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.

(N/A) $(i)$ Excess burning of coal releases greenhouse gases such as carbon dioxide $(CO_2)$ and hydrocarbons into the atmosphere.
These gases have the property of trapping solar heat,which leads to the greenhouse effect and global warming.
$(ii)$ Soil is considered a mixture because it is composed of various substances including weathered rock particles of different sizes,organic matter (humus) from decayed living organisms,microscopic life forms,air,and water (moisture).
$(iii)$ The moon lacks an atmosphere. An atmosphere acts as a blanket that regulates surface temperature by preventing extreme fluctuations.
In the absence of an atmosphere on the moon,there is no mechanism to trap heat during the day or retain it at night,causing the temperature to fluctuate drastically from $-190^{\circ} C$ to $110^{\circ} C$.