Elements on Earth move among reservoirs, which are storage places. The Earth's reservoirs include: Solid Earth, Bodies of Water, Atmosphere, and Organisms. Just like the Earth, the Water Cycle has specific reservoirs too. They are: Atmosphere, Clouds, Oceans and Lakes, Organisms, Rivers, Groundwater, and Ice. Atmosphere: The atmosphere is a reservoir for water when it is in the form of vapor. Clouds: Water is stored in the atmosphere as clouds, which are just a large collection of tiny drops of water. Oceans, Lakes, Rivers: Oceans, lakes, and rivers are large expanses of water that collect water from precipitation.