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.
Which U.S. river has a famous 'bird's-foot' delta?
AnswerMississippi
The Mississippi's delta branches like a bird's foot into the Gulf of Mexico.
What word stands for the letter D in the NATO phonetic alphabet?
AnswerDelta
The NATO alphabet uses Delta for D.
Expert level
The Okavango Delta, which drains inland rather than into the sea, is in which country?
AnswerBotswana
The Okavango spreads into the Kalahari basin in Botswana.
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.
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