What does the term 'NPK' mean?
Nitrate, Potash and Calcium
Nitrogen, Phosphate and Chromium
Nitrogen,Phospherous and Potassium
Nitrate, Protein and Vitamin
Over the last 100 years global sea level has risen by about
20-25cm
10-12.5cm
25-50cm
15-30cm
One of the following factors does not lead to soil formation in nature
the sun
water
wind
polythene bags
Oxygen is harmful for
ferns
nitrogen fixing bacteria
chara
mango tree
What compounds are identified as contributing to acid rain?
carbon dioxide
sulphur oxides
mercury oxides
phosphates
Rainfall patterns depend on
the underground water table
the number of water bodies in an area
the density pattern of human population in an area
the prevailing season in an area
Which of the following element's oxides contribute to acid rains?
silicon
sodium
oxygen
carbon
Which of the following is not a green house gas?
Methane
Carbon dioxide
Carbon monoxide
Ammonia
All of earth's water, land and atmosphere, within which life exists is known as
a population
a community
a biome
the biosphere
Phosphates and nitrates entering a lake cause an explosive growth of algae, this is called
aestivation
mutualism
humus
an algal bloom