water cycle, also known as the hydrologic cycle, describes the continuous movement of water on the Earth's surface as well as above and below it.Although the balance of water on Earth remains virtually unchanged over time, individual water molecules can come and go in an atmosphere of it.Water moves, for example from a river or the ocean from the ocean into the atmosphere via physical processes such as evaporation, condensation, precipitation, infiltration, runoff and groundwater flows via.The water passes through different phases: liquid, solid (ice) and gaseous (vapor).
water cycle includes heat transfer, which leads to temperature changes.For example, when water vaporizes, it absorbs heat from the environment and cools it.When it condenses, it gives off heat and heats the environment.This heat affects the climate.The water cycle in nature is also associated with geological processes on Earth (erosion and sedimentation).And finally, thanks to his life and maintained the stability of ecosystems in the world.
Description
water cycle in nature for children begin to describe even in primary school, so everyone knows that the sun, thanks to which it occurs, heats water in oceans and seas.The water is evaporated and fed as a vapor into the air.Ice and snow can sublimate directly into water vapor, bypassing the liquid phase.Also, water is evaporated from the plants and soil.
updraft rising steam into the atmosphere where cooler temperatures cause it to condense into clouds.Air streams carry steam worldwide, clouds collide, grow and the water drops from the upper atmosphere in the form of precipitation.Some of them can be stored in the form of ice caps and glaciers, which store frozen water for thousands of years.Most of the water falls back into the oceans or onto land as rain, forming a runoff.Some runoff into rivers, and then - in seas and oceans.Stormwater and groundwater partially collected in freshwater lakes.However, most of the absorbed and infiltrated into the ground: penetrates deep into the ground and replenishes aquifers, which are reservoirs of fresh water.These horizons can be located close to the surface and the water can seep back - so formed springs.However, over time the water returns to the ocean, where it all began.
process by which it happens the water cycle:
Precipitation
Most precipitation falls as rain.Other: snow, hail, fog, sleet and cereal.The annual rainfall of about 505,000 cubic kilometers of water in the form of precipitation.
Interception precipitation
Precipitation, which were intercepted by foliage plants, eventually evaporates back into the atmosphere and does not fall to the ground.
Meltwater
Stoke by melting snow.
Stoke
various ways by which water moves through the ground.It can be both surface runoff and groundwater.Water can seep into the ground, evaporate into the air, stored in lakes and reservoirs or used for agricultural and other purposes.
Infiltration
infiltration of water from the surface of the ground.
underground streams
flow of water underground, in the vadose zone and aquifers.Groundwater can return to the surface or eventually seep into the ocean.Groundwater tends to move slowly and replenished slowly, so that they can remain in aquifers for thousands of years.
Evaporation
transformation of water from liquid to gaseous state at which it moves from the ground or water in the atmosphere.The energy source for the evaporation is primarily solar radiation.Total evaporation - about 505,000 cubic kilometers of water per year.
Sublimation
transition directly from the solid phase (snow or ice) to water vapor.
deposition
This conversion of water vapor directly into ice.
advection
movement of water - in solid, liquid or gaseous state - through the atmosphere.
Condensation
transformation of water vapor to liquid water droplets in the air, forming clouds and fog.
Evaporation
Out of water vapor from plants and soil into the air.
Seepage
horizontal flow of water through the soil and rocks under the influence of gravity.
water cycle in nature is due to solar energy.86% of the global evaporation occurs from the surface of the ocean.
water cycle in the biosphere - a biogeochemical cycle, asdrains are responsible for almost all the movements of eroded sediment and phosphorus from land to water bodies.
