Compression

KS3 Computer Science: Compression

This module contains:

An editable PowerPoint lesson presentation
Editable revision handouts
A glossary which covers the key terminologies of the module
Topic mindmaps for visualising the key concepts
Printable flashcards to help students engage active recall
A quiz with answer key to test knowledge and understanding of the module

Compatible with the following examination boards

Download →

File handling is one of the primary functions of a computer system. Based on the type of data that needs to be stored, several types of file formats are available. Each file format occupies certain storage space. An image file with good quality occupies around 1 MB, and an uncompressed 1-minute audio file occupies around 11 MB. A CD will be able to occupy approximately 77 minutes of this audio. Compression methods are used to reduce the size of the files.
Compression is also helpful in reducing the download time of an image, audio and video from the internet.

This KS3 Computer Science module introduces compression to your students, explaining: