1310004-CSGK-G4-Integrated Book-Computers+GK-FY

CLASS 4 COMPUTERS & GENERAL KNOWLEDGE Student Name: __________________________ Class: __________________________ Section: __________________________ Roll No: __________________________ GK-3.indb 3 06/02/17 5:04 pm

INDIVIDUALISED PROGRESSIVE LEARNING PROGRAM Because no two students are the same. IMAX is India’s only customised content and educational assessment company 350 Published Books Team of IITians & PhDs IMAX has authored about 350 publications Content development and automation are which are used by more than 3,00,000 led by a team of IITians, data scientists and students. education experts. Workshops 16 Lakh Assessments IMAX has conducted teacher training IMAX has conducted more than 16,00,000 workshops for more than 8,000 teachers. assessments across 11 states in the last 7 years. Copyright © 2017 BGM Policy Innovations Pvt Ltd Published by BGM Policy Innovations Pvt Ltd This book is sold subject to the condition that it shall not, by way of trade or otherwise, be lent, resold, hired out or circulated in any form, without the publisher’s prior, written consent. All rights reserved. No part of this publication, including but not limited to, the content, the presentation layout, session plans, themes, key type of sums, mind maps and illustrations, may be reproduced, stored in a retrieval system or transmitted, in any form or by any means(electronic, mechanical, photocopying, recording or otherwise), without the prior, written permission of the copyright owner of this book. This book is meant for educational and learning purposes. The author(s) of the book has/ have taken all reasonable care to ensure that the contents of the book do not violate any copyright or other intellectual property rights of any person in any manner whatsoever. In the event the author(s) has/have been unable to track any source and if any copyright has been inadvertently infringed, please notify the publisher in writing for any corrective action. Some of the images used in the books have been taken from the following sources: www.freepik.com, www.vecteezy.com, www.clipartpanda.com Creative Commons Attribution This book is part of a package of books and is not meant to be sold separately. For MRP, please refer to the package price. GK-3.indb 3 06/02/17 5:04 pm

GK-3.indb 3 06/02/17 5:04 pm

GK-3.indb 3 06/02/17 5:04 pm

TABLE OF CONTENTS Lesson Page No. COMPUTER BASICS 1. EARLY COMPUTERS 1–8  Early Counting  History of Computers PARTS OF A COMPUTER 2. THE CENTRAL PROCESSING UNIT 9 – 17  CPU Basics  Functional Units of The CPU OPERATING SYSTEM 3. WELCOME TO WINDOWS 18 – 29 30 – 40  About Windows  Drives, Folders and Files in Windows 4. CUSTOMIZING THE DESKTOP  Desktop Components  Magic Desktop DRAWING AND TYPING 41 – 51 5. MORE ON MS PAINT  Features of Paint  Editing Images Computer Grade 4 1.indb 1 11/02/17 2:53 pm

Lesson Page No. 52 – 62  Text Tools 63 – 72  Image Menu- Select 73 – 83  Image Formatting  Brush Types 84 – 93 6. EDITING TEXT IN MS WORD  Basic Editing Tasks  Find and Replace Text  Undo and Redo an Action 7. MS WORD FEATURES  Bullets and Numbering  Spelling & Grammar  Change Case FUN WITH LOGO 8. ADDITIONAL LOGO COMMANDS  More on LOGO Commands  PRINT Command  Arithmetic With LOGO  REPEAT Commands INTERNET AND MULTIMEDIA 9. WORLD OF INTERNET AND MULTIMEDIA  What is the Internet?  What Can We Do on the Internet?  Requirements to Connect  Terms Related to the Internet  Multimedia Computer Grade 4 1.indb 2 11/02/17 2:53 pm

1 EARLY COMPUTERS Hello, Friends! Remember me? I am Clicko. Today, we will learn about the history and development of computers. Let Us Start A Computer is a machine used for a calculation or a computation, but actually, it is much more than that. It would be difficult to imagine the world without computers. But there was a time when there was no computer at all. The Computer is a modern invention. To know how a computer works, we learned the various terms such as Data, Processing and Information. Let Us Do 1: Do you remember the steps to complete the process? Write the correct words in the given blanks (withdrawing money from an ATM) _______________ _______________ _______________ Computer Grade 4 1.indb 1 1 11/02/17 2:53 pm

In this lesson We will learn how it all began and explore the different types of devices invented before the computer. A Long time ago, people had to work hard to get something they needed. They always looked for ways to make their work easier and faster. Have you ever wondered how the computer was invented? The computer was not invented by a single person. The term “computer” was given to the people who had to do a lot of calculations. They had to repeat the same type of calculations all the time. Therefore, scientists tried to invent a machine that can perform the task of computing fast and accurate. The machines we call computers today are the result of many years of work by many people. Let us explore the history of computers from early days. Early Counting In early days when our ancestor used to reside in the cave. They used their fingers, stones and sticks for counting. They also made scratches on a wall to keep count of their animals. Sometimes they even tied knots in a rope to record information. Do You Know? The word digit (The numbers 0-9 are called digits) actually refers to a finger or toe. The first tool used by man to count were his own finger. 2 11/02/17 2:53 pm Computer Grade 4 1.indb 2

Let Us Do 2: Take a calculator and try the following sums. 1. 5 + 7 X 4 = ________________ 2. 12 / 3 + 5 = ________________ 3. 15 - 5 X 2 = ________________ History of Computers Let us have a look at the history and early computing devices developed by man. The Abacus The abacus is the first counting device ever made. About 4000 years ago, the Chinese invented the Abacus. This device has a wooden frame. It is divided into two parts by Abacus a horizontal bar. These parts have vertical wires with beads on them. These beads are used for counting and calculating. Napier’s Bones About 400 years ago, John Napier, a Scottish mathematician, invented a calculating device. It was made of a set of rods carved from bones. Hence, it was named as Napier’s Bones. The Pascaline It is the first mechanical calculator in the world Napier’s Bones. Do you know why it is called Pascaline? The Pascaline was invented by a French mathematician called Blaise Pascal in 1642. And hence it is named after him. The Pascaline is made up of wheels and gears. It is used for adding numbers quickly. Meters that are used in Taxis nowadays are an example of Pascaline. Pascaline and Blaise Pascal Computer Grade 4 1.indb 3 3 11/02/17 2:53 pm

Fun Fact Blaise Pascal created the Pascaline (or Pascal’s Calculator) to help his father. He was a tax collector, in his endless and exhausting calculations for his work. Blaise was not even 19 at that time. The Analytical Engine In 1833, an English mathematician Charles Babbage invented the machine which could do complicated calculations and store the results at each stage. It was called the Analytical Engine. It was the first mechanical calculator. This machine laid the basis for the modern computer. For this great invention of the computer, Sir Charles Babbage is also known as the father of the computer. Analytical Engine and Charles Babbage Lady Ada Augusta Lovelace She is also known as Lady Ada. She was the first to introduce the concept of programming. She created the set of instructions for the analytical engine to follow. This set of instructions was called the program. Due to this, she was regarded as the ‘First Computer Programmer’ in the world. The Tabulating Machine Tabulating Machine In 1890, Herman Hollerith an American statistician invented a machine called the Tabulating machine. This machine is capable of reading data, processing it and giving the desired output. It is based on IPO model. This machine is capable of reading both numbers and letters. 4 11/02/17 2:53 pm Computer Grade 4 1.indb 4

Glossary 1. C harles Babbage- British Mathematician, known as “Father of Computers”. 2. Pascaline – first mechanical calculator in the world invented in 1642 3. A  bacus – oldest calculating device used about 4000 years ago. 4. N  apier’s Bones – series of rods that had squares inscribed in them; used for multiplication and division. 5. A  nalytical Engine – machine created by Charles Babbage to perform calculations; powered by steam. Teacher’s Notes • D  iscuss with students different examples of the computing devices that they see in their daily lives. • Have a class quiz on the terms Abacus, Analytical Engine and Pascaline. Student’s Notes • Make a chart describing the ways people in olden days used to calculate. • Give three examples of early computing machines. EXERCISE 1. Multiple Choice Questions a) Who is called the father of computers? A) Paul Allen B) Bill Gates C) Charles Babbage D) John Napier b) Who is known as the world’s first programme A) Lady Ada Lovelace B) Charles Babbage C) Bill Gates D) Lady Mary Computer Grade 4 1.indb 5 5 11/02/17 2:53 pm

c) Which of the following was the first mechanical calculator? A) Analytical Engine B) Napier’s Bones C) Jacquard’s Loom D) Pascaline Calculator 2. True or False a) Charles Babbage was a mathematician. __________ b) Herman Hollerith invented the Analytical Engine. __________ c) Pascaline was invented in 1642. __________ 3. Fill in the blanks a) The oldest computing machine is ______________________. b) ______________ is used for calculating fares in taxis. c) John Napier was born in _______________. 4. Match the following a) Inventor of Pascaline i) b) Napier’s Bones ii) c) Analytical Engine iii) d) Abacus iV) 6 11/02/17 2:53 pm Computer Grade 4 1.indb 6

5. Very Short Answer Questions a) What is the full name of Lady Ada? Ans. _________________________________________________________________________ b) What did John Napier invent? Ans. _________________________________________________________________________ 6. Short Answer Questions a) What did Blaise Pascal invent? What was the purpose of this invention? Ans. _________________________________________________________________________ b) What is a Tabulating Machine? Ans. _________________________________________________________________________ 7. Long Answer Question Write a short note on Charles Babbage and his contribution to the modern world. Ans. _________________________________________________________________________ _______________________________________________________________________________ _______________________________________________________________________________ _______________________________________________________________________________ 8. Picture Based Question Identify the following pictures and write the names. Computer Grade 4 1.indb 7 7 11/02/17 2:53 pm

ACTIVITY In the below box, there are many words which you have read in this lesson. How many can you find QWA Z T Y R U I ON P L K J H G F Z A B A C U S X CV A B N ML K J H A S D D F GHJ K L P Z X C V B N M QA Z A X A L GOR I T H MCV B N A N A L Y T I CA L E NGI N E WR U I OOWE R T A Z R R T U I OP F X C V V C H AR L E S B A B B A GE J K L E G A Z H J K B CV B N A S D E T Y L R T U I OP OU I OGF X R QD GA C V B N E H N X CV J H Z C P A S CA L I N E S E J K L N MD H AZ S E C V B NAZ S CV B B N V Y 8 11/02/17 2:53 pm Computer Grade 4 1.indb 8

2 THE CENTRAL PROCESSING UNIT Hello, friends. You all know about the basic parts of a computer. But do you know the functions of a CPU? Let us find out. Let Us Start Let us recall the history of computers by rearranging the jumbled words. 1. B C U A S A __________________________________ 2. E H S R A C L E A G B A B B _________________________________________________________ 3. C A I S A L N E P ____________________________________________ In the previous lesson, we have learnt that compared to those early machines, today’s computers are amazing. They are not only thousands of times faster; they can also fit on the desk, on your lap, or even in your pocket. Computers work through an interaction of hardware and software. Hardware refers to the parts of a computer that you can see and touch, including the case and everything inside it. The most important piece of hardware is a tiny rectangular chip inside your computer and is called the Central Processing Unit (CPU), or Microprocessor. Computer Grade 4 1.indb 9 9 11/02/17 2:53 pm

In this lesson We will learn about the functions and the functional units of the Central Processing Unit. Like human beings, the computer also needs a brain to work. At the core of every computer is a device roughly the size of a large postage stamp. This device is known as the Central Processing Unit or CPU. The CPU of a computer is a piece of hardware that carries out the instructions of a computer program. This program will take inputs from an input device, process it and give the results to an output device. Every instruction has to go through the CPU. So let’s say you press the letter ‘k’ on your keyboard and it appears on the screen - the CPU is what makes this possible. CPU’s aren’t only found in desktop or laptop computers, many electronic devices now depend on them for their operation. Mobile Phones, DVD Players and Washing Machines are examples of equipment that has a CPU. CPU Basics The CPU is often referred to as a processor, central processor, or microprocessor. A computer’s CPU handles all Instructions it receives from Hardware and Software running on the computer. Do You Know? When the CPU of a computer is contained on a chip, it is called a Microprocessor. 10 11/02/17 2:53 pm Computer Grade 4 1.indb 10

History The CPU was first developed at Intel by Federico Faggin and Ted Hoff in 1970. The first processor released by Intel was the 4004 processor. The power of a computer is its Central Processing Unit. More power in the CPU means faster calculations and thus a faster computer. CPU Functions The main function of the CPU is processing instructions given to the computer. The functions of the CPU of a computer are as follows: • The CPU reads and executes program instructions. • It coordinates the activities of the computer system. • It controls the operation of all parts of the computer. • It stores data, intermediate results and instructions (program). Functional Units of the CPU The computer system essentially comprises three important parts – Input device, Central Processing Unit (CPU) and the Output device. The CPU itself is made of three components namely: • The Memory or Storage Unit • The Control Unit (CU) • The Arithmetic Logic Unit (ALU) The Machine cycle explains clearly the functions of these components individually. Figure 2.1 Basic structure of a CPU Figure 2.2 Stepwise Functions Computer Grade 4 1.indb 11 11 11/02/17 2:53 pm

Let’s learn all the units here. The Memory or Storage Unit This unit can store instructions, data and intermediate results. It supplies information to the other units of the computer when needed. It is also known as an internal storage unit or main memory or primary storage or Random Access Memory (RAM). The Control Unit This unit controls the flow of information through the processorand coordinates the activities of the other units within the processor. It is the “Brain within the Brain”, as it controls what happens inside the processor, which in turn controls the rest of the PC. The Memory or Storage Unit An arithmetic logic unit (ALU) is a major component of the central processing unit of a computer system. This unit consists of two sections. • Arithmetic Section • Logic Section 12 11/02/17 2:53 pm Computer Grade 4 1.indb 12

Arithmetic Section Logic Section This section performs This deals with logic and calculations on the data. comparisons. For example, it E.g. 3 + 2 = 5. The function of works out if one value is greater, arithmetic section is to perform less than or equal to another. arithmetic operations like The function of logic section addition (+), subtraction is to perform logic operations such as comparing, selecting, (-),multiplication(*) and division matching and merging of data. (/). All complex operations are Its size affects speed, power and done by making repetitive use capability. of above operations. Glossary 1. Microprocessor- It is a silicon chip also known as CPU. 2. C entral Processing Unit- Piece of hardware that carries out instructions of acomputer program. 3. H ardware- The machines, wiring, and other physical components of acomputer or other electronic system. 4. M emory unit- This unit stores instructions, data and supplies information tothe other units of the computer. 5. C  ontrol unit- This unit instructs the memory, arithmetic/logic unit and input and output devices how to respond to a program’s instructions. Computer Grade 4 1.indb 13 13 11/02/17 2:53 pm

Teacher’s Notes • D  iscuss with the students the importance of a Central Processing Unit in our computers. • Ask the students about the various functions of the Central Processing Unit. • Have a class quiz on the functions performed by the Memory unit, the control unit and the Arithmetic and Logic unit. Student’s Notes • Make a chart describing the functions of components in a CPU. • W  ith the help of chart papers and sticks make a model of Intel’s first processor - 4004 processor. EXERCISE 1. Multiple Choice Questions a) The first processor released by Intel was known as A) 4003 processor B) 4005 processor C) 4004 processor D) 4100 processor b) Microprocessor is also known as the B) Central Processing Unit A) Arithmetic unit D) Random Access Memory C) Memory Unit c) This section performs the calculations based on the data. A) Memory unit B) Logic section C)Arithmetic section D) Control unit 14 11/02/17 2:53 pm Computer Grade 4 1.indb 14

2. True or False a) The CPU is known as the brain of the computer.________________ b) The ALU carries out the logical processing. _____________________ c) The control unit consists of Arithmetic and Logic unit. ____________ 3. Fill in the blanks a) ____________________ and _______________________ are alternate names for the main memory. b) The __________________ is that part of the CPU which controls and Coordinates the activities taking place in the computer system. c) The RAM is called ___________________ memory. 4. Match the following a) First processor i) b) Brain of the computer c) Main memory ii) iii) Brain within the brain d) Control Unit iv) Random Access Memory Computer Grade 4 1.indb 15 15 11/02/17 2:53 pm

5. Very Short Answer Questions a) Who invented the first processor and where? Ans. _________________________________________________________________________ b) Write an alternate name for the Central Processing Unit. Ans. _________________________________________________________________________ 6. Short Answer Questions a) W  rite one difference between Arithmetic unit and Logic unit. Ans. _________________________________________________________________________ ______________________________________________________________________________ b) Mention the three main components of a Central processing unit. Ans. _________________________________________________________________________ _______________________________________________________________________________ 7. Long Answer Question Mention any two functions of a Central Processing Unit. Ans. _________________________________________________________________________ ______________________________________________________________________________ ______________________________________________________________________________ 16 11/02/17 2:53 pm Computer Grade 4 1.indb 16

8. Picture Based Question Label the following diagram to complete the structure of the CPU. ACTIVITY Help Tina to find the following words in the table. CPU MEMORY RAM DATA INTEL CHIP Z J N R AM I P D I OPGT N M BCPU J U T K Y HG T HD E C S I DA T A L M NPA T D S H N M E MO R Y B S Computer Grade 4 1.indb 17 17 11/02/17 2:53 pm

3 WELCOME TO WINDOWS Hello, Friends! Do you remember about the different Operating Systems used in the computers? Let us see which is the most common OS. Let Us Start We already know that you and your computer communicate using an Operating system. The operation of a computer is controlled by the software known as the operating system (OS). This software is as important to the running of a computer as its hardware. It lies between the hardware and the software. It tells the computer how to do its work and run its functions. Let Us Do 1: Identify the operating systems you learned. Try to find out the names of all and write in the given spaces. 18 11/02/17 2:53 pm Computer Grade 4 1.indb 18

In this lesson We will learn about different versions of Windows Operating system. We will also get to know about the drives, files and folders. About Windows Microsoft introduced an operating system environment named Windows on November 20, 1985. It consists of several families of Operating Systems. Windows is a GUI. It allows operating a computer easily without having to memorise difficult commands. This makes Windows a user-friendly operating system unlike other operating systems such as DOS (Disk Operating System) where we had to learn a lot of commands. Do You Know? Microsoft was founded by Bill Gates and Paul Allen on April 4, 1975. Let’s have a look at the different versions of Windows. Computer Grade 4 1.indb 19 19 11/02/17 2:53 pm

Windows 95 Features Introduced taskbar and Start button. Improved the way a user navigates. Windows 95 (August 24, 1995) Do You Know? Windows 95 was the first operating system to have a “Start menu” and “start button”. Windows 98 Features Windows 98 (25 June 1998) Easy in finding information 11/02/17 2:53 pm Support for DVD disc and USB devices. 20 Computer Grade 4 1.indb 20

Windows ME Features Internet Explorer 5.5, Windows Media player 7, Windows Movie maker software. Windows ME (14 September 2000) Windows XP Features Stable, usable and fast. Simple navigating the Start menu, Taskbar and Control Panel. Windows XP (25 October 2001) Fun Fact Windows XP was available in 25 different languages. Computer Grade 4 1.indb 21 21 11/02/17 2:53 pm

Windows Vista Features Smart on security. Redesigned Start button. Taskbar, borders around Windows get a brand new look. Windows Vista (30 January 2007) Do You Know? The release of Windows Vista came more than 5 years after the release of XP, the longest time span between releases of Windows operating system. Windows 7 Features Windows 7 (22 October 2009) Easy for finding information 11/02/17 2:53 pm Support for DVD disc and USB devices. 22 Computer Grade 4 1.indb 22

The default Taskbar of Windows 7 Windows 8 Windows 8 (26 October 2012) Features Windows 10 Revised Start menu with “apps” and “tiles” that Features connect to people, files and websites. New web browser called Microsoft edge. Windows 10 (29 July 2015) New Start menu. Xbox app. 23 Computer Grade 4 1.indb 23 11/02/17 2:53 pm

Disk Drives, Files and Folders in Windows A disk drive is a physical drive used for storage and receiving information on the computer. In Windows, disk drives are identified by letters. These include hard drives, floppy disk drives, optical drives and hard disk partitions. Each drive or partition is assigned a letter, such as A, B, or C. The letters A and B are reserved for floppy disk drives. The C drive is assigned to the main hard disk partition that contains the operating system and system file. The correct way to refer to a specific drive Fig. 3.1 Disk Drives in Windows on a Windows computer is a letter followed by a colon. Therefore, the main hard drive on a Windows computer would be identified as “C:” What is a File? A collection of data or information that has a name, called the filename. Almost all information stored in a computer must be in a file. Double-clicking the icon in Windows would open that file installed on the computer. There are millions of files in a computer and they are identified either by the file extension of the file or the data contained in the file. Some commonly used file extensions are shown in Fig. 3.2 File extension File Type File Icon .pdf Adobe Acrobat .docx MS Word 24 11/02/17 2:53 pm Computer Grade 4 1.indb 24

.bmp MS Paint .xls MS Excel .ppt MS PowerPoint .wav Audio .jpg Image Fig. 3.2 File Extension Do You Know? File names can contain up to 255 characters and can contain numbers letters, spaces and some symbols. Folder A folder is a location to store and organise computer files. A folder can also contain other folders. Names for folders can be up to 255 characters in length. You may use spaces and underscores in folder names, but you cannot use the following characters: * : < > | “?“ \\ or /. Fig. 3.3 Different folders Computer Grade 4 1.indb 25 25 11/02/17 2:53 pm

Glossary 1 . O  perating System: A program that runs on the computer and acts as a medium between the user and computer hardware. 2. File: An object in a computer that stores data and information. 3. Folder: A place to store files and other folders. 4. GUI: A human - computer interface that allows users to communicate with the computers easily. Inside the Lab Let’s practice a little of what we just learnt. Teacher’s Notes • B  riefly, explain the interface of Windows Operating System in the computer lab. • Show the different drives in a computer to the students. Student’s Notes • F  ind out the version of Windows installed on your school computer and your home computer. • O  p e n My Computer o n y o u r d e s k t o p a n d d i s c u s s t h e d i f f e r e n t foldersthere. • O  pen C: drive on your computer and identify the various types of files there. EXERCISE 1. Multiple Choice Questions a) A file with extension .bmp relates to A) Notepad B) Recycle Bin C) MS Paint D) MS Word 26 11/02/17 2:53 pm Computer Grade 4 1.indb 26

b) The earliest version of Windows was: B) Windows 98 A) Windows ME C) Windows 2000 D) Windows 1.0 c) The latest version of Windows was released in: A) 1995 B) 2015 C) 1900 D) 1985 2. True or False a) Windows 7 was available in 25 different languages. __________ b) A file can contain another file. ________ c) A folder name can contain “?”. __________ 3. Fill in the blanks a) W  indows _________ introduced touch screen and handwriting recognition. b) The most recent version of Microsoft Windows is __________. c) M  icrosoft was founded by _____________________ and ___________________________. 4. Match the Following a) Folder i) b) .pdf file ii) c) .doc file iii) d) Windows ME iv) Computer Grade 4 1.indb 27 27 11/02/17 2:53 pm

5. Very Short Answer Questions a) W  hich version of Windows introduced the Start menu and Taskbar? Ans. _________________________________________________________________________ b) I  am a storage space where programs and files can be located. Guess who I am? Ans. _________________________________________________________________________ 6. Short Answer Questions a) Name any two types of files with their extensions. Ans. _________________________________________________________________________ b) When were the following Windows versions released? 1. Windows XP 2. Windows ME Ans. _________________________________________________________________________ 7. Long Answer Question Explain files and folders in a computer. Ans. ____________________________________________________________________ _________________________________________________________________________ _________________________________________________________________________ _________________________________________________________________________ 28 11/02/17 2:53 pm Computer Grade 4 1.indb 28

8. Picture Based Question Guess the versions of Microsoft Windows and the release dates based on the logos given below: LOGO VERSION RELEASE DATE ACTIVITY Cross out the logos that are not associated with Windows Operating system. Computer Grade 4 1.indb 29 29 11/02/17 2:53 pm

4 CUSTOMIZING THE DESKTOP Hello friends. You all have seen how a Desktop looks like! Let us explore little more about Desktops in this lesson. Let Us Start Write the names of the Windows operating systems based on their release dates. 1. ________________________ 2. ________________________ 3. ________________________ 4. ________________________ We have already been introduced to the Desktop in the previous class. Whenever we switch on the computer, the operating system starts its work and shows a screen where we have a wallpaper, pictures etc. which is known as the Desktop. 30 11/02/17 2:53 pm Computer Grade 4 1.indb 30

In this lesson We will learn • More about the components of a Desktop • How to customize desktop components The lesson is based on Windows 7. Desktop Components Let us have a look at the Windows desktop and introduce you to few icons, the taskbar and the other components of the screen. Desktop Background The background picture of the Windows desktop is called the Desktop Background. You can set the desktop background as per your choice. Figure 4.1 shows few Desktops with different backgrounds. Fig. 4.1 Desktop Backgrounds Desktop Icons Icons are small graphical images that can represent the programs, files, folders and printers amongst other things on the computer. Icons are displayed on a computer screen in order to help the user navigate a computer system. Icons on Desktop Computer Grade 4 1.indb 31 31 11/02/17 2:53 pm

Screen saver A screen saver is a picture/text that appears on the desktop background after a period of inactivity. To get back to desktop from screen saver, you can move the mouse or press any key. Fig. 4.2 Bubbles Screensaver Do You Know? Screen savers were originally designed to help prevent images or texts from being burnt in older monitors. Taskbar The long bar at the bottom of the screen of the desktop is the taskbar. It has the Start Button and the System Tray. Fig. 4.3 Taskbar 32 11/02/17 2:53 pm Computer Grade 4 1.indb 32

Start Button The most important part of the Taskbar is the Start button. The Start button is where a lot of the action takes place in Windows 7. The Start button can be found in the bottom left of your screen. Click the start button and the Start menu appears. The start menu is used to access your programs, settings, printers and more. Let us read more about the options in Start menu. Log off Allows the computer running for someone else to use Fig. 4.5 Log off Fig. 4.4 Start Menu Fig. 4.6 All Programs All Programs Provides access to the installed programs. Run Allows us to open programs which are otherwise not available in the form of an icon or a menu. Fig. 4.7 Run Computer Grade 4 1.indb 33 33 11/02/17 2:53 pm

Search Fig. 4.8 Search Searches your computer for pictures, music, documents, files and folders. My Recent items This folder contains any recently viewed documents. Magic Desktop A desktop is a place where we can customize things easily. We can change the background, fonts, icons, etc. as we like. Let us know how. Changing Desktop Wallpaper STEP 1: Right-click on a blank part of the desktop and choose Personalize (Fig. 4.9). The Control Panel Personalization window appears. STEP 2: Click the Desktop Background (Fig. 4.10) option on the window bottom left corner. STEP 3: You will see many pictures in the window. Fig. 4.9 Click any of the pictures, and Windows 7 places it on your desktop background. STEP 4: Click Save Changes (Fig. 4.11) and exit the Desktop background window. Fig. 4.10 Fig. 4.11 34 11/02/17 2:53 pm Computer Grade 4 1.indb 34

STEP 2: Click on ‘Change desktop Fig. 4.12 icons’ option on top of left hand side of window (Fig. 4.12). Desktop Icon Settings window will apear. STEP 3: Various icons appear in the window. Select an icon (For e.g. Recycle Bin), you want to change. Click ‘Change Icon....’ button to change the icon (Fig. 4.13). STEP 4: A new page will open with few icons. Choose an icon to change the selected icon. Press OK button to change icon. (Fig. 4.14 ) Fig. 4.13 Fig. 4.14 Fig. 4.15 Changing Mouse Pointers STEP 1: Right-click on a blank part of the desktop and choose Personalize option. STEP 2: Click on ‘Change mouse pointer’ option on top left of the window. STEP 3: Mouse Properties window appears. Select a scheme you like from the drop down list. (Fig. 4.15) STEP 4: A preview of how the new chosen pointer looks will show in the square box to the right of drop down menu. Computer Grade 4 1.indb 35 35 11/02/17 2:53 pm

STEP 5: Click ‘OK’ if you like the new mouse pointer. New selected mouse pointer will now replace the old pointer. Changing Screen Saver STEP 1: From the Start Menu, select ‘Control Panel’ (Fig. 4.16). STEP 2: Click on ‘Appearance and Personalization’, and from the options displayed under Personalization, select ‘Change Screen Saver’ (Fig. 4.17). STEP 3: Using the drop down menu located Fig. 4.16 under Screen Saver, choose one of the default images to be displayed when your computer is idle (Fig. 4.18). STEP 4: Adjust the time under Wait box, Fig. 4.17 how long the computer should be left idle before the screen saver begins. STEP 5: Preview how the screen saver will look before you save the changes. Click Apply followed by OK to close the window. Fig. 4.18 36 11/02/17 2:53 pm Computer Grade 4 1.indb 36

Glossary 1. D esktop – The screen that comes up when we start the computer. 2. I cons – Small graphical representation to help quickly identify a type of fil or program associated with the icon. 3. Taskbar- Long horizontal bar at the bottom of the desktop. 4. Start Button – Opens up the Start Menu. 5. Personalize - Design something to meet individual requirements. Inside the Lab Let’s practice a little of what we just learnt. Teacher’s Notes • Explain the icons on the desktop - My Computer, Recycle Bin, internet explorer etc. • S how the Start menu to the kids and ask them to click on the various options like Recent items, Search, All programs etc. Student’s Notes Follow the steps mentioned in the lesson and do the following: • Change the background on the desktop. • Change the ‘My Computer’ icon. • Change the mouse pointer. • Change the screensaver of your desktop. EXERCISE 1. Multiple Choice Questions a) The screen that comes up with a picture when we start a computer is: A) Icons B) Desktop C) My computer D) CPU Computer Grade 4 1.indb 37 37 11/02/17 2:53 pm

b) The long bar at the bottom of the screen of desktop: A) Recycle bin B) Task bar C) Start Menu D) My Computer c) This folder contains any recently viewed items: A) Run B) Search C) My Recent items D) All programs 2. True or False a) “ Personalize” option appears once we right click on the blank part of the desktop. ______________ b) S tart Menu is shown by clicking on Run. __________ c) We can change the desktop background to any image stored in the computer. __________________ 3. Fill in the blanks a) Start button is at __________________ side of the taskbar. b) ______________ provides access to the installed programs. c) ___________ allows us to execute any programs that may not be available in the form of an icon or a menu. 4. Match the Following i) Screen Saver ii) Recycle Bin a) Small pictures on desktop iii) Opens the Start Menu b) Start button iv) Icons c) Has the deleted file d) Picture that appears when the screen is idle 38 11/02/17 2:53 pm Computer Grade 4 1.indb 38

5. Very Short Answer Questions a) Name any four components of desktop. 1) _____________________________ 2) ____________________________ 3) _____________________________ 4) _____________________________ b) Identify the image. Where is it placed on the desktop? Ans. _________________________________________________________________________ 6. Short Answer Questions a) What is the function of “Log off” button? Ans. _________________________________________________________________________ b) What happens when you click the Start button? Ans. _________________________________________________________________________ 7. Long Answer Question Write the steps required to change the Screensavers on the desktop. Ans. _________________________________________________________________________ _______________________________________________________________________________ _______________________________________________________________________________ _______________________________________________________________________________ Computer Grade 4 1.indb 39 39 11/02/17 2:53 pm

8. Picture Based Question In the above picture which desktop component is being changed? Explain the process. Ans. _________________________________________________________________________ ______________________________________________________________________________ ______________________________________________________________________________ Activity Identify the following images. _______________________ ______________ ______________________________________________________________________ 40 11/02/17 2:53 pm Computer Grade 4 1.indb 40

5 MORE ON MS PAINT Hey, Friends! Let us learn more about the features in MS Paint. Let Us Start We have worked with many tools in MS Paint in the previous class. We now know how to draw different shapes, write text and use different colors to create our own images. What if we want to modify an image we have? We can use MS Paint to have fun making changes to such an image. Let Us Do 1: Using tools that you learnt in the earlier class, create the image given below in MS Paint. Computer Grade 4 1.indb 41 41 11/02/17 2:53 pm

In this lesson We will learn • More features and tools of MS Paint • How to use images and make changes to them in Paint Features of Paint 1. Brush Tools There are various kinds of brushes that a user can use to make the painting more creative and fun. The different types of brushes are: Oil Brush, Crayon, Watercolor Brush, Marker (or felt pen), Natural Pencil and Airbrush. Figure 5.1 Brush Tools 2. Changing Sizes This means that the user can change the size to smaller or bigger after drawing a shape. This can be done by selecting Zoom in or Zoom out with your mouse (Figure 5.2). 3. Full screen View There is a feature in Windows 7 which gives the user a ‘Full screen’ view so that the user can see what his entire design looks like on the canvas. You Figure 5.2 can go to ‘Full screen’ view by clicking on the View tab. 42 11/02/17 2:53 pm Computer Grade 4 1.indb 42

4. Color Selection Microsoft Paint allows you to select multiple colors with the help of the mouse. The Left Mouse Click will act as the Primary Color, the Right Mouse Click will select the Secondary Color and the third color can be chosen by pressing Ctrl key + any mouse click. 5. Saving the Painting Another great feature of MS Paint is that you can save the drawing or the painting in different fil formats such as PNG, JPEG, BMP, GIF depending on your requirement. Editing Images Figure 5.3 Saving Image In Paint, you might want to make changes to a part of a picture or an object. To do this, you need to select the part of the picture that you want to change, and then edit it. If you want to undo the previous action, you use “Undo”. You can use it in two ways: Figure 5.4 Undo Option 1: Use the shortcut key Ctrl + Z. Option 2: Click the left arrow given above the home tab. (Figure 5.4) Let us see an example of Undo: 1. The original image is like the one given in Figure 5.4.1. Figure 5.4.1 2. You changed the color of the inside oval from Pink to Green (Figure 5.4.2). 3. But you don’t like it and want to change it back to Pink. So instead Figure 5.4.2 of going back to the Color Palette and choosing Pink, you can just use the Undo command (Ctrl + Z) and it reverts back to the image in Figure 5.4.1. Computer Grade 4 1.indb 43 43 11/02/17 2:53 pm

“Redo” option is used to repeat the last action Figure 5.5 Redo done. In the above example to repeat the action of making the oval to green, you can Redo the action. Option 1: Use the shortcut key Ctrl + Y. Option 2: Click the right arrow given above the home tab. Let Us Do 1: Write the keyboard shortcuts for the following options in Paint. • Cut ______________________ • Copy ______________________ • Paste ______________________ • Undo ______________________ • Redo ______________________ Text Tools The text tool is used to add text inside an image. To insert text into the picture – STEP 1: Click the Paint button and select Open from the Figure 5.6 Text Tool menu. Select the image you want to edit and click Open to open it in MS Paint. STEP 2: Click the Text tool in the Tools group (Figure 5.6). STEP 3: Click and drag on the picture (or inside a Figure 5.7 shape) to create a new text box. Select the font family and size from the Font group and then select the text color from the Colors group. Type the text into the text box. By default, the textbox background is Transparent. To type over a solid background color, click on the Opaque button. To change the background color, click on the Color 2 button and pick another color. 44 11/02/17 2:53 pm Computer Grade 4 1.indb 44