Write any two uses of carbon dioxide gas.

Which of the following is not a greenhouse gas?

What is the greenhouse effect? Name the atmospheric gases which lead to it and what is its impact on the global climate?

State reasons for the following:
$(i)$ Excess burning of coal causes greenhouse effect.
$(ii)$ Soil is a mixture.
$(iii)$ Temperature ranges from $-190^{\circ} C$ to $110^{\circ} C$ on the surface of the moon.

$(a)$ Study the given figure of the nitrogen cycle and mention what $A, B, C, D,$ and $E$ represent.
$(b)$ What will happen if step $A$ does not occur?
$(c)$ Write the role of nitrogen-fixing bacteria in the biosphere.
$(d)$ Name two biologically important compounds that contain both $O_2$ and $N_2$.

During summer,if you go near the lake,you feel relief from the heat,why?