Animals get carbon in the form of ………
a) organic food
b) urea
c) nitrates
d) all of these
Which of the following process/es release/s carbon dioxide back into the environment by animals and plants?
a) respiration
b) nitration
c) photosynthesis
d) all of these
A chemical
reaction between substances and oxygen in which CO2, heat and light
is generated, is called a ……..reaction.
a) respiration
b)
decomposition
c) combustion
d) all of these
Animals and plants buried under earth crust and converted into…..
a) oil
b) fossil fuel
c) food
d) gas
The combustion of fossil fuel in factories, automobiles and houses is adding up………in the atmosphere.
a) carbonates
b) carbon dioxide
c) carbon monoxide
d) bicarbonates
The oxygen cycle is interconnected to which cycle given below?
a) nitrogen
b) carbon
c) water
d) chlorine
