The water cycle and water insecurity exam questions with 100% correct answers.

What are stores? - Reservoir where water is held, such as the oceans What are fluxes? - The rate of flow between the stores What are processes? - The physical mechanisms that drive the fluxes of water between stores What is a closed system? - >Fixed amount of water with no external inputs or outputs >Water is continually circulated >The amount of global water is finite and constant >State in which water exists changes (liquid, vapour, ice) and proportions of global water held in each state varies over time with changes in climate What drives the global hydrological cycle? - >Solar energy in the form of heat >Gravitational energy (causes rivers to flow downhill and precipitation to fall to the ground) What are the four main stores? - >Oceans >Glaciers and ice sheets (cryosphere) >Surface runoff >Atmosphere 1.1.2 Stores and fluxes Size of stores - (1000 km cubed) Oceans - 1,335,040 96.9% Atmosphere - 13 0.001% Biosphere - 1 0.0001% Cryosphere - 26,350 1.9%Groundwater - 15,300 1.1% Surface water - 178 0.01% Oceans as a water store -Most of water is stored in liquid form with a small percentage as icebergs