Glaciers leave behind deposits known as glacial till, which are unstratified, poorly-sorted sediments. Glaciers move a wide range of sedimentary particles from small clay-sized particles to large boulders. When the glacier either melts or retreats, these poorly-sorted sediments are deposited.
Because the earth's rotation isn't a perfect circle, so it gets different amounts of sun in certain times
A cell which contains cytoplasm, cell membrane and a nucleus
