Question

how did ice age occur​

Answer 1

Answer:

ice age is triggered when summer temperature in the Northern hemisphere falls down to rise into a freezing temperature for many years . this means that winter snowfall doesn't stop and build up many years compressing into ice

Answer 2

Explanation:

an ice age is triggered when summer temperature in the Northern hemisphere fail to rise of freezing for-year....... The onset of an ice age is related to the mylankovitch cycle where regular changes in the earth's tilt and Orbit combine to effect which areas on Earth get more and less solar radiation