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Y8 - SU2.1 - Consolidating Data Representation

⏱️ Do It Now

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Lesson 1 - Summer Term 2 - Consolidating Data Representation


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📝 Data Representation Report

Instructions:

You must produce a report about the data representation topic we have just explored.

This report must present:

  1. Binary:
    • Why we use binary
    • The difference between denary and binary
    • How to convert between the two systems


  2. Hexadecimal:
    • Why we use hexadecimal
    • Key terms relating to hexadecimal numbers
    • How to convert between denary and hexadecimal (using binary as an intermediary)


  3. Either of the below (choose either images or sound)
    • (a) Images:
      • What pixels are and how they work
      • How a binary number controls the colour of a pixel
      • How hexadecimal is used in coding the colour of a pixel


    • (b) Sound:
      • The properties of sound waves
      • What a sample is and what it measures
      • An explanation of how many bits are recorded per sample, and how many samples are recorded per second


You can use the slideshows from all previous lessons to help you address each point.

Illustrative examples and graphics can be used

🎯 Learning Objectives

  • LO1: Explaining the need for and function of binary and hexadecimal number systems
  • LO2: Describing how audio OR graphical data is stored on a computer system
  • LO3: Evaluating the quality of a written report against rubric grade criteria

Self Assessment Grid



Secure and Mastery Descriptors

In explaining why binary and hexadecimal are used the report identifies the way computer switches work and the limitations humans have when interacting with binary.

Key terms around Binary and Hexadecimal should include:

  • The name given to the switches in a computer
  • The name given to the individual numbers used in a binary number
  • The name given to the small part of a binary number represented by a hexadecimal character

All conversions between number systems must be accurate

When describing images:

  • Explaining what a pixel is and what components it is made from
  • Clearly explaining how these three components work
  • Clearly explaining how a binary or hexadecimal number affects the colour produced by altering these components

When describing sound:

  • Explaining the two most important properties of a sound wave
  • Clearly explaining what is measured when each sample is recorded
  • Clearly explaining how each sample is stored on a computer and how many of these are recorded per second