Question

Northern lights or auroras can be seen within the _____ sub-layer.

A.ozonosphere
B.ionosphere
C.exosphere
D.troposphere

Answer 1

Northern lights or auroras can be seen within the ionosphere sub-layer. This is the range where cosmic and the Sun's radiation are ionized.

Answer 2

Northern lights or auroras can be seen within the IONOSPHERE sub-layer. So, the answer is B.