Food is a renewable resource due to…
a) pest control
b) continuous photosynthesis
c) mechanical farming
d) improved crop varieties via biotechnology
“ARABLE” means …….
a) not grown since long
b) recently ploughed field
c) watered the night before
d) fit for cultivation
Which of the following are the factors through which man is depleting natural resources?
a) slash and burn agriculture practices, technological and industrial development
b) erosion, irrigation, mining, aquifer depletion, pollution and forestry
c) over-consumption, unequal distribution of resources and over-population
d) all of these
Which of the following does not bring about erosion of soil?
a) Carolers forming
b) extensive ploughing
c) heavy grazing
d) moderate grazing
Which of the following is/are the non-conventional energy sources?
a) tidal power
b) wind power
c) geothermal power
d) all of these
Explanation: tidal energy also known as lunar energy
The outer crust of the earth has an average thickness of……..km.
a) 3
b) 4
c) 32
d) 1000
