The dating and study of annual rings of trees is called:
Dendrochronology
Dendrochronology dates and studies tree rings. Matching patterns in overlapping ring sequences can establish calendar years and provide evidence about past environmental conditions.
In which of the following atmospheric layers ozone gas is concentrated?
Ozone layer depletion is a major phenomenon in :
By which layer of the atmosphere the ultra-violet rays are absorbed ?
The layer of very rare air above the mesosphere is called the _____________.
Air moves from the region where the air _______.