New Gateway to Computer Science 2

Your index finger (pointer) should rest on the
left button of the mouse.

Place your middle finger
on the right button of
the mouse.

Your ring finger and
little finger should rest
on the right side of the
mouse.

Your palm should cup the end of the mouse
gently.

The base of your wrist should rest on the mouse
pad or the desktop.

Some mouse action:

A mouse has various actions. You can click,move,drag,
double click, right click, left click, scroll, etc. with
the mouse. Some of them are discussed below.

48 New Gateway to Computer Science Book - Two

1. Click: In order to use the mouse, you have to
learn to point and click. First, you need to learn
how to click.
¬¬ When you click, you are interacting with the
computer or telling it what to do.
¬¬ In order to click, press and release the left
mouse button with your index figure.

2. Rollover: It is a process of moving the mouse
above a picture or an element without clicking
or double clicking the mouse button.

3. Double Click: A double click is the act of pressing
a mouse button twice quickly without moving
the mouse. This can be used to open folders,
files, and pictures and start programs on your
computer.

4. Drag and Drop: It is an action of mouse that is
used to select an item, move it (dragging) , and
then place it (drop) into an alternative area of
the screen. In short, it is the process of moving

New Gateway to Computer Science Book - Two 49

an object, text or pictures from one place to
another.

5. Left Click: When we keep our index finger on
the left button of mouse and press it once, it is
left click.

6. Right Click:When we keep our middle finger on
the right button of the mouse and press it once,
it is called right click.

Oral Evaluation

yy How many buttons does a mouse have?
yy Tell any four ways of handling the mouse.
yy What are the various mouse actions?
yy What do you mean by click?
yy Tell about drag and drop.
yy What is the use of the double click?
yy What is rollover?
yy What is left click?
yy What is right click?

50 New Gateway to Computer Science Book - Two

Let's Revise

áá The mouse is a handheld input pointing device.
áá All the desktop computers need a mouse to

work properly.
áá Most of the mouse have three buttons with

scroll button.
áá Always place your thumb on the desk or table

top on the left side of the mouse.
áá The base of your wrist should rest on the

mouse pad or the desktop.
áá Always place your middle finger on the right

button of the mouse.
áá In order to use the mouse, you have to learn

to point and click it.
áá If you press the mouse button continuously

for two times it is called double click.

Project Work

Draw a picture of the mouse in A4 size paper and
submit it to your subject teacher.

New Gateway to Computer Science Book - Two 51

Evaluation Time

1. Write True for correct and False for the
wrong statements.

a. The mouse is an input device.

b. The mouse is also a handheld
device.

c. The mouse is also called pointing
device.

d. The mouse has four buttons.

e. We cannot open a program with the
help of the mouse.

f. The base of your wrist should rest
on the mouse pad or the desktop.

g. Drag and drop is an action of the
mouse.

h. When we keep our index finger on
the left button of the mouse and
press it once, it is right click.

i. On Right Click, we keep our middle
finger on the right button.

52 New Gateway to Computer Science Book - Two

j. Your palm should cup the end of
the mouse gently.

k. It is impossible to perform double
click action with the help of a
mouse.

2. Fill in the blanks.

a. The …………………….. is a handheld input
pointing device.

b. The ………………………….. lets you point objects
on the screen.

c. All the desktop computers need …………………..
to work.

d. Your ………………….. finger (pointer) should
rest on the left button of the mouse.

e. When you …………………, you are interacting
with the computer or telling it what to do.

f. A …………………………… is the act of pressing a
mouse button twice quickly without moving
the mouse.

New Gateway to Computer Science Book - Two 53

2. Answer the given questions:

a. What is a mouse?

..........................................................................................................................................................................................................

b. What are the three buttons of the mouse
called?

.............................................................................................. ...................................................................................................

..............................................................................................
c. Write any two proper techniques to handle a
mouse.

..........................................................................................................................................................................................................

..........................................................................................................................................................................................................

d. Write any four mouse actions.

.............................................................................................. ...................................................................................................

.............................................................................................. ...................................................................................................

e. What is left click?

..........................................................................................................................................................................................................

f. What is right click?

..........................................................................................................................................................................................................

54 New Gateway to Computer Science Book - Two

3. Name the buttons of a mouse.

Practical Time

¬¬ Visit the computer lab and demonstrate the
mouse, its buttons and also discuss its actions.

¬¬ Learn how to connect the mouse to the system
unit.

¬¬ Perform the given mouse actions in lab
Double click, Drag and Drop, Right click.

New Gateway to Computer Science Book - Two 55

Unit : 6

Uses of Computer

Note to Teacher

Explain about the application areas of the computer.
Collect some figures where computers are being

used and demonstrate them in the class.
Let the students observe the various departments

of your schools where computer technology has
been used.

56 New Gateway to Computer Science Book - Two

Dear students,
you might have seen a
computer in various places.
The use of computer is most
essential in these days. In this
lesson, we will read about the various
places where the computers are used.

Note to the Teacher
Select any two students of the class and let them do
the given conversation.

Conversation time:
Mr.Ujjal is a very clever and funny boy. His
father,Mr.Upendra works at bank. When his
father comes back to home after office, he asks
him some new things and wants to gain knowledge.
Today,Ujjwal is going to ask his father about the
uses of a computer.

New Gateway to Computer Science Book - Two 57

Ujjwal, Do you want to know
about the uses of a computer?

Sure, dad! I am so much eager to know
about the uses of a computer. Why do
many people work with the computer?

As you know that the computer is a
very useful machine for us, we can work
very easily with the help of the computer.
Nowadays, without the computer, most
of the things are impossible to do. You
can work fast and easily with the help of
the computers. There are various fields
where the computers are being used.

Dad! Explain me in detail about
the uses of a computer, please.

58 New Gateway to Computer Science Book - Two

Listen! I will explain it now. The uses
of a computer are as follows.

It is used at home for listening and watching
rhymes , music , movies , playing games, reading
stories and poems, drawing, painting, etc.

It is used at school for reading, presentation, etc.
It is used at bank to keep the records of

customers and verify the signature.
It is used at hospital to keep the records of patients.

It is also used to check the health of a patient.
It is used at shopping centres to prepare a bill.
It is used at airport to prepare a ticket.

Oh! Computers are really
useful machines for us.

Yes! Computers are very useful for us.
We always have to use the computers
for good works only.

New Gateway to Computer Science Book - Two 59

Oral Evaluation

yy Who is a very clever and funny boy?
yy Tell the name of Ujjwal’s father.
yy Where does Ujjwal's father work?
yy Who wants to know about the uses of a computer?

Let's Revise

áá The computer is a very useful machine for
us. With the help of computer we can do our
work very easily.

áá Thecomputersarealsousedforentertainment.
áá The computers are very important for

communication.
áá At bank, the computers are used for the

signature verification, balance enquiry, etc.
áá At shopping centre, the computers are used

to prepare bills.
áá It is possible for online ticket booking and

reservations due to the computer.
áá Students can use the computer as their

learning tools.

60 New Gateway to Computer Science Book - Two

Evaluation Time

A. Write True for correct and False for the
wrong ones.

a. The computer is a very useful
machine for human.

b. We can listen to music from the
computer system.

c. You cannot listen to the rhymes
from the computer.

d. The computers are also used at
bank.

e. We should not use the computer
for good works.

f. In ATM center, the computer
system is not necessary.

g. At school, the computers are used
to keep the record of doctors.

h. The computers are used at airport
to keep the records of hotels.

New Gateway to Computer Science Book - Two 61

B. Fill in the blanks with correct words.

a. The computer is used at ………………….for
listening and watching rhymes , music ,
movies , playing games, reading stories and
poems, drawing, painting, etc.

b. The computers are used at school for
……………………., presentation, etc.

c. The computer is used at……………………to keep
the records of customers.

d. The omputer is used at ……………………. to
keep the records of patients.

e. The computer is used at ……………………….. to
prepare a bill.

f. The computer is used at ……………………….. to
prepare a ticket.

62 New Gateway to Computer Science Book - Two

C. Match the following with correct pictures.

Computer at
bank

Computer at
hospital

Computer at
school

Computer for
entertainment


D. Answer the following questions.

a. Is the computer a useful machine for us?
.............................................................................................................................................

.............................................................................................................................................

New Gateway to Computer Science Book - Two 63

b. For what purpose can you use the computer
at school?

.............................................................................................................................................

.............................................................................................................................................

c. For what purpose the computer is used at
airport?

.............................................................................................................................................
.............................................................................................................................................

d. What is the use of computer at the shopping
centre?

.............................................................................................................................................

.............................................................................................................................................

e. What is the use of the computer at hospital?
.............................................................................................................................................

.............................................................................................................................................

64 New Gateway to Computer Science Book - Two

Unit : 7

Starting a Computer

Note to Teacher

Demonstrate the opening process of some
electronic devices in the class room such as mobile,
fan, radio, calculator, etc.

Make your children visit the computer lab and
demonstrate the opening process of the computer.

Demonstrate the process of turn off the computer
system to the students.

New Gateway to Computer Science Book - Two 65

As you know that, when
you attach any electronic
device with electricity,
some of them start to work
automatically and some need to
be opened manually. When the
devices get electric source, then
you need to press the switch button of the
device. Each electronic device like fan, radio,
calculator, rice-cooker, heater, television,

etc. has a power button to start.

Let’s see the given pictures:

Like in other electronic devices the computer
also has its own power button. After you join the
computer system with electric source, you need to
press the power button of monitor and system unit.

66 New Gateway to Computer Science Book - Two

Here, we are going to learn how to open the computer
system.
Join the monitor and system unit with the main

electric switch.
Press the power button of the monitor.
Press the power button of the system unit.
Now, the computer starts to open. (Wait for a

moment)
After the computer system opens, you will get

the given screen. It means you are ready to
work with the computer.

Shutting down the computer:

Right-click on the Start button or the window
key from the keyboard.

New Gateway to Computer Science Book - Two 67

A list appears as below.

Choose the Shut down or sign out option.
A next list appears as given.

Click on the Shut down option to close the
computer system.

68 New Gateway to Computer Science Book - Two

Oral Evaluation

yy Do you need to shut down the computer after its
use?

yy Is it necessary to join the monitor with the power
source?

yy Which button do you have to press to start a
computer? Power button or restart button?

yy What are the options available in the windows 8,
shutdown or sign out option?

Let's Revise

áá When you attach a device with the electricity,
some of them start to work automatically and
some of them have to be opened manually.

áá To turn ON any electronic device you have to
press the power button.

áá When you see the first windows desktop
screen, it means you are ready to work with
the computer system.

áá Always connect a computer parts in correct
way to work with the computer system.

New Gateway to Computer Science Book - Two 69

Evaluation Time

1. Complete the given paragraph with the help
of the following words.

As you know that, when you attach any
………………………… with electricity some start to
work ……………………. and some need to be opened
…………………... When the devices get …………………………
source, then you need to …………………………..button
of the device. Each …………………………………has power
……………………. to start like fan, radio, calculator,
rice-cooker, heater, television, etc.

2. Write down the process to START a computer.

..................................................................................................................................

..................................................................................................................................

..................................................................................................................................

..................................................................................................................................

..................................................................................................................................

70 New Gateway to Computer Science Book - Two

3. Write down the process to SHUT DOWN a
computer.

..................................................................................................................................

..................................................................................................................................
..................................................................................................................................
..................................................................................................................................
..................................................................................................................................

Practical Time

¬¬ Visit the computer lab and practise to turn
on and off your computer system.

¬¬ Observe the options available in the Shut down
or Sign out options and write them below.

................................. .................................
................................. .................................

New Gateway to Computer Science Book - Two 71

Unit : 8

Working with
Paint Brush

Note to Teacher

Take the students to the computer lab and
demonstrate them how to open a paint program.

Tell the students to identify the components of
the paint windows.

Let the students do practice on the paint program
as mentioned in this unit.

72 New Gateway to Computer Science Book - Two

Dear students,
You know that paint brush is a
drawing and painting program
of a computer. You can draw
pictures, and fill color in it as your
requirement. The paint brush
program is also called Microsoft
Paint because it was developed by
microsoftcompanyoftheUSA.Microsoft
Paint is a simple computer graphics
application program.

Opening a paint program

As we discussed in the previous class about the
paint program, here in this class also we will learn
to start the paint program.

Click on the Start button or press the windows key.

Type mspaint on search box.

From the list, click on Paint as given below.

New Gateway to Computer Science Book - Two 73

The Paint window will open, as below.

Components of paint windows:
Title bar

The title bar is located at the top of the paint
windows. It displays the name of a paint file. In the
given picture Quick launch Bar and Untitled-Paint
are located on the title bar.

74 New Gateway to Computer Science Book - Two

Tab
Tab is located just below
the title bar. It has three
tabs they are File, Home and View.
Ribbon
It contains the information of tab like of FILE,
HOME and VIEW. The following is an example of
ribbon available in Home tab.

Drawing area
This is a blank area of paint window where drawing
and painting are possible. We can use various tools
and also insert pictures from the colour box.

New Gateway to Computer Science Book - Two 75

Control Buttons

In the paint windows, we can see

three buttons on the top right Minimize Close
Maximize

side of the screen.

Minimize
When we click in the minimize button, the paint
window becomes small in size.

Maximize
When we click in the maximize button, the paint
window becomes large in size.

Close

When we click in the close button, the paint window
gets closed.

Working with Home Tab
We can create different types of shapes, colour
them and perform various activities with paint. You
need to click on Home tab to see the given box.

76 New Gateway to Computer Science Book - Two

Let’s learn the name of some tools of home tab.

In the above given figure we can see various tools
like select tool, fill with colour tool, text tool, pencil
tool, eraser tool, eye dropper tool, magnifier tool,
paint brush tool, etc.
There are also some shapes like line, curve, circle ,
rectangle, triangle, arrow, star, etc.

Working with shapes

We can draw various shapes
with the help of the above
given box. Let’s identify the
name of the above shapes.
First row contains
Line, Curve, Oval, Rectangle,
Rounded Rectangle, Polygon and Triangle serially.

New Gateway to Computer Science Book - Two 77

Second row contains

Right-angled triangle, Diamond,
Pentagon, Hexagon, Right
arrow, left arrow and Up arrow serially.

Third row Contains

Down row, four-point star,
five point star, Six-point star,
Rounded rectangular, Callout, Oval Callout, Cloud
Callout serially.

To use the shape

Left click over
the required
shape.

Move the mouse
cursor to the
drawing area.

Press the left
mouse button and drag it to see the shape on
the screen as given.

78 New Gateway to Computer Science Book - Two

Colouring the shapes:

We can use colours on the shape with the help of
the colour box. We have to use the fill with colour
tool to fill in the colour on the shape.
Create a shape without colour fill.
Click on the fill with colour tool.
Move the mouse to the colour box and click over

the required colour to select the colour.
Bring the mouse pointer inside the drawing area

and press the left mouse button.
The drawing area gets filled with the colour.

Before colour filling After colour filling

New Gateway to Computer Science Book - Two 79

Practical Time

Draw and colour as given below with the help of
your teacher.

Brushes tool

This tool is used to spray colour
inside the drawing or you can
also freely brush on the drawing
area. When you use this tool it
looks like a colour spray.
You can click on the drop down
arrow of brush and select more styles of airbrush
with different thinness or thickness as below.

80 New Gateway to Computer Science Book - Two

To use brushes
Press the left mouse button

on the Brushes tool.
Move the mouse cursor to

the colour box and select
the colour.
Bring the mouse pointer to the drawing area.
Click and drag the mouse when required to see
the effects as given.

Project Work

Draw and colour as given below with the help of
your teacher.

New Gateway to Computer Science Book - Two 81

Colour picker tool

This tool is used to copy colour from one part of the
drawing to another. The function of colour picker is
same as fill with colour tool.
To use colour picker tool
Create one picture with a colour and next

picture without colour as below.

Click on Colour Picker tool.
Move the mouse inside the first picture and

press left mouse button. (picker tool looks like
a fill with colour tool)
Move the mouse pointer to the next figure and
click the left mouse button inside the picture
to apply the same colour.

82 New Gateway to Computer Science Book - Two

Project Work

Draw the given pictures and use the same colour
to the next pictures with the help of the colour
picker tool.

Rubber tool

This tool is used to erase the part of a picture from
the drawing area which you do not need.
Prepare a drawing with

colour.
Left click on the

rubber tool.
Move the mouse cursor

to the drawing area.

New Gateway to Computer Science Book - Two 83

Press the left mouse button and drag the mouse
on the part of the picture which you want to
remove as above.

Pencil tool

This tool is used to draw pictures with free hand.
You can draw in your own way as you require.
Left click on the pencil tool.
Move the mouse to the drawing area.
Press the left mouse button.
Drag the mouse when required to draw on the

screen as given.
You can press the shift key together while

drawing with the pencil tool so that the line
will be straight.

84 New Gateway to Computer Science Book - Two

Practical Time

Draw the given pictures with the help of the pencil
tool.

Text Tool :

This tool helps to write in the
drawing area. You can type the
text when required.
Left click on the mouse button

over the text tool.
Move the mouse to the drawing area and press

the left mouse button.
A small rectangle dotted boundary will appear

with a cursor as below.
Type the required

New Gateway to Computer Science Book - Two 85

text from the
keyboard in the
text area.
Again press the
left mouse button
on the blank area
to close the dotted
boundary.

Practical Time

Use the text tool and type the given text.

86 New Gateway to Computer Science Book - Two

Saving the file:

After working with the computer, you must save it.
Click on the  File menu.
Select Save or save as option.
A box will appear as below.

You can select the desired folder where you
wish to save the image.

Type the file name and click on the save button.

New Gateway to Computer Science Book - Two 87

Closing the file:

After you complete your work, you have to close the
program. You can use the following ways to close
your file.
Make sure that you have already saved your

documents.
Click on the File menu or tab.
A List will appear as below.

Select Exit option.
Now, you will exit from the paint brush windows.

88 New Gateway to Computer Science Book - Two

Let's Revise

áá A paint brush program is also called as
Microsoft Paint.

áá A paint is a simple computer graphics
application program.

áá The title bar is located at the top of the paint
windows.

áá The quick launch bar is also located at title bar.

áá File, Home and View are called Tab.

áá The ribbon contains the details about file,
home and view tab.

áá The blank area of the paint is called working
area of paint brush.

áá Minimize, Maximize and Close buttons are
called the control buttons.

áá The brushes tool helps to spray the colour
inside the drawing area.

áá The colour picker tool is used to copy the colour
from one part of the image to next image.

áá The rubber tool is used to erase the part of
the picture.

áá The text tool helps to write or type the text
in the drawing area.

New Gateway to Computer Science Book - Two 89

Evaluation Time

1. Fill in the blanks with correct words.

a. Microsoft paint was developed by
…………………… company.

b. A ………………. is a simple computer graphics
application program.

c. …………………… is located at the top of the
paint windows.

d. There are three tabs in paint they are FILE ,
HOME and ………………

e. There are ……………………… types of control
buttons.

f. ……………….. box is used to fill the colour in
the picture.

g. The rubber tool is used to ……………………….
the part of a picture from the drawing area.

90 New Gateway to Computer Science Book - Two

2. Write True for correct and False for the
wrong statements.

a. The paint program is developed
by Microsoft Corporation.

b. The title bar is located at the top of
the paint windows.

c. A blank area of paint windows is
called ribbon.

d. The close button is used to close
the paint windows.

e. We cannot draw shapes on the paint
brush.

f. The brushes tools are used to spray
colour inside the drawing area.

g. We cannot fill in the colour inside
a closed area.

h. The rubber tool is used to insert
text in paint.

i. The pencil tool is used to draw
pictures with free hand.

New Gateway to Computer Science Book - Two 91

3. Answer the given questions:

a. Which company developed a paint program?
.............................................................................................................................................

b. Name any four components of the paint windows.
................................................................... ....................................................................

................................................................... ....................................................................

c. Name the control buttons of the paint windows.
.............................................................................................................................................

d. Name any six tools of the paint windows.

................................................................... ....................................................................

................................................................... ....................................................................

................................................................... ....................................................................

................................................................... ....................................................................

e. What is the use of the brushes tool?
.............................................................................................................................................

92 New Gateway to Computer Science Book - Two

f. What is a colour picker tool?
.............................................................................................................................................

g. What is the use of rubber tool?

.............................................................................................................................................

h. What is a pencil tool?
.............................................................................................................................................

i. What is the use of the text tool?
.............................................................................................................................................

j. How can you close the paint windows? Write
the steps involved in it.

.............................................................................................................................................
.............................................................................................................................................

.............................................................................................................................................

.............................................................................................................................................

.............................................................................................................................................

New Gateway to Computer Science Book - Two 93

Practical Time

Type the text as below.

Kumar’s father has a computer and Lalita’s father has a
mobile phone. Sometimes, Kumar goes to Lalita’s room and
play games on her father’s mobile and Lalita also goes to
Kumar’s room and watches movies on his father’s laptop.

Write any ten lines about your best game in the
paint by using the text tool.
Draw and colour the pictures as given below.

Draw the figure as given below.

94 New Gateway to Computer Science Book - Two

Quiz Section

Circle the correct answer.

1. Which of the following device can work with
battery also?

a. Laptop b. Printer c. Scanner

2. Which of the following is the source of electricity?
a. Battery b. Hard Disk c. Pen drive

3. What are the essential components of the
computer?

a. Mouse, keyboard, CPU, Monitor
b. Keyboard and Monitor only
c. CPU and Mouse only

4. What is the source of electricity for mouse?
a. Printer b. Monitor c. System unit

5. What can you do with the help of the computer?
a. Watch movies b. Listen Music c. Both

6. In which of the following area are computers used?

a. Communication c. Both
b. Medicine

New Gateway to Computer Science Book - Two 95

7. Which of the following is a versatile machine?
a. Computer b. Motherboard c. CPU

8. Which of the following device displays information
on the screen?

a. Monitor b. mouse c. Keyboard

9. Which of the following is an input device?
a. Light Pen b. Printer c. Monitor

10. Which of the following is a storage device?
a. Keyboard b. Hard Disk c. Both

11. In which of the following device can you change
the output?

a. System Unit b. Printer c. Monitor

12. Which of the following is a typing input device?
a. Monitor b. Keyboard c. CPU

13. Which of the following is a special key of the
keyboard?

a. Number Keys b. Alphabet keys c. Shift Keys

14. Which of the following is an audio output device?

a. RAM b. Speaker c. Processor

96 New Gateway to Computer Science Book - Two

15. Which of the following is a handheld pointing
device?

a. Keyboard b. Mouse c. CPU

16. Which of the following is the action of a mouse?

a. Click b. Right Click c. Both

17. For what purpose can you use the computer at
school?

a. Presentation b. Online Banking
c. Advertisement

18. For what purpose can you use the computer at

bank?

a. Signature Verify c. Both
b. Print the statement

19. Which of the following is a drawing program of

the computer?

a. Paint b. Word d. Word Pad

20. Which of the following is the component of a paint
program?

a. Title bar b. Ribbon c. Both

New Gateway to Computer Science Book - Two 97