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Create a quiz question for high school students about blockchain, including a hint for the correct answer.

2 months ago


What is blockchain?

Hint: It is a decentralized and transparent technology that forms the foundation for cryptocurrencies.



Blockchain is a decentralized and transparent technology that allows for secure and immutable record-keeping. It is often associated with cryptocurrencies like Bitcoin, but its applications extend beyond digital currencies.

At its core, blockchain is a distributed ledger that records transactions across multiple computers, known as nodes. Each transaction is bundled into a block and added to a chain of previous blocks, creating a chronological and unalterable record of all transactions. This decentralized nature of blockchain ensures that no single entity has control over the entire system, making it resistant to tampering and hacking.


One of the key features of blockchain is transparency. Every transaction recorded on the blockchain is visible to all participants. However, the identities of the participants are typically pseudonymous, meaning they are represented by unique cryptographic addresses instead of real names. This pseudonymity helps protect privacy while still maintaining transparency.


To illustrate the concept of blockchain, let's consider an example:

Imagine a classroom where students need to submit their assignments to the teacher. Instead of collecting physical papers, the teacher decides to use a blockchain-based system. Each student's assignment is considered a transaction, and all the transactions are bundled into a block. Once the block is full, it is added to the chain, creating an immutable record of all the assignments.

Now, if a student wants to modify their assignment after submission, it would require the consensus of the entire class. This is because changing one block would affect the hash of subsequent blocks, making the tampering evident to all participants. This immutability ensures the integrity of the assignments and prevents fraud.

Blockchain technology has a wide range of applications beyond cryptocurrencies. It can be utilized in supply chain management, voting systems, healthcare records, and more, where secure and transparent record-keeping is crucial.


  • Tapscott, D., & Tapscott, A. (2016). Blockchain revolution: how the technology behind bitcoin is changing money, business, and the world.
  • Narayanan, A., Bonneau, J., Felten, E., Miller, A., & Goldfeder, S. (2016). Bitcoin and cryptocurrency technologies: a comprehensive introduction.

Remember, understanding blockchain is important as it has the potential to revolutionize various industries and shape the future of technology.

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