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ICT Class 7 - Memory Storage-Devices Notes

Comprehensive study notes for Class 7 - Memory Storage-Devices olympiad preparation

Memory and Storage Devices

Welcome to the chapter on Memory and Storage Devices for Class 7. In this chapter, you will learn about different types of memory in a computer, how data is stored, and the devices used for storage. By the end of this chapter, you will understand how computers remember and save information!

Introduction

Computers need memory and storage to work. Memory helps the computer remember things while it is working. Storage devices save data for later use.

Types of Memory

  • RAM (Random Access Memory): Temporary memory. It stores data only while the computer is on.
  • ROM (Read Only Memory): Permanent memory. It stores important instructions for the computer.

Storage Devices

  • Hard Disk: Main storage device inside the computer. Stores large amounts of data.
  • SSD (Solid State Drive): Faster and newer type of storage device.
  • CD/DVD: Optical discs used to store music, videos, and files.
  • Pen Drive/USB Drive: Small, portable device for storing and transferring data.
  • Memory Card: Used in cameras, phones, and tablets to store photos and videos.
  • External Hard Disk: Used for backup and extra storage outside the computer.

Why Do We Need Storage Devices?

  • To save documents, pictures, music, and videos.
  • To transfer files from one computer to another.
  • To keep backup copies of important data.

Fun Activity: Find Storage Devices at Home!

Look for pen drives, memory cards, or CDs at home. Ask your family how they use these devices.

Summary

  • Memory helps computers work fast and remember things for a short time.
  • Storage devices save data for long-term use.
  • There are many types of storage devices for different uses.

Practice Questions

  1. Name two types of computer memory.
  2. What is the use of a pen drive?
  3. Which device is used to store photos in a camera?
  4. What is the difference between RAM and ROM?
  5. Why do we need external hard disks?

Challenge Yourself

  • List three storage devices you have used.
  • Draw and label a hard disk, pen drive, and memory card.

Did You Know?

  • The first hard disks were as big as a washing machine!
  • Modern SSDs are much faster than old hard disks.

Glossary

  • Memory: Helps the computer remember things while working.
  • Storage Device: Saves data for later use.
  • RAM: Temporary memory.
  • ROM: Permanent memory.
  • SSD: Fast storage device.

Answers to Practice Questions

  1. RAM and ROM.
  2. To store and transfer files.
  3. Memory card.
  4. RAM is temporary, ROM is permanent.
  5. For backup and extra storage.

Explore different memory and storage devices to understand how computers save your work!

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