Water cycle

• What percentage of the worlds water is saline seawater

  96%
• How much of the total freshwater is locked up in ice and glaciers 


  Over 68%Over 68%
• how much does fresh surface water (rivers lakes) constitute to total water

  only 1%
• what is the hydrosphere

  the oceans
• how do levels of water change in the hydrosphere

  during ages of ice sea levels can drop due to an increase in water stored as ice caps and glaciers. during warm periods sea levels can rise.
• during the last warm period 125,000 years ago how much higher were sea levels then today

  5.5 metres
• how much of earths total water is stored in the atmosphere

  approximately 0.001%
• how does water cycle through the atmosphere

  evaporation and transpiration change liquid into water vapour which then ascends into the atmosphere due to rising air currents. Cooler temperatures at altitude allows the vapour to condense into clouds and strong winds moves the clouds around the world until the water falls as precipitation to replenish the I and based of the water cycle.
• what is sublimation? 


  the process by which water changes from a solid to a gas bypassing liquid phase
• What feeds the most and least water into the atmosphere?

  90% of water in the atmosphere is produced evaporation from water bodies while the other 10% comes from transpiration by plants. A very small amount of water enters the atmosphere by sublimation.
• what does the cryosphere consist of ?

  ice caps, ice shelves, sea ice and glaciers
• how much of earths surface is covered by ice

  around 10%
• What is sea ice

  Frozen ocean water that is free-floating, freezing and melting each year.
• what is the lithosphere

  land based storage of water such as rivers streams ponds lakes and reservoirs
• how much of earths total water total water is fresh water

  2.5%
• how does groundwater storage occur

  precipitation falls on land and infiltrated deep into the ground to become ground water.
• water store large quantities of water underground

  aquifers
• how long can water remain within ground water storage

  water from aquifers can take thousands of years to move back to the surface.