The pH scale measures the concentration of how acidic or basic something is. The lower the number below 7, is acidic. Above 7 is basic. 7 is waters purest form.
Sandstone rocks<span> are most likely the result of compacting and cementing particles together.</span>
1.Water evaporates in the presence of sunlight.
(hydrosphere)
2.Volcanoes release a large amount of gases and other matter during eruption.
(lithosphere)
3.Lightning causes nitrogen molecules to be split and carried by rain.
(hydrosphere)
4.Plants release water vapor through their leaves during transpiration.
(biosphere)
Hope this helps!
