A glacier once covered most of which state -- Illinois or Florida?

The correct answer is Illinois, as this state was largely covered by glaciers during the last Ice Age, approximately 20,000 years ago. The advance of these glaciers shaped the landscape, creating features such as the Great Lakes and leaving behind fertile soil, known as glacial till, which is prevalent in the region today.

In contrast, Florida has a much warmer climate and is predominantly composed of limestone and sandy soils, featuring a different geological history. The state’s landscape was not significantly affected by glacial activity. Understanding this glacial history is crucial, particularly in the context of how geological processes shape environments and influence agriculture and development in areas like Illinois.