In science, recently we have been doing projects on erosion. Our form of erosion are glaciers. Glaciers are large “chunks” of ice that can cover entire continents. there are two types of glaciers. the first is a valley glacier, which is depicted above⬆️. A glacier forms when more snow falls than melts. the snow hardens into ice over time.When the ice reaches 30-40 meters deep, it begins to move downhill, scraping away material as it goes.