1. in which layer do virtually all weather phenomena take place A.exosphere B.mesosphere C.stratosphere
2.what is meant by trace gases?
A.they are not harmful B.they are emitted by trees C.they are naturally occurring on earth.
D.they are present in very small amount
3. in what direction donwind blow?
A.from the northeast to the southwest
B.from the southwest to the northeast
C.from low pressure areas to high pressure areas
D. from high-pressure areas to low-pressure areas