Which kind of Igneous rock has more Silica?

When was Carboniferous Period?

First layer of formation of Igneous rock includes________

Sedimentary Rocks are often known as Stratified rocks and layers are called______

The percentage of humidity in cold dry air is as much as ________ in hot equatorial regions

Which of the following pair is correct?

Clouds absorb a part of ________ radiation and then radiates back to the surface

During winter season, as the earth starts losing its heat after sunset, there is a drop in temperature called