Computer Studies - Junior Secondary 2 - Units of storage

Units of storage

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Term: 2nd Term

Week: 1

Class: Junior Secondary School 2

Age: 13 years

Duration: 40 minutes of 2 periods each

Date:

Subject:      Computer studies

Topic:-       Units of storage

SPECIFIC OBJECTIVES: At the end of the lesson, pupils should be able to

  1. Define computer memory and memory unit
  2. List and explain the units of storage

INSTRUCTIONAL TECHNIQUES: Identification, explanation, questions and answers, demonstration, videos from source

INSTRUCTIONAL MATERIALS: Videos, loud speaker, textbook, pictures

INSTRUCTIONAL PROCEDURES

PERIOD 1-2

PRESENTATION

TEACHER’S ACTIVITY

STUDENT’S ACTIVITY

STEP 1

INTRODUCTION

The teacher revises the previous lesson on graphic packages

Students pay attention

STEP 2

EXPLANATION

She defines computer memory and memory unit

 

Students pay attention and participates

STEP 3

DEMONSTRATION

She further lists and explains the units of storage

Students pay attention and participate

STEP 4

NOTE TAKING

The teacher writes a summarized note on the board

The students copy the note in their books

 

NOTE

UNITS OF STORAGE

A certain space is needed to store data in the computer.

Computer memory is a storage space where data and information are stored.

A memory unit is the amount of data that memory can hold.

Data can be stored in the computer through several methods using varying electronic components.

Some of these components include Hard disk, Compact disk, Flash drive, Floppy disk, Random Access Memory (RAM), etc.

Some units of storage in the computer are:

  1. Bit: Bit is an acronym that stands for Binary digit. Bit is a single unit of memory. Everything in a computer is stored as 1s and 0s. A single bit consists of 0 (zero) or 1 (one).
  2. Nibble: This is a unit of memory made up of 4 bits (half of a byte). E.g 0101, 1110, 1101, 1001, etc
  3. Byte: A byte is a unit of memory made up of 8 bits. It is the basic and the most common unit in the computer's memory. If we store a character in a computer it takes eight bits to store a character. A character can be a number, letter or symbol. E.gs of a byte are 01011101, 11110110, etc. The storage capacity is usually measured in terms of bytes.
  4. Word: A word is a collection of 32 bits.
  5. Kilobyte: A Kilobyte is denoted as (KB) and it is made up of 1024 bytes. Ie 1KB=1024 Bytes.
  6. Megabyte: A Megabyte is denoted as (MB) and it is made up of 1024 Kilobytes. i.e 1MB=1024KB. 7. Gigabyte: A Gigabyte is denoted as (GB) and it is made up of 1024 Megabyte, i.e 1GB=1024MB.
  7. Terabyte: A Terabyte is denoted as (TB) and it is made up of 1024 Gigabytes, i.e 1TB=1024GB.
  8. Petabyte: A Petabyte is denoted as (PB) and it is made up of 1024 Terabytes, i.e 1PB=1024TB
  9. Exabyte: An Exabyte is denoted as (EB) and it is made up of 1024 Petabytes, i.e 1EB=1024PB.
  10. Zettabyte: A Zettabyte is denoted as (ZB) and it is made up of 1024 Exabytes, i.e 1ZB=1024EB.
  11. Yottabyte: A Yottabyte is denoted as (YB) and it is made up of 1024 Zettabytes, i.e 1YB=1024ZB

EVALUATION:    1. Define

  1. Computer memory
  2. Memory unit

       2. List and explain five units of storage

CLASSWORK: As in evaluation

CONCLUSION: The teacher commends the students positively