When particles collide with the surface of the solid.
a pure compound because an element is untouched and is just itself
Answer : Option D) The atmospheric conditions vary as one changes latitude and altitude.
Explanation : The composition of the atmosphere varies according to the latitude and altitude because of the unequal heating of the earth surface at different latitudes and altitudes which results into atmospheric changes. It also creates different regions and zones.
Adaptation actually and also following control measures on how to avoid it from happening
The velocity would be 0.5 i think
