1. Precipitation: Rain and snow fall onto the Earth's surface.

2. Infiltration: Some of this water soaks into the ground, a process called infiltration. The rate of infiltration depends on factors like soil type, vegetation cover, and the ground's slope.

3. Percolation: The infiltrated water moves downward through the spaces between soil particles and rock fractures. This downward movement is called percolation.

4. Water Table: As water percolates, it eventually reaches a zone where all the spaces in the soil and rock are filled with water. This zone is called the saturated zone, and the top of this zone is the water table.

5. Groundwater: The water within the saturated zone is groundwater.

Essentially, groundwater is the water that has infiltrated the ground and collected below the water table.

Here are some additional points to consider:

* Aquifers: Groundwater is often stored in underground layers of rock or sediment called aquifers. These aquifers can be porous and permeable, allowing water to flow through them.

* Discharge: Groundwater can also be discharged back to the surface through springs, wells, and rivers.

* Importance of Groundwater: Groundwater is a vital resource for many communities, providing water for drinking, irrigation, and industry.

Let me know if you have any other questions!