(2) The Global Water Cycle

• Freshwater makes up 2.5% of all earths water
• The biosphere system refers to all living organisms on Earth and their interactions with the other systems.
• The cryosphere system includes all forms of frozen water on Earth, such as glaciers, ice caps, and permafrost.
• The lithosphere system encompasses the solid outer layer of Earth, including the crust and upper mantle.
• The hydrosphere system encompasses all water on Earth, including oceans, lakes, rivers, and groundwater.
• The atmosphere system refers to the layer of gases surrounding the Earth.
• The pedosphere system refers to the outermost layer of the Earth's surface, including soil and sediment.
• only 0.9% of earths water is accessible to humans
• 68.7% of water is frozen in the cyrosphere
• 0.2% of water vapour is in the atmosphere
• There is only 1% of water in the hydrosphere
• 30.1% of ground water in the lithosphere
• the water cycle is a closed system
• The water cycle is defined as : the continuous movement of water on, above and below Earth's surface.