Class 2

b. He is asked to write the names of computer parts in capital letters, for this which technique should he use? Ans : .................................................................................. .......................................................................................... .......................................................................................... 2. Jhunuk Lal Bihari has to do mathematics project work on the computer. a. How many methods are there to type numbers in the keyboard ? Ans : .................................................................................. .......................................................................................... .......................................................................................... b. If he has to type numbers continuously, which method would you suggest him to type? Ans : .................................................................................. .......................................................................................... .......................................................................................... c. If he has to type numbers occasionally, which method would you suggest him to type? Ans : .................................................................................. .......................................................................................... .......................................................................................... Smart Page Computer Science Book-2 45

3. Santu Magrati is typing a paragraph about his science project work. a. If he found some mistakes on the right hand side of the cursor position, how would he eraser and retype ? Ans : .................................................................................. .......................................................................................... .......................................................................................... b. If he found some mistakes on the right hand side of five line above of the cursor position, how would he erase and retype ? Ans : .................................................................................. .......................................................................................... .......................................................................................... c. If he found some mistakes on the left hand side of three line be- low of the cursor position, how would he erase and retype ? Ans : .................................................................................. .......................................................................................... .......................................................................................... d. If he found some mistakes on left hand side of the cursor position, how would he erase and retype ? Ans : .................................................................................. .......................................................................................... .......................................................................................... Page More on Keyboard 46

Activities 1. Color keys with different colors: a. Cursor control keys : Red b. Number keypad : Blue c. Backspace green : Green d. Shift : Yellow e. Delete : Purple f. Numlock : Gray 2. Arrange the class in three groups and organize the chart paper presentation about keyboard. The presentation must be illustrated with text as well as picture and in- cluded the following sub topics: a. Introduction of keyboard. b. Use of keyboard c. Different types of keys. Smart Page Computer Science Book-2 47

4C H A P T E R MORE ON MOUSE INTRODUCTION Computer : Yes, Mr. Batuk, What is this ? Do you know about this ? Batuk Lal : I know, this is a Computer Mouse. It is called an input device or pointing or clicking device. Computer : Yes, it’s right. Do you also know that a mouse has usually two or three buttons on it? Batuk Lal : Omm.. I heard two buttons are there on mouse. Wheel Right mouse button Wheel Left mouse button Page More on Mouse 48

There are primary button (usually the left button) and a secondary button (usually the right button) on mouse. You will use the primary button most often. Most mouse also include a scroll wheel between the buttons to help you scroll through documents and Web Pages more eas- ily. On some mouse, the scroll wheel can be pressed to act as a third button.  Batuk Lal : But Mr. Computer, I don’t know about action of mouse. Please, tell me. Computer : The Mouse has many actions. • Click • Drag and drop • Double Click • Click and Hold • Right Click • Middle Click • Drag • Grab Let's learn more about the mouse actions now. Click Click means press once and release the left mouse button, without moving the mouse. A single click is gently used Smart Page Computer Science Book-2 49

to select an item on the monitor. On doing this, the mouse makes a clicking sound. Double Click Double click means gently press the left mouse button twice within a short pe- riod of time and release it. Double click- ing is generally used to open a window or a program. For example, if you double click on the 'This Pc' icon in the desktop, dialog box will open as given. Page More on Mouse 50

Right mouse click Right mouse click means, press and release the right mouse button, without moving the mouse. Right-clicking an item usually displays a list of menus. For example, when you right-click the Recycle Bin on your desktop, you’ll see a menu with options as given: Drag Dragging means Click-and-hold a mouse button, then move an object. For example, you can drag a window or an icon. The left mouse buttons can perform dragging actions. Smart Page Computer Science Book-2 51

Drag and Drop You can move items around your screen by dragging them. To drag an object, point to the object on the screen, press and hold the primary button, move the object to a new location, and then release the primary button. Releasing the primary button is called to drop. In this picture, New Text Document.Txt file is being dragged and ready to drop into the New folder. Click-and-hold Click and hold means press and do not release the left mouse button. Middle-click Middle click means press and release the middle mouse button without moving the mouse or using the mouse wheel as a button. Page More on Mouse 52

Grab Grab means point to an item that you can move, and click- and-hold on the mouse button. For example, you can grab the title bar of a window, then drag the window to a new location. Points to Know • Mouse is called input device or pointing or clicking device. • Mouse has usually two or three buttons on it. • Scroll buttons help you scroll through documents and Web Pages more easily. • Click means press once and release the left mouse button, without moving the mouse. • Double click means press the left mouse button twice • Right click means, press once right mouse button. • Drag means click-and-hold the left mouse button, then move an object. • Releasing the primary button is called drop. • Press and release the middle mouse button without moving the mouse. • Press and do not release the left mouse button is known as click and hold or grab the item. Smart Page Computer Science Book-2 53

Terms to Know Mouse : Pointing device or clicking device. Primary button : Left mouse button. Secondary button : Right mouse button. Desktop : First view on a computer screen after startup. Scroll wheel : Button helps to scroll page easily. Window : Separate viewing area on computer display screen. Dialog box : An user interface window. Drag : Click and move the object. Drop : Move the object and release the mouse button. Grab : Click and hold the mouse button. Worksheet Objective Questions 1. Fill in the blanks with suitable Words: click Right-clicking primary secondary pointing dragging double clicking a. Mouse is a .......................... and ............................ device. b. Right mouse button is known as ......................... button. c. A single ........................ is gently used to select an items on the monitor. d. .................... clicking an item usually displays a list of menus. e. .................................means click and hold a mouse button, then move an object. Page More on Mouse 54

f. Releasing the ............................. button is called drop. g. ....................... click means press the left mouse button. 2. Write 'T' for true and 'F' for false statements. a. Mouse has two or three buttons. b. Left mouse button is known as primary button. c. Scroll wheel is between primary and secondary but- ton. d. Scroll wheel helps to scroll the mouse pointer easily. e. Scroll wheel acts as a third button. f. Clicking means press twice and release the left mouse button quickly. g. The left mouse button can perform dragging. Descriptive Questions 1. Answer the following questions: a. What is the mouse? Ans : .................................................................................. .......................................................................................... .......................................................................................... Smart Page Computer Science Book-2 55

b. What does the scroll button help? Ans : .................................................................................. .......................................................................................... .......................................................................................... .......................................................................................... c. What do you mean by double click? Ans : .................................................................................. .......................................................................................... .......................................................................................... .......................................................................................... d. What do you mean by the right mouse click? Ans : ................................................................................. .......................................................................................... .......................................................................................... .......................................................................................... .......................................................................................... Page More on Mouse 56

e. What do you mean by grab click? Ans : .................................................................................. .......................................................................................... .......................................................................................... .......................................................................................... f. What is middle clicking? Ans : .................................................................................. .......................................................................................... .......................................................................................... .......................................................................................... g. What is meant by click and hold? Ans : .................................................................................. .......................................................................................... .......................................................................................... .......................................................................................... h. What is meant by click and hold? Ans : .................................................................................. Smart Page Computer Science Book-2 57

.......................................................................................... .......................................................................................... .......................................................................................... Analytical Case Study Questions 1. While working on the computer, Manjula Nakrmi got the follow- ing. a. How did she get this? Ans : .................................................................................. .......................................................................................... .......................................................................................... b. Why is she doing this? Ans : ................................................................................. .......................................................................................... .......................................................................................... Page More on Mouse 58

2. Devanjan Rai got this menu . a. How did Devanjan get this menu? Ans : .................................................................................. .......................................................................................... .......................................................................................... .......................................................................................... b. Why did Dvanjan activate this menu? Ans : ................................................................................ .......................................................................................... .......................................................................................... .......................................................................................... Smart Page Computer Science Book-2 59

3. Sudarshan Rana has opened the following dialog box: a. How did Sudarshan open this dialog box? Ans : ................................................................................. ........................................................................................... .......................................................................................... b. If he has to move this dialogue box to any other side of screen, What technique should he use? Ans : ................................................................................. ........................................................................................... .......................................................................................... .......................................................................................... Page More on Mouse 60

Activities 2. Arrange the class in three groups and organize a chart paper presentation about the Mouse. The presentation must be illustrated with text as well as picture and in- cluded the following sub topics: a. Introduction of Mouse. b. Use of Mouse c. Different types of buttons of the mouse. Smart Page Computer Science Book-2 61

5C H A P T E R WORKING STEP BY STEP INTRODUCTION Batuk Lal : Hello, Mr. Computer! I am confuse in your working style. How do you work actually ? Computer : OH ... I am not like you Master Batuk. I am a machine. I need step by step instructions from you, then only I can work. I can not do any work with my own sense. Batuk Lal : Wow ! why do you need step by step instruction? Computer : Tell me, how do you go up and down of the floor at your home Master Batuk ? Batuk Lal : I go up and down step by step, using Stairs. Mr. Computer. Page Working Step By Step 62

Computer : Why do you go step by step ? Batuk Lal : For feeling easy and comfortable when going up and down in the stairs. Computer : Yes, you are right. In this way we do most of our work step by step. If you try to skip stairs, you may not complete, accident may occur. So, I also need step by step instruction to complete work perfectly. EXAMPLE : 1 Steps for Eating Chocolate Step-1 Wash your hand. Step-2 Remove the wrapper. Step-3 Eat the chocolate. Step-4 Throw the empty wrapper in the dust bin. Smart Page Computer Science Book-2 63

Step-5 Wash your hand. Computer : Let's imag- ine, what will happen if you try to eat the chocolate without open- ing the wrap- per ? Batuk Lal : Yes, without opening the wrapper, we can not eat properly. It seems very dirty and untidy for eating. Computer : Exactly, Master Batuk. So, we must do our every work step by step easily and smartly. These steps for completing task is called algorithm in terms of mine. Batuk Lal : Oh, it means, before starting any work, we have to make step-wise plan, Mr. Computer. Computer : Yes, Now, you are clear. Page Working Step By Step 64

EXAMPLE : 2 Steps for Eating Breakfast Wake up. Get tooth paste in brush. Brush your teeth. Wash your face. Wipe your face with Page a towel. 65 Smart Computer Science Book-2

Eat your breakfast. Wash your handsand clean your mouth. Wipe your hand and mouth. Computer : Is it good habit? Eating breakfast before brushing the teeth and washing face before brushing the teeth. Batuk Lal : No...No...., Mr. Computer. Computer : Ohooo, I think, you understood the importance of Step by step work. Batuk Lal : Yes, Mr. Computer. Now. I understood. Page Working Step By Step 66

Points to Know • Computer is a machine that needs instruction to work. • Computer has no sense. • Computer works according to our instruction. • We must give clear and right instruction in right order. Terms to Know Step by step : One after another Instruction : Order to work. Machine : A device which helps to do our work easy and fast. Sense : Ability to know right or wrong. Worksheet Descriptive Questions 1. Answer the following questions: a. What is a computer? Ans : ................................................................................. ........................................................................................... b. What does a computer need to work? Ans : ................................................................................. ........................................................................................... Smart Page Computer Science Book-2 67

Analytical Questions : 1. Arrange the steps in correct order for the following: a. Preparing Tea: • Put the tea bag in a cup. • Pour some of the boiled water into the cup. • Add milk to the cup. • Fill the kettle with water. • Boil the water in the kettle. • Add sugar to the cup. • Stir the tea. • Drink the tea. Ans: .............................................................................................. ....................................................................................................... ....................................................................................................... ....................................................................................................... ....................................................................................................... ....................................................................................................... ....................................................................................................... ....................................................................................................... Page Working Step By Step 68

b. Algorithm for going a class picnic. • Make all plans for picnic • Do the activities planned for picnic • Decide a good place/spot for picnic • Arrange a vehicle to reach the destination • Get in vehicle and go to the spot • After completing your event, get in the vehicle • Get back to home/school Ans: ............................................................................................... ....................................................................................................... ....................................................................................................... ....................................................................................................... ....................................................................................................... ....................................................................................................... ....................................................................................................... ....................................................................................................... Smart Page Computer Science Book-2 69

a. Shivani Gupta has to prepare an om- elet for the breakfast. How should she plan for making an omelet ? Ans: ............................................................ ..................................................................... ..................................................................... ....................................................................................................... ....................................................................................................... ....................................................................................................... ....................................................................................................... b. Jigme and Lakpa are younger sister and elder brother. They have to plan for going to school. How would they make plan. Ans: ......................................................... .................................................................. ....................................................................................................... ....................................................................................................... ....................................................................................................... ....................................................................................................... ....................................................................................................... Page Working Step By Step 70

c. Lalu Ram has to take the breakfast. If he has to make plan for his breakfast, how would he write his plan? Ans: ............................................................. ...................................................................... ...................................................................... ....................................................................................................... ....................................................................................................... ....................................................................................................... ....................................................................................................... ....................................................................................................... d. Zhnadu Dev has to do his homework. But he does not complete in time. So, he thinks to make right plan for his home work. How would he make his plan? Ans: ................................................................. ......................................................................... ......................................................................... ....................................................................................................... ....................................................................................................... ....................................................................................................... Smart Page Computer Science Book-2 71

6C H A P T E R LEARNING INSTRUCTION Turtle had heard about Mr. Computer. One day Turtle thought to meet Mr. Computer. He started to search for a very far distance. He met an intel- ligent Tom and asked. 'Hey Mr. Tom, have you seen Mr. Com- puter ?' Tom : Yes, yes he is in our village. Let's go............ Let's see, he is there ......go and meet . Let's see, Turtle wants to meet Mr. Computer. He has to move forward with few steps . Hey, Mr. Turtle, You have to move 4 steps forward to meet Mr. Computer. Try, try ...! Page Learning Instruction 72

Let's see, Turtle has to move 3 steps back to get Mr. Computer. Oh, my God ! Hey, Mr. Turtle, You have to move 3 steps back- ward to meet Mr. Computer. Ok..Ok.. ! Mr. Tom, I follow your instruction and move back 3 steps. Look here, Mr. Computer is on the left hand side of the Turtle. The Turtle has to move few steps LEFT hand side. Hello, Hello ! Hey, Mr. Turtle, You have to move 16 steps left to meet Mr. Computer. Sure ! Mr. Tom, I obey to Page your instruction and turn left and move 16 steps. 73 Smart Computer Science Book-2

Mr. Computer is on the RIGHT hand side of the Turtle. Turtle has to move few steps RIGHT hand side. Hello, Hello ! Hey, Mr. Turtle, You have to move 17 steps right to meet Mr. Computer. Of course ! Mr. Tom, I understood your instruc- tion. Now, I turn right and move 17 steps. Page Learning Instruction 74

GOAT AND TURTLE Once upon a time, there was a goat. The goat had five smart lambs. They were all happy. In the jun- gle nearby, there was a jackal. One day, the goat went outside the home. The jackal came and killed all lambs and ate them up. The goat became angry. She went to the jungle with the turtle to search the Jackal. But she did not know where to go. Suddenly she got a small Jerry. Jerry said, \"I know about the jackal's home. Goat became happy. The small Jerry told the following direction to get the Jackal. Step-1 : Start from here Step-2 : Walk 15 steps ahead Step-2 : Turn Right Step-3 : Walk 10 steps FORWARD Step-4 : Turn Left Step-5 : Walk 8 steps FORWARD Step-5 : Turn left Step-6 : walk 2 steps FORWARD Step-7 : Turn right Step-8 : walk 2 steps FORWARD Smart Page Computer Science Book-2 75

The small Jerry said, \"These steps will you to a small cave. The jackal is hidden in that cave.\" Turtle took the goat according to the instruction and they reached in the cave. The jackal was sitting outside the cave. The goat was getting angry when she saw the jackal and started to attack with sharp horns to the jackal. Finally, the goat revenged to jackal by killing him Page Learning Instruction 76

Points to Know • We must give clear direction to reach the destination. • Direction must be given step-by-step. Terms to Know Page Turtle : Imaginary character 77 Instruction : Order to do something. Worksheet Objective Questions 1. Select the correct option a. Which direction should Captain give to make the Turtle move back 5 steps? i) BACK 5 ii) BKD 5 iii) BWARD 5 iv) BCK 5 b. Which direction should Captain give to make the Turtle move forward 15 steps? i) FWD 15 ii) FWARD 15 iii) FOWARD 15 iv) FORD 15 c. Which direction is Captain pointing? i) RIGHT ii) UP iii) DOWN iv) LEFT Smart Computer Science Book-2

d. Which direction is Turtle pointing? i) LEFT ii) UP iii) DOWN iv) RIGHT 2. Count number of steps of turtle and fill in the blanks: a. Direction : Forward ............ b. Direction : Forward ............ Turn ........................... Page Learning Instruction 78

c. Direction : Forward ............ Turn ........................... Forward ............ Turn ........................... d. Direction : FORWARD ............ Turn ................. FORWARD............ Turn .................. FORWARD............ Turn .................. Smart Page Computer Science Book-2 79

Analytical Questions : 1. Early in the morning Turtle went outside the hut to get his food. The following picture shows how turtle moved around the jungle. Write the directions for the path followed by Turtle to return to his hut. Ans :......................................................................................... ................................................................................................. ................................................................................................. ................................................................................................. ................................................................................................. 2. Is there any short option for Turtle to reach his hut. If yes, rewrite the direction. Ans :......................................................................................... ................................................................................................. ................................................................................................. ................................................................................................. ................................................................................................. Page Learning Instruction 80

3. On the basis of the following grid and instructions, if the frog start to jump from the given position, where will he reach? i) a. Start at the hippo. b. Jump 2 steps forward. c. Turn right. d. Jump 2 steps forward. e. Jump 1 steps backward. Where is the frog now? Circle the object and color with red. Ans: ................................................................................................ ......................................................................................................... Smart Page Computer Science Book-2 81

ii) a. Start at the goat. b. Jump 3 steps forward. c. Turn right. d. Jump 2 steps forward. e. Turn right. f. Jump 3 steps forward. g. Jump 2 steps backward. h Turn left i. Jump forward 1 step Where is the frog now? Circle the object and color with blue. Ans: ................................................................................................ ......................................................................................................... iii) a. Start at the Turtle. b. Jump 3 steps forward. c. Turn right. d. Jump 3 steps forward. e. Turn right. f. Jump 2 steps forward. Where is the frog now? Circle the object and color with green. Ans: ................................................................................................ ......................................................................................................... Page Learning Instruction 82

7C H A P T E R FUN WITH TUX PAINT INTRODUCTION Tux Paint is a free drawing program designed for children. It has a simple interface, fun sound effects, and an encour- aging cartoon mascot who helps guide children as they use the program. It provides a blank canvas and a variety of drawing tools to help you to be creative. STARTING TUX PAINT Step-1 : Double click the shortcut icon of Tux paint from Desktop. or Step-1 : Type Tux paint in Search box. Step-2 : You get two op- tions of Tux paint App., one is Full Screen and another is window view (Windowed) Step-3 : Double click on any one option. Smart Page Computer Science Book-2 83

Usually, it is better to open Tux paint in windowed view (new window view) because the full screen hides all others options of desktop. TITLE SCREEN When Tux Paint loads at first, a title start up screen will ap- pear. Once Title screen loading is complete, press a key or click on the mouse to continue. (Or, after about 30 sec- onds, the title screen will go away automatically.) When Title Screen goes away, you get the following main screen. Page Fun with Tux Paint 84

Drawing Canvas Selector Toolbar Help Panel Color Palate MAIN SCREEN The main screen is divided into the following five sections: Toolbar The toolbar contains the drawing and editing controls. Drawing Canvas The largest part of the screen in the center is called the drawing canvas. This is obviously used to draw . The size of the drawing canvas depends on the size of Tux Paint. Smart Page Computer Science Book-2 85

Selector Depending on the current tool, the selector shows different things. e.g., when the Paint Brush tool is selected, it shows the various brushes available. When the Rubber Stamp tool is selected, it shows the different shapes you can use. Colors Palette Color palette is a collection of colors. It is located below the canvas area. There are first 17 fixed colors and next two special color options: Color Picker : Used to select color from drawing Rainbow Pallet : Used to pick a color from a color box con- taining thousands of colors Help Area At the very bottom of the screen where the Linux Penguin image is seen is called help area. This help area provides tips and information while you draw. TOOLS Tux paint is a drawing software. It has lots of tools for draw- ing and painting. When you use tools, you can hear differ- ent sound. But your speaker must be on for the sound. Let's discuss about common tools: Page Fun with Tux Paint 86

Paint (Brush) The Paint (Brush) tool lets you draw freehand drawing, using various brushes and colors. If you hold the mouse button down, and move the mouse, it will draw as you move. As you draw, a sound is played. To draw drawing using Paint Tool, follow the fol- lowing steps: Steps to Follow : Step-1 : Find and click the Paint Tool. Step-2 : Select the brush size from the right hand side brush selector panel. Step-3 : Select the color from color palette. Step-4 : Click and hold the left mouse button and move the mouse pointer on canvas area, it seems of draw. Step-5 : Release the mouse pointer when you finish a part of drawing. Smart Page Computer Science Book-2 87

Eraser Tool The Eraser Tool is used to rub or erase unwanted part of the drawing. To use Eraser Tool follow, the following steps: Steps to Follow : Step-1 : Find and click the Eraser Tool. Step-2 : Select the Size Eraser from the right hand side selector panel. Step-3 : Click and hold the left mouse button and move the mouse pointer on the unwanted part of the drawing to erase. Step-4 : Release the mouse pointer. Page Fun with Tux Paint 88

Lab Activities 1. Draw the following drawings using Eraser and Paint brush Tool Smart Page Computer Science Book-2 89

Lab Activities 1. Draw the following objects using Eraser and Paint brush Tool Page Fun with Tux Paint 90

Lab Activities 1. Draw the following objects using Eraser and Paint brush Tool step by step and complete. Smart Page Computer Science Book-2 91

Lab Activities 1. Draw the following objects using Eraser and Paint brush Tool step by step and complete. Page Fun with Tux Paint 92

Line Tool The Line Tool is used to draw straight line using different types of brush shape. To use Line Tool, follow these steps: Steps to Follow : Step-1 : Find and click the Lines Tool. Step-2 : Select the thickness of line from the right hand side of selector panel. Step-3 : Select the Color from the Color palette. Step-4 : Click and hold the left mouse button and drag the mouse pointer on the drawing area. Step-5 : Release the mouse button to get the line. Smart Page Computer Science Book-2 93

Lab Activities 1. Draw the following drawings using Eraser, Paint brush and Line Tool step by step and complete. Page Fun with Tux Paint 94