Ice sheets are massive, thick layers of ice that cover large areas of land, primarily found in polar regions. The two largest ice sheets are located in Antarctica and Greenland. These sheets form from accumulated snowfall that compresses over time, creating dense ice. Ice sheets play a crucial role in the Earth's climate system and sea level. As they melt due to rising temperatures, they contribute to rising ocean levels, which can impact coastal communities worldwide. Understanding ice sheets is essential for predicting future climate changes and their effects on the planet.