What is a water cycle explain?
The water cycle shows the continuous movement of water within the Earth and atmosphere. Liquid water evaporates into water vapor, condenses to form clouds, and precipitates back to earth in the form of rain and snow. Water in different phases moves through the atmosphere (transportation).
How long does the water cycle take?
A drop of water may spend over 3,000 years in the ocean before evaporating into the air, while a drop of water spends an average of just nine days in the atmosphere before falling back to Earth. Water spends thousands to hundreds of thousands of years in the large ice sheets that cover Antarctica and Greenland.
Does the water cycle ever stop?
The water cycle (also called the hydrologic cycle) is the continuous movement and storage of water across the earth in all forms: liquid, solid (ice) and gas (water vapor). There is no start or end to the water cycle, but for explanation purposes we will start at the sun. If heat is added to ice, it melts.
How long can water remain in aquifers?
Estimated depth and residence time of the world’s water supply
| Water | Equivalent depth (meters) | Residence Time |
|---|---|---|
| Groundwater | 120 | ~2 weeks-10,000 years |
| Ice caps/Glaciers | 60 | 10-1000 years |
| Atmospheric water | .025 | ~10 days |
| Biospheric water | .001 | ~1 week |
Where in the water cycle does water stay the longest?
Apart from the oceans and ice caps, the greatest volume of water is underground, stored in porous rocks below the Earth’s surface. The shallower underground water moves quite quickly through the cycle and is fresh water, so it can be used for water resources.
Does water in an aquifer stay there forever?
Groundwater does not stay underground forever, and it does not lie still waiting for us to draw it from a well. Precipitation becomes surface water, soil moisture, and groundwater. Groundwater circulates back to the surface, and from the surface all water returns to the atmosphere through evaporation and transpiration.