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Why Do Computers Use Binary?

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  • 7 questions
  • 21 marks
  • about 30 minutes
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Question types: short answer, multiple choice, true or false, fill the gap, matching.

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Which of these everyday devices is the BEST example of something with only TWO clear states, like a transistor?

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About this resource

Computing — Binary & the Language of Computers, Lesson 1. Why computers represent everything using just two states (electricity on/off, transistors as switches), what a bit is, how bits combine, and an intro to bytes.

11 slides.

Lesson outline

  1. Do Now — Retrieval
  2. Everything Is Electricity
  3. Hinge Check — Why Only Two States?
  4. Meet the Transistor
  5. How Many Values Can Bits Make?
  6. Quick Check — Bits Combining
  7. From Bits to Bytes
  8. Main Activity — Match the Key Terms
  9. Plenary — Back to Our Objectives
Unit bundleBinary
Part of: Binary: the whole unitEvery resource in the unit in one zip.

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