Science · Rainwater pathways
Edited by: Hitoiki Arcade / Hitoiki Learning team · Published: · Editorial policy
After rain, a puddle in a park shrinks. Has all its water immediately become groundwater? Separate entry into the ground from the later route.
Start with water’s physical state in the matter article. Here we follow liquid water and distinguish a process, an area and a layer, without guessing underground conditions from the surface.
Rainwater entering the ground is infiltration; surface runoff takes a different route. Some infiltrated water stays shallow, and some travels deeper. Entry does not mean immediate aquifer recharge.
In the first example, choose the process name. Evaporation changes liquid water to vapor; condensation changes vapor to liquid. A shrinking puddle alone does not tell you how much infiltrated.
Imagine a park map stating that surface water on one slope drains to stream A, while the opposite slope drains to B. The A-facing slope belongs to A’s catchment: the land collecting water for it, beyond the visible river surface.
A drainage divide separates these surface routes. In the second example, the answer is the catchment, not its boundary or just the river mouth. Our stipulated surface map does not establish a groundwater boundary.
Suppose the same fictional park has a saturated sand-and-gravel layer with connected spaces that transmit water. This is an aquifer example. Pores are spaces; permeability describes how readily water passes through material. No underground lake is required.
For the third example, check both storage and transmission. Spaces alone do not establish easy flow. The label fault or divide alone does not satisfy the aquifer conditions either.
Water entering flowerbed soil: what process? Infiltration. Land collecting water for A: what area? Catchment. The stipulated water-storing, transmitting layer: what layer? Aquifer. Retell the park example using those three questions.
Solve the linked examples in that order. First decide what each question asks for, then explain why the other choices do not answer it. Next, read Weather observations to distinguish rainfall depth from volume before tracing its routes.
TRY & READ
Compare the choices before opening the answer and explanation. Reading an example does not save a test answer or score.
Example 1 · Earth science: the water cycle and environment
Answer: Infiltration
Infiltration is part of the water cycle and can replenish groundwater.
Example 2 · Earth science: the water cycle and environment
Answer: A drainage basin
Drainage divides often follow higher parts of the landscape.
Example 3 · Earth science: the water cycle and environment
Answer: An aquifer
An aquifer has connected spaces through which water can flow. Pores are spaces in rock or sediment; permeability describes how readily water flows through them. Storage space and connected pathways for flow are separate properties.
Source checked: 2026-11-04
Source checked: 2026-11-04
Source checked: 2026-11-04
Topics: Earth science: the water cycle and environment. Range: Broader knowledge, General knowledge. Difficulty: Basic. These are selected initially. You can change these on the setup screen.
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