A river delta forms where a river meets what?
AnswerA larger body of water, like a sea
Rivers slow down entering larger water and drop sediment.
Nature · Facts & stats
Delta facts & stats
7 fact-checked facts about river deltas and the greek letter delta, each with the reason behind it. 5 more are in today's round and join this page after it closes.
The basics
Delta is which letter of the Greek alphabet?
AnswerFourth
Alpha, beta, gamma, then delta.
Going deeper
In math and science, the symbol Δ often means what?
AnswerA change in a quantity
Δx is read as the change in x.
What material builds up a river delta?
AnswerSediment carried by the river
Deltas grow from sand, silt and clay the river deposits.
The Ganges-Brahmaputra delta is shared mainly by which two countries?
AnswerIndia and Bangladesh
It is one of the largest deltas in the world.
Expert level
Which ancient Greek writer is credited with calling the Nile's mouth a 'delta'?
AnswerHerodotus
Herodotus compared the triangular Nile mouth to the letter delta.
The Mekong River's delta lies mostly in which country?
AnswerVietnam
The Mekong reaches the sea in southern Vietnam.
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