Why do computers use binary?
I can explain why computers use binary to represent all data and instructions.
Why do computers use binary?
I can explain why computers use binary to represent all data and instructions.
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Lesson details
Key learning points
- Computers use binary to represent all data and instructions.
- Binary is a number system consisting of 1s and 0s.
- Binary can be represented by two-state electrical signals within circuits.
- A transistor that is “on” represents a 1; a transistor that is “off” represents a 0.
Keywords
Data - raw facts, such as numbers or text, presented without any meaning
Binary - a number system that uses the digits 0 and 1 to represent data
Instruction - directions on how to carry out a specific task
Transistor - a tiny electronic switch controlled by electricity.
Common misconception
Computers use binary for data and instructions but they can use other number systems just as easily.
Computers have to use binary as they are powered by electrical circuits which contain transistors which can be switched on and off using electricity. Using other number systems would require more complex circuitry.
Equipment
Pupils do not require any specific equipment for this lesson.
Licence
Lesson video
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Prior knowledge starter quiz
6 Questions
Q1.People may write a message for a number of reasons. Which of these is NOT a reason to write a message?
Q2.Written messages can appear in many forms. Put these forms of writing into date order, from oldest to most recent.
Q3.A computer can store and instructions.
Q4.Select all the ways that a light bulb can appear.
Q5.What is the next number in this sequence: 1, 2, 4, 8…?
Q6.What does the word 'binary' mean?
Assessment exit quiz
6 Questions
Q1.Match the words to the correct description.
a number system that uses the digits 0 and 1 to represent data
raw facts, like numbers or text, presented without context or meaning
directions on how to carry out a specific task
a small electronic switch controlled by electricity