage to lungs
(iii) skin cancer
(iv) peptic ulcer

(a) (i) and (ii)
(b) (ii) and (iv)
(c) (i) and (iii)
(d) (iii) and (iv)

Q.3 Which of the following substances will not be converted to compost when 1
added in a composting pit?
(a) Waste paper
(b) Fruit and vegetable peels
(c) Human and animal excreta
(d) Plastic bags

Q.4 Excessive exposure to ultraviolet radiation causes - 1
(a) inflammation of liver
(b) cancer of skin
(c) damage to the lungs
(d) jaundice

Q.5 Global warming is a phenomenon related to: 1
(a) Evaporation
(b) Ecological balance
(c) Greenhouse effect
(d) Desertification

Q.6 The substance which is chiefly responsible for the depletion of ozone layer 1
is:
(a) CFCs
(b) CH4
(c) DDT