1310002-CSGK-G2-Integrated Book-Computers+GK-FY

CLASS 2 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 – 11 1. KNOW YOUR COMPUTER  Features  Computers at Work Areas  Computer-like Machines PARTS OF A COMPUTER 2. HANDLING THE MOUSE AND KEYBOARD 12 – 25  Keys on the Keyboard  Using the Mouse 3. START UP AND SHUT DOWN THE COMPUTER 26 – 35  Starting Up a Computer  How to Shut Down?  Do’s and Don’ts with Computers 4. INPUT AND OUTPUT DEVICES 36 – 45  Input Devices  Output Devices Table of Content.indd 1 06/02/17 3:33 pm

Lesson Page No. 46 – 53 TYPING AND DRAWING 54 – 64 5. LET’S TYPE IN NOTEPAD  Open Notepad Window  Using the Format and Edit Menu  Save and Exit Notepad 6. FUN WITH MS PAINT  Getting Around the Paint Window  Saving the Work  Colors, Tools and Shapes Table of Content.indd 2 06/02/17 3:33 pm

1 KNOW YOUR COMPUTER Hi Clicko, I have heard Yes Gini, that a computer is very computers have useful for us. Can you tell me for what purpose become very is the computer useful? useful for us. Let us learn how they help make our work easy. Let Us Start Today, computers play a very important role in every field of life. We can perform our work very easily. A lot of time is saved and overall cost is reduced to solve a particular problem. But there are many things it cannot do. Let Us Do 1: Tick the things where we can use computers. Cross where you think it cannot be used. Tina is drawing on paper. Can she also draw using a computer? You can use a fridge to keep food item cool and fresh. Can a computer be used as a fridge? You can make fresh fruit juice in your mixer. Can a computer be used as a mixer? Chapter 01-KNOW YOUR COMPUTER.indd 1 1 06/02/17 3:33 pm

In this lesson We will know the features of a computer. Also, we will learn how computers are useful in different work areas. Features A Computer is an electronic machine which is used to store data. Some of the important features that make it a smart machine are: Speed: Computers work at a very fast speed. Accuracy: Computer works on the input given to it by the user. Once the user enters the information needed, the machine gives the result without any error. Storage: Computers can store a huge amount of data. This data can be used at any time. Consistency: Computers work in a consistent way. They do not lose concentration due to heavy work. So, they can perform all jobs with equal attention. Versatility: A computer can perform different types of tasks. It is helpful in schools, hospitals, offices, etc. It is a versatile machine. Reliability: A computer performs many things at a fast pace. It is a very reliable machine. Computers are designed to make maintenance easy. 2 06/02/17 3:33 pm Chapter 01-KNOW YOUR COMPUTER.indd 2

Computers in Work Areas Computers are used in various ways depending upon the occupation. They are used in the fields of education, business, medicine, communication and entertainment. From Engineers to Doctors, Students, Teachers, and Government Organizations, they all use computers to perform specific tasks. Now, let us learn in detail about the uses of computers in different areas. EDUCATION 1. Computers are used in schools and colleges to: • Maintain student records • Help in teaching • Keep fee records • Track book records in library 2. T eachers use computers to make timetables, report cards, etc. 3. S  tudents can solve different kinds of problems easily using the computer. They can also collect information from the Internet. 4. C  omputers are also used in research. ENTERTAINMENT 1. C  omputers are used for making drawings. 2. W  e can use computers for making cartoon movies and animation films. 3. W  e can also play games and listen to music using computers. Chapter 01-KNOW YOUR COMPUTER.indd 3 3 06/02/17 3:33 pm

TRANSPORT SYSTEM Computers are very useful in transportation today. They are useful in both land and air transportation. 1. C  omputers help in booking tickets and provide information about the arrival and departure of trains and flights. 2. W  e can know the details of the buses or trains or the flights available to our desired destination. The timings and even updates on delays can also be known through these computers. Do You Know? Computers play an important role to ensure that planes stay on schedule and they fly safely. BANKING 1. C  omputers are used in banks to store records of account holders. 2. M  ost of the banks provide the facility of ATMs. The customers can draw money through ATM card at any time of a day. 3. Computers are used to keep a record of the cash. MEDICAL The Computer is used in every area of the medical field. It 1. Maintains patient history and other records. 2. I s used for used for patient monitoring and diagnosis of diseases etc. 3. Helps the doctors in performing operations. 4. Prepares medical reports of patients. 4 06/02/17 3:33 pm Chapter 01-KNOW YOUR COMPUTER.indd 4

HOME At home, we can do the following using computers. 1. Maintain personal records. 2. Access information on the Internet. 3. Draw pictures and write letters. 4. Listen to the music. BUSINESS The Computer plays many roles in business. Below is the list of a few areas where computers are used in business. 1. Marketing 2. Departmental Stores 3. Hotels and malls 4. Restaurants 5. Online shopping Almost all kinds of businesses use computers. They are used to: • Keep records • Prepare marketing documents • Research • Stay in contact with customers and employees Chapter 01-KNOW YOUR COMPUTER.indd 5 5 06/02/17 3:33 pm

Wow Clicko, I had no Yes, Gini. idea that computers help Hope you will us in so many different remember ways! now. Let Us Do 2: Identify and write the names of the given places below the pictures. Computer-like Machines We just learned that a computer is a very useful machine. It helps us to make our work easy. The parts of a computer need electricity to work. Hence, a computer is called an electronic machine. Computers are of different types and come in various sizes. These are Desktops, Laptops, Palmtops, Smartphones, Tablet computers etc. Let us know more about a few of them. Desktop A Computer that is designed to be used on a desk or a Fig. 1.1: Desktop table is called as a desktop computer (Fig. 1.1). Desktop computers come with a separate CPU cabinet, a monitor, and a keyboard. All these are connected to the CPU cabinet. 6 06/02/17 3:33 pm Chapter 01-KNOW YOUR COMPUTER.indd 6

Laptop Fig. 1.2: Laptop Nowadays, we use portable computers. They have almost replaced the desktop computers. Portable computers are also known as laptops (Fig. 1.2). They can be operated on our laps and carried easily. It has all the parts of a desktop computer in a single device. Do You Know? The first laptop was introduced in 1984! Palmtop It is a small computer that fits in our palm. A palmtop (Fig. 1.3) has very limited functionality compared to a laptop. It works on batteries. Notebook Fig. 1.3: Palmtop It is also a portable computer smaller than a laptop model (Fig. 1.4). Smartphone Fig. 1.4: Notebook It is a well-known device which is available in the market. Smartphones (Fig. 1.5) can be used for various purposes such as calculation, calling, messaging, watching videos or listening to music, etc. Fig. 1.5: Smartphone New words 1. Accuracy: Correctness of a value or result. 2. Storage: Space or a place for storing data. Chapter 01-KNOW YOUR COMPUTER.indd 7 7 06/02/17 3:33 pm

New words 3 . Consistency: Quality of always performing in a similar way. 4. Versatility: Able to be used for multiple purposes. 5. Reliability: Quality of performing consistently well. 6. T  ransportation: The activity of moving people or things from one place to another. 7. A  TM: ATM stands for Automated Teller Machine. It is a device used for banking transactions. 8. M  onitoring: Observing the progress or quality of something over a period of time. 9. D  iagnosis: The identification of the nature of an illness or other problem by examination of the symptoms. 10. Desktop: A computer suitable for use at an ordinary desk. 11. L  aptop: A computer that is portable and suitable for use while travelling. 12. Palmtop: A computer small and light enough to be held in one hand. 13. Notebook: A small and slim laptop computer. 14. S  martphone: Basically a touch screen mobile phone that performs many of the functions of a computer. Teacher’s Notes • I nvolve the children in a discussion about the places where they have seen a computer (home, airport, railway station, bank, school, Movie Theater) and how it can help people perform various tasks in those places. • A  rouse their curiosity by asking whether they would like to use computers. Demonstrate some simple applications of computers such as listening to music, watching video clips, drawing a picture, playing games, doing sums, writing, etc. 8 06/02/17 3:33 pm Chapter 01-KNOW YOUR COMPUTER.indd 8

• A  sk about their areas of interest. How computer can help them in enhancing their interest like drawing, listening to poems, songs, watching cartoons etc. • D  iscuss with the students if they have seen various types of computers at home. Ask them to name few of them. Student’s Notes • Make a list of different types of computers you see a) In the school b) At home • C  ollect pictures from a magazine or newspaper and make a chart on the uses of computers in different fields. • Make a list of work done using computers in your school. EXERCISE 1) Multiple Choice Questions: (B) Book tickets (D) All of these a) Computers are used in airports to: (A) Maintain passenger details (C) Display arrival and departure time b) Which of the following things can we NOT do on a computer? (A) Make tea (B) Type letters (C) Play games (D) Watch cartoons c) Which of the following is a portable computer? (A) CPU (B) Notebook (C) Desktop (D) ATM Chapter 01-KNOW YOUR COMPUTER.indd 9 9 06/02/17 3:33 pm

2) True or False 1) We cannot use computers in banks. _______________ 2) Computers need electricity to work. _______________ 3) D esktop computers are very small computers which can fit in our hand. ______________ 3) Fill in the blanks a) Computers are used to maintain student records in ____________. b) ATM stands for Automated _________________ Machine. c) Computer works in a ____________________ way. 4) Match the following a) It is used to withdraw money i) Hospital ii) Smartphone b) Small computers that can be kept iii) ATM on the lap are iv) Laptops c) Place where computers are used to maintain records of patients d) A mobile phone that performs many of the functions of a computer. 5) Very Short Answer Questions a) W  rite any two work areas where the computer is used. Ans. ������������������������������������������������������������������������ b) W  rite two uses of a computer in school. Ans. ������������������������������������������������������������������������ c) U  nscramble the jumbled words: i) POAIRRTS ii) ERSTLIVAE Ans. ������������������������������������������������������������������������ 10 06/02/17 3:33 pm Chapter 01-KNOW YOUR COMPUTER.indd 10

6) Picture Based Question on the C an you identify the computer-like machines? Put a tick pictures. Also, write the names for all the given pictures. ACTIVITY Fill in the blanks using the words given in the box. Then find the words in the grid. a) Computers ________________ huge amount of _______________. b) The first _____________________ was introduced in 1984. c) Computers are used in ________________________. d) We can listen to ____________________ on a computer. e) Computers work very _________________. f) A computer is a ______________________ machine. Reliable, Fast, Music, Store, Malls, Laptop, Data RQP T J KDC Y E VOR Z AN MA L L S J T L U SA I OSAK S D PQA E C F I L T FKBVJ CXO T U H L Z NB P S TOR E Chapter 01-KNOW YOUR COMPUTER.indd 11 11 06/02/17 3:33 pm

2 HANDLING THE MOUSE AND KEYBOARD Hey Gini, can you Sure Clicko, I do tell me what the remember! They are main parts of a computer are? Monitor, CPU and Keyboard. Let Us Start Gini forgot to mention one of the main parts of the computer. It is also called a pointing device. We can give input to the computer with the help of this device. Let Us Do 1: Can you remember the name of the device? Name and draw the device in the space below. 12 2/23/2017 12:31:52 AM Computer Grade_2_Xamcheck_(29012017).indb 12

Yes, Clicko, Now I Gini, we will remember all the parts discuss the mouse of a computer. Look at the and keys on the keyboard. It has so many keys on it. What are all these keyboard here. keys used for? In this lesson We will know • Different mouse actions. • The keyboard and its keys. Using the Mouse The mouse is an Input device also known as a pointing device. It is used to point out the items present on the computer screen. A mouse is used to select and open programs using the pointer. When we move the mouse around, the arrow on the screen also moves around. The arrow is called the mouse pointer. The mouse is usually kept on a flat surface called the mouse pad. Parts of a Mouse: Mouse pad A mouse has two buttons on the top. The button on the left-hand side is called the left button. The button on the right-hand side is called the right button. A scroll wheel is there in between two buttons. It helps us to move the cursor Computer Grade_2_Xamcheck_(29012017).indb 13 13 2/23/2017 12:31:53 AM

in any direction on the monitor (Fig. 2.1) SCROLL WHEEL RIGHT BUTTON Mouse Actions: LEFT BUTTON Fig. 2.1 Mouse 1. Point Buttons and 2. Click wheel 3. Double-Click 4. Right-Click 5. Drag 6. Scroll A long wire attaches the mouse to the CPU. Nowadays wireless mouse (Fig. 2.2) is also available. Fig. 2.2 Wireless Mouse Let Us Do 2: In the mouse given below, mark and colour the left button Blue and right button Green. Mouse Actions Pressing the button is called a Click. Clicking these buttons tells the Computer what to do. These are called actions. There are different types of mouse actions. Let’s learn them. 1. Left Button Action • L eft Click: Click the left button once. This is used to select an activity after you point to it. • D ouble-Click: Click the left button twice, quickly. This is used to open a document or program. 14 2/23/2017 12:31:55 AM Computer Grade_2_Xamcheck_(29012017).indb 14

• Drag: Click-and-hold a mouse button. Then move the ‘pointer’ (object) to a different part of the screen while keeping the mouse button pressed down. 2. Right Button Action • Right-Click: Click the right button once. Displays a list of commands. 3. Scroll Wheel • Scroll: Moves up and down pages. Friends! We learned the different actions in the mouse. Now, let us read the purpose for which the keyboard is used into a computer. Keys on the Keyboard The Keyboard is used to type numbers, words and symbols on the computer. The keyboard is made of several small buttons called ‘keys’. A standard keyboard has 104 keys. Each key corresponds to a number or letter or some special function. The keyboard is connected to the CPU by a wire. Fig. 2.3 Standard Keyboard 15 Computer Grade_2_Xamcheck_(29012017).indb 15 2/23/2017 12:31:56 AM

Let Us Do 3: In the keyboard given below color the Letters of your favorite place you visited or you wish to visit. Then write few lines about it in the space given below. There are different types of keys on a keyboard. Let us now read • Number keys about a few of • Alphabet keys • Arrow keys these keys in • Special keys detail. • Symbol keys 16 2/23/2017 12:31:59 AM Computer Grade_2_Xamcheck_(29012017).indb 16

ALPHABET KEYS The alphabet or letter keys (Fig. 2.4) are used to write text on the computer. There are (A to Z) 26 letter keys in 3 rows. First row (Q, W, E, R, T, Y, U, I, O, P) 10 letters. Second row (A, S, D, F, G, H, J, K, L) 9 letters. Third row (Z, X, C, V, B, N, M) 7 letters. Fig. 2.4 Alphabet Keys Do You Know? The QWERTY keyboard was developed by Christopher Sholes in 1874. NUMERIC KEYS The number keys (Fig. 2.5) are also called numeric keys. There is a total of 10 numeric keys (0-9) on the keyboard. Two sets of numeric keys are there on the keyboard. The number keys on the right side of the keyboard are called as the Numeric Pad. To use the numeric pad we need to press the NUM LOCK on first. Computer Grade_2_Xamcheck_(29012017).indb 17 17 2/23/2017 12:32:00 AM

All the number keys have special symbols printed on them. These keys are used for other purposes as well. Fig. 2.5 Number Keys CURSOR CONTROL KEYS A cursor is a small blinking line on the monitor. It shows the position of the next letter or number to be entered. The cursor control keys (Fig. 2.6) are also called as the arrow keys. These keys are used to move the cursor up, down, left or right. Fig. 2.6 Cursor Control Keys CAPSLOCK KEY Pressing the Caps Lock key allows you to type in capital letters. Press the Caps Lock key once again to type in lower case letters. 18 2/23/2017 12:32:07 AM Computer Grade_2_Xamcheck_(29012017).indb 18

A small green light on the keyboard indicates the status (light on – Capital letters, light off – lower case letters). SHIFT KEY Shift Key is used with the other keys for different purposes. Pressing and holding the shift key along with a letter key will type that letter in the capital even when Caps Lock is turned off. For example: gives ‘A’ (when the Caps Lock is off). Also, gives ‘a’ (when the Caps Lock is on). SYMBOL KEYS Symbol keys have special signs and symbols. These are present to the right of the letter keys such as: /, “, :, <, > etc. The special characters are also placed over the numbers on the Number keys such as: !, @, #, $, %, * etc. We can use these as Symbol keys by pressing the Shift key along with the Number key. Fig. 2.7 Signs and symbols Fig. 2.8 Special Characters above numbers SPECIAL KEYS Special keys are required to perform some special functions. Some of the special keys work in combination with other keys. Computer Grade_2_Xamcheck_(29012017).indb 19 19 2/23/2017 12:32:08 AM

Spacebar Key It is the long horizontal key of a keyboard. When the spacebar key is pressed it, types one space to the right. Backspace Key Backspace key (Fig. 2.9) is used to delete the characters or letters to the left of the cursor. Fig. 2.9 Backspace Key Delete Key Delete key (Fig. 2.10) erases anything typed on the right side of the cursor. Fig. 2.10 Cursor Position Escape Key The Escape key is used to close a menu or a dialog box. For example, if you have clicked the Notepad button by mistake, just press the ESC key, the notepad window will disappear. It is present in the upper left corner of the keyboard. 20 2/23/2017 12:32:11 AM Computer Grade_2_Xamcheck_(29012017).indb 20

Tab Key This key is present on the left side of the keyboard. It moves the cursor to the right by multiple spaces. (Fig. 2.11) Fig. 2.11 Sentence typed using TAB KEY Let Us Do 4: Rahul does not know which keys are seen on a keyboard. Help him by marking the keys which are seen on the keyboard in Red and the others in Blue. Computer Grade_2_Xamcheck_(29012017).indb 21 21 2/23/2017 12:32:15 AM

New words 1. Pointer: It is a symbol on the computer screen. It points the movement of a pointing device. 2. C ursor: Small blinking line on the monitor that shows the position of the next letter to be entered. 3. C lick: Pressing the mouse button to perform a task. 4. D rag: The action of selecting an object (Icon) drop in an alternate area using the mouse. 5. Scroll: The action of moving pages up and down. 6. B ackspace Key: A key that moves the cursor or insertion point backward by one character space. Teacher’s Notes • E xplain to students about the different type of Mouse actions. • In The lab, help students to open and start an activity by performing the left and right button actions. • S how a keyboard in the computer lab to identify the keys and their functions mentioned in the book. Student’s Notes • Observe the different types of mouse pointers. Find out the shape of the mouse pointer: i. Most commonly seen while working on the desktop. ii. When the computer is starting an activity. • S ome keys on the keyboard are seen at more than one Location. For example: Several keyboards have two Enter Key. Look at the keyboards around you and find more such keys. 22 2/23/2017 12:32:15 AM Computer Grade_2_Xamcheck_(29012017).indb 22

EXERCISE 1) Multiple Choice Questions: a) Tab key is used to move the cursor by _______________ spaces. (A) One (B) Three (C) Four (D) Multiple b) Mouse is a ____________________ device (A) Photo (B) Optical (C) Pointing (D) All of these c) Which of the following keys is used with other keys for different purposes? (A) Shift (B) Delete (C) Backspace (D) Number 2) True or False a) There are 12 number keys on a keyboard. ______________ b) Pressing the button is called a Click. ______________ c) The mouse has multiple buttons. ______________ 3) Fill in the blanks a) When the _____________ mouse button is clicked twice it opens a document or program. b) A standard keyboard has _______________ keys. c) The ______________ key erases anything typed on the left side of the cursor. Computer Grade_2_Xamcheck_(29012017).indb 23 23 2/23/2017 12:32:15 AM

4) Match the following i) ii) a) Cursor keys b) Mouse Pointer c) Symbol keys iii) d) Wireless Mouse iv) 5) Very Short Answer Questions a) I help to type capital letters. Ans. ������������������������������������������������������������������������ b) I can cancel a menu or a dialog box. Ans. ������������������������������������������������������������������������ c) I have a wheel on top of my head. I can move pages up and down Ans. ������������������������������������������������������������������������ 6) Picture Based Question Cheeky monkey wants to color the keyboard. Can you help him? Red- Number keys Blue- Alphabet keys Pink- Arrow keys Yellow- Backspace key Orange- Delete key Green- Caps lock key 24 2/23/2017 12:32:16 AM Computer Grade_2_Xamcheck_(29012017).indb 24

ACTIVITY Circle the words that are related to the Computer Mouse. Double click Tail Mouse pad Right click Photo click Wire Rat Left click Scroll button Computer Grade_2_Xamcheck_(29012017).indb 25 25 2/23/2017 12:32:18 AM

3 START UP AND SHUT DOWN THE COMPUTER Hey Gini, can you Sure Clicko! Let us teach me how learn how to do that…. to start and shut But do remember, we should be careful while down a computer? using a computer. Let Us Start Tina wants to complete her school project on her Computer. Help her reach the Machine! 26 2/23/2017 12:32:22 AM Computer Grade_2_Xamcheck_(29012017).indb 26

In this lesson We will learn how to start and shut down a computer. We will also learn how to take care of our computer. Starting Up a Computer We see computers all around in our daily lives. Do you want to know how to switch on a computer? It is important to switch ON and switch OFF a computer by following the right steps. Now let us discuss these steps. Do You Know? The process of starting a computer is Booting. STEP 1: Switch on the power. [Fig 3.1] STEP 2: Switch on the UPS and system unit. [Fig 3.2]     Fig 3.1      Fig 3.2 STEP 3: Switch on the monitor. [Fig 3.3] STEP 4: Wait for the desktop to appear on the screen.    [Fig 3.4]     Fig 3.3       Fig 3.4 Computer Grade_2_Xamcheck_(29012017).indb 27 27 2/23/2017 12:32:23 AM

UPS stands for Uninterrupted Power Supply. It has a battery inside it which stores electrical power. It is used to keep computers ‘ON’ for few minutes when there is a sudden power cut. By this way we can save the work we have done on the monitor. How to Shut Down? Should you just switch OFF Fig 3.5 the machine? No. Never Fig 3.6 switch off the computer directly. It may harm the computer. You must follow few easy steps to turn it off. STEP 1: Click on ‘Start’ or the windows sign on the screen of the computer. A panel will appear on the screen. [Fig 3.5] STEP 2: Click on the ‘Shutdown’/Turn off option in the panel. [Fig 3.6] 28 2/23/2017 12:32:25 AM Computer Grade_2_Xamcheck_(29012017).indb 28

STEP 3: Now the computer will take a Fig 3.7 few minutes to turn off automatically. Fig 3.8 Wait for the screen to turn black. [Fig 3.7] STEP 4: Switch OFF the monitor and UPS. [Fig 3.8] The CPU also gets automatically turned off after the Shutdown option is clicked. STEP 5: Switch off the main power socket switch. Do You Know? The distance between your eyes and the screen should be more than 40cm. Do’s and Don’ts with Computers Hello Gini, do you Yes Clicko, Let’s find know there are some out these rules. We rules we should keep should keep them in in mind while using a mind while using the computer? computer. Computer Grade_2_Xamcheck_(29012017).indb 29 29 2/23/2017 12:32:26 AM

Right Things to Do Sit down. Wait for the Sit properly in front of teacher’s direction. your computer. Keep your hands clean and Clean your computer dry when using computer. with a soft, dry cloth. Remove your shoes outside Make a queue while going the computer room. to the computer lab. 30 2/23/2017 12:32:28 AM Computer Grade_2_Xamcheck_(29012017).indb 30

Keep a distance from the Share the computer with your monitor to protect your eyes. friends. The Wrong Things to Do Do not take food or Do not play, run or fight drinks into the lab. inside the lab. Do not hit the keys on the Do not make noise and keyboard too hard. disturb others in the lab. Computer Grade_2_Xamcheck_(29012017).indb 31 31 2/23/2017 12:32:31 AM

Let Us Do 1: Tick the correct way of working in a Computer Lab. Fun Fact Early computers were of the size of a large room and used lots of power. New words 1. Shut down: To shut down a computer is to turn it off. 2. Computer Lab: It is a room in school where a number of computers are kept for the students to learn. Inside the Lab Teacher’s Notes • Take the students to the computer lab to learn and observe lab rules. • G ive them a demonstration on how to start and shut down the computer. • R egularly conduct an exercise of properly starting and shutting down a computer. 32 2/23/2017 12:32:33 AM Computer Grade_2_Xamcheck_(29012017).indb 32

Student’s Notes • Visit your computer lab, start and shut down the computer following the correct steps. • F ollow the lab rules properly mentioned in the book. EXERCISE 1) Multiple Choice Questions: a) What is the name of this button? (A) Switch on (B) Switch off (C) Start (D) Stop b) Start button can be seen at the __________ of screen. (A) Top (B) Bottom (C) Middle (D) Everywhere c) Which of the following should be clicked for shutting down the computer? (A) Hibernate (B) Log off (C) Shut down (D) Restart 2) True and False a) Sit very close to the computer. __________ b) Do not eat food or drink near the computer. __________ c) Play in the computer lab. __________ 3) Fill in the blanks a) It is important to switch _______________ and switch ______________ a computer by following the right steps. b) _________________ supplies power to all parts of the computer. c) When the screen turns ___________________, it means computer is switched off now. Computer Grade_2_Xamcheck_(29012017).indb 33 33 2/23/2017 12:32:33 AM

4) Match the following a) Maintain silence in the i) computer room ii) b) Remove your shoes before entering c) Keep the computer dust free iii) d) Stand in queue while entering iv) the room 5) Very Short Answer Questions a) Name the process of starting a computer. Ans. ������������������������������������������������������������������������ b) The steps to shut down a computer are given below. Number the steps in correct order. • Switch OFF the monitor • Click the Start button • Switch OFF the main power supply • Click on the Shut down button c) Name two machines that must be switched ON before they can be used. Ans. ������������������������������������������������������������������������ 34 2/23/2017 12:32:35 AM Computer Grade_2_Xamcheck_(29012017).indb 34

6) Picture Based Question Tick the DO’s and cross the DON’T’s: ACTIVITY Tick the correct option to complete the steps to switch ON the computer from the given option: 1. Switch __________ the main power supply switch. a. ON b. OFF c. None of these 2. Switch on the _______. a. keyboard b. mouse c. UPS 3. Press the power button on the _______. a. monitor b. UPS c. CPU 4. Switch on the _________. a. light b. fan c. monitor Computer Grade_2_Xamcheck_(29012017).indb 35 35 2/23/2017 12:32:39 AM

4 Input and Output Devices Clicko, we use different Yes Gini, computer devices let’s learn how all the devices can be used nowadays. Do you ever with the computer. I know wonder how does a to make a computer work there are different types of computer use these devices Input and Output devices to give us the result? can be connected to the computer. Let Us Start See the figure given below. A plant takes in water and gives flowers. Taking in is called Input. Giving out is called Output. Water is the input and flowers are the output for the plant. Let Us Do 1: Color the flower pot given below using the colors in the palette (Input) and then mark the Output with an arrow. 36 2/23/2017 12:32:41 AM Computer Grade_2_Xamcheck_(29012017).indb 36

We learned a computer is a versatile machine. It can perform a different type of tasks. A computer needs different types of data to do all these tasks. Before a computer processes the data, we need a method to input the data into the machine. Similarly, after the computer has processed data, we need to produce an output of the results. In this lesson We will learn • S ome devices are used to input information, while others are to output information from our computers. • T wo types of computer devices. Identify the Input and output devices with examples. Now let us learn a few of these devices. Input Devices Devices that help us put data or actions IN to a computer are called Input devices. They help in giving instructions to the computer. INPUT DEVICES • Keyboard There are different • Mouse types of input devices. • Scanner • Joystick Let us learn about • Microphone these in detail. • Webcam • Light Pen • Barcode Reader • Touch Screen • Track/Trackerball Computer Grade_2_Xamcheck_(29012017).indb 37 37 2/23/2017 12:32:42 AM

Keyboard The keyboard is used for entering data into the computer system. It can type words, numbers and symbols. The keyboard is probably the most used input device. Mouse The mouse is a most popular pointing device. It is used to draw pictures and select objects on the computer. But it cannot be used to enter text into the computer. Scanner The Scanner is used to input photographs or pages of text directly into the computer. Joystick A joystick is an input device commonly used to control video games. It is also a pointing device. Microphone The microphone or mike allows computer users to input audio into their computers. It can be used for various applications like adding sound to a multimedia presentation or for mixing music. Webcam A web camera takes pictures and puts it into the computer. These are the most commonly used devices. See below a few more examples of Input devices. Light Pen Barcode Reader Touch Screen Trackball 38 2/23/2017 12:32:44 AM Computer Grade_2_Xamcheck_(29012017).indb 38

Output Devices Devices that take and receive information OUT of the computer are called Output devices. The output from the computer may be printouts from the printer, sounds on the speaker, or images on the monitor. There are different types of Output devices like: OUTPUT DEVICES • Monitor Let us learn about • Speaker these in detail. • Printer • Projector • Headphone • Earphone • Plotter Monitor (VDU) A monitor is the main and most common computer output device. It displays text, graphics and videos on a screen. It is also called a Visual Display Unit. Speaker Speaker is a very popular output device. It produces output as sound. It allows us to listen to music and any other audios. Printer The printer is another output device. It produces output on paper. It can print a document or an image. Computer Grade_2_Xamcheck_(29012017).indb 39 39 2/23/2017 12:32:45 AM

Do You Know? A printed copy of information from a computer is called a Hard Copy. The same information, viewed on a computer display is referred as a Soft Copy. Projector It is an output device that takes the display of a computer screen and projects a large version of it onto a flat surface. Projectors are often used in meetings and presentations so that everyone in the room can view. Let us see a few more examples of output devices. Headphone Earphone Plotter Let Us Do 2: Tick on the correct options given below. INPUT/OUTPUT INPUT / OUTPUT INPUT / OUTPUT INPUT / OUTPUT INPUT / OUTPUT INPUT / OUTPUT 40 2/23/2017 12:32:47 AM Computer Grade_2_Xamcheck_(29012017).indb 40

Do You Know? The CPU is neither an input nor an output device. It only processes the information given by the input devices and sends the result to the output devices. New words 1. Scanner: A device used for copying a picture or document into a computer 2. Microphone: Device that allows users to input audio into their computers. 3. Trackball: An electronic device consisting of a rotatable ball. 4. Joystick: An upright handle used to control objects on the screen in a computer game. 5. Webcam: A video camera connected to a computer. It allows its images to be seen by Internet users. 6. Projector: a device with a system of lenses for projecting slides or film on to a screen. 7. Plotter: A device much like a printer that is used for printing. It can work on very large sheets of paper. Teacher’s Notes • Revise the various parts of the computer. Ask them to identify the various input and output devices. Do not give the answers directly. Ask more questions so that they can discover the right answers for themselves. • G ive other examples to clarify the concepts of input and output devices. For instance, to make fruit juice you need fruits as input and the juice is the output. Computer Grade_2_Xamcheck_(29012017).indb 41 41 2/23/2017 12:32:47 AM

• Revise the various parts of the computer. Ask them to identify what are the different input and output devices. Student’s Notes • L ist the basic input and output devices that we need to interact with the computer. • O bserve a house or building being constructed and identify the inputs and outputs. EXERCISE 1) Multiple Choice Questions: a) Which of the following is not an output device? (A) Printer (B) Speaker (C) Light Pen (D) Earphone (D) Printer b) Devices that let the computer communicate with you is (D) Soft Copy (A) Input (B) Storage (C) Output c) The output on VDU is called (A) Data (B) Hard copy (C) Monitor 2) True and False a) Output device allows data to be seen or heard. _____________ b) The display may also be called the screen or monitor. __________ c) Plotter is an input device. ______________ 3) Fill in the blanks a) _______________ prints exactly what is on the screen. b) The primary output device for computers is _____________. c) _____________is neither an input nor an output device. 42 2/23/2017 12:32:48 AM Computer Grade_2_Xamcheck_(29012017).indb 42

4) Match the following i) a) Video chatting b) Play sound ii) c) Displays output on a iii) whiteboard d) Allows hand drawn pictures iv) or photos to transfer to computer 5) Very Short Answer Questions a) List some input devices you are familiar with. Ans. ������������������������������������������������������������������������ b) List some output devices which can give us a hard copy. Ans. ������������������������������������������������������������������������ c) Identify the following as Input and Output: Computer Grade_2_Xamcheck_(29012017).indb 43 43 2/23/2017 12:32:49 AM

i) _______________________ ________________________ ii) Find out one use of Barcode Reader. Ans. ������������������������������������������������������������������������ 6) Picture Based Question Tina uses this computer system to write reports for a school newsletter. 44 2/23/2017 12:32:52 AM Computer Grade_2_Xamcheck_(29012017).indb 44