How do the unique properties of water make it so important for life on earth

Polarity creates water molecules that are strongly attracted to one another.  This attraction creates a high surface tension allowing water to clump together and flow through plant roots and human blood capillaries.  

Water is the only natural substance that can exist in all three states of matter – solid, liquid, and gas. If water did not have these special properties, then all life would die. For example, lakes and rivers would freeze solid and all aquatic life would not be able to survive.  

Water is so special that its physical properties even influences our weather. We wouldn't have rain without the water cycle and evaporation.  

increase soil erosion                                             reduce soil erosion

cattle grazing                                                         hydroseeding

deforestation                                                         contour plowing

                                                                                planting vegetation

plant roots basically hold the top soil

together and stop soil erosion because

in such situation top soil is not removed

during flood but cattle grazing causes

soil erosion because cattle consume the

grasses and herbs and top soil is exposed.

same situation occurs because of

deforestation, the trees and plants are cut

down to expose top soil which causes soil

erosion