Nature

===Lakes===
[[File:Lake mapourika NZ.jpeg|thumb|[[Lake Mapourika]], New Zealand]]
{{Main|Lake}}
A lake (from Latin word ''lacus'') is a [[terrain feature]] (or [[physical feature]]), a body of liquid on the surface of a world that is localized to the bottom of [[Depression (geology)|basin]] (another type of landform or terrain feature; that is, it is not global) and moves slowly if it moves at all. On Earth, a body of water is considered a lake when it is inland, not part of the ocean, is larger and deeper than a pond, and is fed by a river.<ref>
{{cite web
|url=https://www.britannica.com/EBchecked/topic/328083/lake
|author=Britannica Online
|access-date=June 25, 2008
|title=Lake (physical feature)
|quote=[a Lake is] any relatively large body of slowly moving or standing water that occupies an inland basin of appreciable size. Definitions that precisely distinguish lakes, ponds, swamps, and even rivers and other bodies of nonoceanic water are not well established. It may be said, however, that rivers and streams are relatively fast moving; marshes and swamps contain relatively large quantities of grasses, trees, or shrubs; and ponds are relatively small in comparison to lakes. Geologically defined, lakes are temporary bodies of water.
|archive-url=https://web.archive.org/web/20080611194244/https://www.britannica.com/EBchecked/topic/328083/lake
|archive-date=June 11, 2008
|url-status=live
|df=mdy-all
}}
</ref><ref>{{cite web|title=Lake Definition|url=http://www.dictionary.com/browse/lake|website=Dictionary.com|access-date=September 6, 2016|archive-url=https://web.archive.org/web/20160905184816/http://www.dictionary.com/browse/lake|archive-date=September 5, 2016|url-status=live|df=mdy-all}}</ref> The only world other than Earth known to harbor lakes is [[Titan (moon)|Titan]], Saturn's largest moon, which has lakes of [[ethane]], most likely mixed with [[methane]]. It is not known if Titan's lakes are fed by rivers, though Titan's surface is carved by numerous river beds. Natural lakes on Earth are generally found in mountainous areas, [[rift zone]]s, and areas with ongoing or recent [[glacier|glaciation]]. Other lakes are found in [[endorheic basin]]s or along the courses of mature rivers. In some parts of the world, there are many lakes because of chaotic drainage patterns left over from the [[Last Glacial Period|last ice age]]. All lakes are temporary over geologic time scales, as they will slowly fill in with sediments or spill out of the basin containing them.

====Ponds====
[[File:Mill Pond Sunset.jpg|thumb|The Westborough Reservoir (Mill Pond) in [[Westborough, Massachusetts]]]]
{{Main|Pond}}
A '''pond''' is a [[body of water|body]] of [[Water stagnation|standing water]], either natural or human-made, that is usually smaller than a lake. A wide variety of human-made bodies of water are classified as ponds, including [[water garden]]s designed for aesthetic ornamentation, [[fish pond]]s designed for commercial fish breeding, and [[solar pond]]s designed to store thermal energy. Ponds and lakes are distinguished from streams via [[current (stream)|current]] speed. While currents in streams are easily observed, ponds and lakes possess thermally driven micro-currents and moderate wind driven currents. These features distinguish a pond from many other aquatic terrain features, such as [[stream pool]]s and [[tide pool]]s.