Editing Water cycle
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== Frequently Asked Questions == | == Frequently Asked Questions == | ||
=== Why rain water is not salty when it is evaporated from the ocean that has salty water? === | === Why rain water is not salty when it is evaporated from the ocean that has salty water? === | ||
− | The salty ocean water that contains sodium and chloride ions do not have enough energy to evaporate at the standard temperature at the surface of the ocean. Therefore, water that evaporates from the oceans as vapour will only contain | + | The salty ocean water that contains sodium and chloride ions that do not have enough energy to evaporate at the standard temperature at the surface of the ocean. Therefore, water that evaporates from the oceans as vapour will only contain water molecules in it. The same happens in [[distillation]] of water. |
=== What causes acid rain? === | === What causes acid rain? === | ||
[[Acid rain]] is caused when the rainwater that falls from the clouds reacts with the compounds like [[nitrogen oxide]] and [[sulfur dioxide]] in the air. These compounds decrease the [[pH]] value of the rain and make it more acidic in nature. Naturally, rain is a little acidic as it reacts with [[carbon dioxide]] in the atmosphere to form [[carbonic acid]]. But it is due to the industrial revolution and other human activities like [[fossil fuel]] burning, the concentration of the other pollutants like sulfur dioxide and nitrogen oxide have increased to cause rain that is highly acidic in nature. Other sources of these pollutants include natural events like [[lightning]] and volcanic eruptions. | [[Acid rain]] is caused when the rainwater that falls from the clouds reacts with the compounds like [[nitrogen oxide]] and [[sulfur dioxide]] in the air. These compounds decrease the [[pH]] value of the rain and make it more acidic in nature. Naturally, rain is a little acidic as it reacts with [[carbon dioxide]] in the atmosphere to form [[carbonic acid]]. But it is due to the industrial revolution and other human activities like [[fossil fuel]] burning, the concentration of the other pollutants like sulfur dioxide and nitrogen oxide have increased to cause rain that is highly acidic in nature. Other sources of these pollutants include natural events like [[lightning]] and volcanic eruptions. |