If the ozone layer disappeared, life on earth would be exposed to concentrations of ultraviolet radiation.

The answer is higher.

An ozone layer is composed of ozone molecules (O). With fewer ozone molecules, the ozone layer becomes thinner and a higher concentration of harmful ultraviolet light passes through it and reaches a life on Earth. 

Answerdistinguish between the mercalli scale and the richter scale;

Answer. scale;