Use the dropdown menus to complete each statement about how groundwater moves. 1) water moves down through cracks and spaces in materials. these are materials that allow water through to fill cracks and spaces and form the saturated zone. a) permeable b) impermeable c) saturated 2) eventually, the water moves down until it reaches a layer that is , which blocks the water. this layer is at the bottom of the saturated zone. a) permeable b) impermeable c) saturated