Two plus two still makes four.

Blockchain Spelling Quiz

level: upper-intermediate

You can do this quiz online or print it on paper. It tests spelling of vocabulary found in this passage on the topic of blockchains.

A passage from Wikipedia's page on blockchains and blockchain technology:

A blockchain is a growing list of records, called blocks, that are linked together using 1. a) cryptography b) cryptogarphy c) crypotography. Each block contains a cryptographic hash of the previous block, a timestamp, and transaction data (generally represented as a Merkle tree). The timestamp proves that the transaction data existed when the block was published in order to get into its hash. As blocks each contain information about the block previous to it, they form a chain, with each additional block 2. a) reinforceing b) reinforsing c) reinforcing the ones before it. Therefore, blockchains are 3. a) resistent b) resistant c) resistiant to modification of their data because once recorded, the data in any given block cannot be altered 4. a) retractively b) retroactively c) retrocatively without altering all subsequent blocks.

Blockchains are typically managed by a peer-to-peer network for use as a publicly distributed ledger, where nodes collectively adhere to a 5. a) protocol b) protacol c) protecol to communicate and 6. a) valedate b) valadate c) validate new blocks. Although blockchain records are not unalterable as forks are possible, blockchains may be considered secure by design and 7. a) exempilfy b) exemplify c) exemplifly a distributed computing system with high Byzantine fault 8. a) tolerance b) tolerince c) tolerence.

The blockchain was invented by a person (or group of people) using the name Satoshi Nakamoto in 2008 to serve as the public transaction ledger of the 9. a) cryptocurriency b) cryptocurrencey c) cryptocurrency "bitcoin". The identity of Satoshi Nakamoto remains unknown to date. The invention of the blockchain for bitcoin made it the first digital currency to solve the double-spending problem without the need of a trusted 10. a) authority b) authoriaty c) authourity or central server.

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Full text: Wikipedia on blockchains and blockchain technology (June 2021)

Contributor: Matt Errey. Matt is the author of several books including 1000 Phrasal Verbs in Context and Common English Idioms for learners, and Matt's ESL Games and Quizzes for teachers. He is also creator of WORD UP, the world's #1 EFL board game.