During an ice age, huge glaciers cover large portions of Earth’s surface. These glaciers can affect the surface of the earth through erosion and deposition. Also, during ice ages, so much of Earth’s water is bound up in glaciers that sea levels fall.Click to see full answer. Considering this, how did the ice age change Earth?An ice age causes enormous changes to the Earth’s surface. Glaciers reshape the landscape by picking up rocks and soil and eroding hills during their unstoppable push, their sheer weight depressing the Earth’s crust.Subsequently, question is, why is Earth’s sea level lower during an ice age? When there was much continental crust near the poles, the rock record shows unusually low sea levels during ice ages, because there was much polar land mass on which snow and ice could accumulate. During times when the land masses clustered around the equator, ice ages had much less effect on sea level. Also know, how did the ice age affect plants? During this period the climate gradually cooled, leading to a series of ‘ice ages’. This global cooling was caused by a dramatic reduction in atmospheric carbon, which this research now suggests was triggered by the arrival of plants. Among the first plants to grow on land were the ancestors of mosses that grow today.What are the effects of an ice age?Ice age glaciers caused erosion and deposition, which resulted in unique features such as horns, cirques, lakes, U-shaped valleys, moraines and drumlins. Indirect effects include pluvial lakes, isostatic depression and a change in sea level.