The statement that is not true regarding underground water is:
Underground water usually flows in confined channels.
Explanation:
- Underground water usually flows slowly: True. Underground water typically moves slowly through porous materials or along fractures in rock.
- Underground water usually flows in confined channels: False. Underground water does not typically flow in confined channels like rivers on the surface. Instead, it moves through the pore spaces and fractures in soil and rock, which are often unconfined.
- Underground water can create hydrothermal features of Earth's surface: True. Underground water heated by geothermal energy can create features such as geysers, hot springs, and fumaroles.
- Underground water shapes landscape through chemical processes: True. Underground water can dissolve minerals and rocks, leading to the formation of caves and karst landscapes through chemical weathering processes.