Explanation Text

Water Cycle

       Precipitation is a vital component of how water moves through earth's water cycle, connecting the ocean, land, and atmospher knowing where it rains, how much it rains and the character of the falling rain, snow, or hail allows scientists to better understand preciptition's impact on streams, rivers, surface runoff and groundwater. Freequent and detailed measurement help scientist make models od and determine changes in earth's water cycle. Hence it is quite important to understand and learn the processes of the water cycle.

Step 1: Evaporation

The water cycle starts with evaporation. It is a process where water at the surface turns into water vapors.

Step 2: Condensation

As water vaporizes into water vapor, it rises up in the atmosphere. At high altitudes the water vapors changes into very tiny particles of ice /water droplets because the temperature at high altitudes is low.

Step 3: Sublimation

Apart from evaporation, sublimation also contributes to water vapors in the air. Sublimation is a process where ice directly converts into water vapors without converting into liquid water. T

Step 4: Precipitation

The clouds (condensed water vapors) then pour down as precipitation due to wind or temperature change. This occurs because the water droplets combine to make bigger droplets. Also when the air cannot hold any more water, it precipitates. These water droplets fall down as rain. If the temperature is very low (below 0 degrees), the water droplets fall as snow. Water also precipices in the form of drizzle, sleet and hail. Hence water enters lithosphere.

Step 5: Transpiration  

As water precipitates, some of it is absorbed by the soil. This water enters into the process of transpiration. Transpiration is a process similar to evaporation where liquid water is turned into water vapor by the plants. 

Step 6: Runoff

As the water pours down (in whatever form), it leads to runoff. Runoff is the process where water runs over the surface of earth. When the snow melts into water it also leads to runoff.  

Step 7: Infiltration

Some of the water that precipitates does not runoff into the rivers and is absorbed by the plants or gets evaporated. It moves deep into the soil. This is called infiltration. The water seeps down and increases the level of ground water table. It is called pure water and is drinkable. The infiltration is measured as inches of water-soaked by the soil per hour.

Why Do The Season Change

       It has nothing to do with sun - earth distance. It's a wrong concept. Earth's distance through out the year doesn't make much different to our weather. Earth's exist is titled out an argle of 23,5 degrees. But, the imagenary exist always points in same direction. So, through out the year, different parts of earth get the sun's direct rays. And that is the reason why we have different season.