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Sources of underground water are;Rain water that infiltrates and percolates into the groundMagmatic/plutonic water tapped in the rocks undergroundLake/sea/ocean water that percolates into the groundSnow melt in are of glaciation may lead to percolation of the melted water.
Zones of underground water include;Soil water zoneUnsaturated zone/ zone of non-saturationZone of intermittent saturationZone of permanent saturation
Nature of ocean water include;Ocean salinityOcean water temperatureOcean lifeOcean pollution
It advisable to wipe off any water on the microscope stage during carrying out microscopic procedure so as;To prevent refraction of lightTo prevent wetting the microscope slide
When Aluminium chloride is dissolved in water the resulting solution has a pH of 3 this is because aluminium chloride hydrolyses in water to form hydrochloric acid which is strongly acidic.