What is a supply chain?
AnswerThe steps and companies that move a product from raw materials to customer
It covers sourcing, making, shipping and selling.
Challenge · Facts & stats
Chain facts & stats
7 fact-checked facts about chains of all kinds: food chains, supply chains, chain reactions and mountain chains, each with the reason behind it. 5 more are in today's round and join this page after it closes.
The basics
Armor made of small linked metal rings is called what?
AnswerChain mail
Chain mail was widely used in medieval Europe.
Going deeper
In nuclear fission, which particles keep a chain reaction going?
AnswerNeutrons
Each fission releases neutrons that can split more nuclei.
What is the longest continental mountain chain in the world?
AnswerAndes
The Andes run about 7,000 km along South America.
The Hawaiian island chain was formed mainly by what?
AnswerVolcanoes over a hotspot
The Pacific Plate moves over a volcanic hotspot.
Expert level
Who led the team that achieved the first controlled nuclear chain reaction in 1942?
AnswerEnrico Fermi
Chicago Pile-1 went critical under Fermi's direction.
In a Markov chain, the next state depends on what?
AnswerOnly the current state
This memoryless property defines a Markov chain.
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