CBSE - Natural Resources

1 Natural Resources 

Which one is more permanent ecosystem?

(1) Forest
(2) Mountain
(3) Desert
(4) Sea

2 Natural Resources 

Which of the following practices are suitable to farmer with less wat er resources ?
(A) Select a short term crop (B) Cultivate commercial crops
(C) Adopt drip irrigat ion system (D) Crop holiday
Choose the correct answer :
(1) A and C (2) A, B and C (3) A and D (4) C and D

3 Natural Resources 

Accumulation of non-biodegradable pesticides in the food chain in increasing amount at each higher trophic level is known as
(1) Eutrophication (2) Pollution (3) Biomagnification (4) Accumulation
 

4 Natural Resources 

Main constituent of atmosphere of mars is

(1) O₂
(2) CO₂
(3) Ozone gas
(4) none

5 Natural Resources 

Read the following paragraph and fill up the blanks with correct option.

Decline in the thickness of ozone layer over a restricted area is called _________ . It was first discovered over__________ in 1985. Amount of atmospheric ozone is measured by ___________ spectrometer and is expressed in ___________ Units

(1) Ozone hole, Australia, Dobson, Watson
(2)  Ozone hole, Antarctica, Dobson, Dobson
(3) Ozone shield, Greenland, Watson, Dobson
(4) ODS hole, USA, Watson, Watson

6 Natural Resources 

The regions of earth from outside to inside is

(1) Core, mantle, and crust
(2)  Core, crust, and mantle
(3) crust, mental, and core
(4) mantle, core, and crust

7 Natural Resources 

The study of interaction between living organism and environmentis called 
(1) Ecology (2) Phytogeography (3) Psychology (4) Mycology

8 Natural Resources 

What are the factors which contribute in the formation of soil ?

(1) Sun and water
(2)  Sun and wind
(3) Wind and living organism
(4) Both (1) & (3) 

9 Natural Resources 

Which of the following is not consumer?

(1)  Carnivores
(2)  Herbivores
(3)  Autotrophs
(4)  Omnivores

10 Natural Resources 

Which one of these are not fossil fuel

(1) coal
(2)  Petrol
(3) Diesel
(4) wood