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Ball mouse

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Input

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Scroll wheel helps the user in moving the pages up or down.

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A computer mouse is a pointing device, which is connected to the CPU with a long wire.

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Pressing and releasing the left mouse button twice called double click.

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Touchpad is also known as trackpad. It is a small, flat surface that is used to move the cursor, by using the motions of the user's finger over it.

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Trackball mouse is a movable ball that can be rotated using your fingers or palm.

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The right button of the mouse helps us to perform some quick tasks with the options on the monitor.

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A computer mouse is a pointing device. It has three buttons - right click button, left click button and a scroll wheel. It moves the pointer to point, click, drag and select items on the screen.

Click can be of two types:

• Single click: Pressing and releasing the left mouse button once called single click.
• Double Click: Pressing and releasing the left mouse button twice called double click.

Dragging - Dragging means moving the mouse on screen while keeping the left mouse button pressed.

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A computer mouse allows us to drag an item to move it to the new place.

The steps to click and drag are as follows:

1. Locate the Recycle bin icon.

2. Place the cursor on top of the icon and left click the mouse button and hold it on the icon.

3. Drag the icon to another place on the screen.

4. Now, release the left click button.

5. We would see that the icon moves to a new place.

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A ball mouse has a rubber ball at the bottom. When the ball is rolled in any direction on a flat surface, the mouse pointer also moves in the same direction. Today, a ball mouse has been replaced by the optical mouse.

An optical mouse has no ball at the bottom. It has an optical LED sensor at the bottom, which is used to detect the mouse movement.

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A scroll mouse has two buttons and a scroll wheel. The scroll wheel is in the middle of the left and right button of the mouse.

• Left button is used for left clicking.
• Right button is used to perform some quick tasks with the options.
• The scroll wheel is used to move the pointer up or down.

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(Answer may vary)

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Mouse pad

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Desktop

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Clean

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Improper

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Palmtop

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Computer

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Desktop

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Personal Computers (PC)

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Universal Automatic Computer

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Monitor

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Input – Process – Output

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Three

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Information

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Computer

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CPU stands for Central Processing Unit. It is the most important part of the computer. It is also known as the brain of a computer.

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Steps to switch on a computer are:

Step1: Switch on the main power supply button.

Step2: Switch on the power button of UPS.

Step3: Now, switch on the power button on CPU.

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UPS stands for Uninterrupted Power Supply. It keeps the computer on for some time even after the electricity goes off.

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Abacus – It was the first computing device used for basic calculations like addition and subtraction.

Mark 1 - It was the first automatic digital computer and was large in size. It was made in 1940s.

UNIVAC 1 – It stands for Universal Automatic Computer. It and was faster than the previous computers. This computer was made in 1950s.

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Charles Babbage was an English Mathematician who invented modern day computer and is known as the father of computer.

His inventions are as follows:

1. Difference engine - It was made by Charles Babbage in 1820s. It was designed to perform calculation without human intervention.

2. Analytical engine - It was another computing device invented by Charles Babbage in 1840s to perform calculation without human intervention.

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The Image given is of palmtop computer.

Palmtop Computer – It is a computer which is much smaller, thinner and lighter than the laptop. We can easily carry it in our pocket as well.

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Antarctica

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Marley

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Hachiko

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Elsa

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Eight Below

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Life of Pi

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Toad

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Tortoise

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Crocodile is olive green or brown in colour.  Its teeth are visible even when its jaw is closed. Crocodiles are more aggressive as compared to alligators.

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a. Toads

b. Turtles

c. Hare

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a. False

Turtle spends most of its life in water.

b. True

c. False

Crocodile is more aggressive as compared to alligators.

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a. RABBIT

b. TORTOISE

c. TOAD

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a. Hare

b. Turtle

c. Alligator

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Hare

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a.   Indosuchus

b.   Ostrich dinosaur

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a. Gasosaurus

b. Baryonyx

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Shell

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Scales

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Hooves

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Laptop Computer – It is a compact computer and smaller and thinner in size and can be carried easily anywhere with us.

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The given image is of a desktop computer.

Desktop Computer - It is a computer which is large in size and consists of many devices like monitor, CPU, keyboard and mouse. We cannot carry such computers with us.

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The five parts of a computer system are:

1. Monitor
2. Central Processing Unit (CPU)
3. Keyboard
4. Mouse
5. Speakers

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Input – The data entered by a user into a computer is known as input.

Process – Time taken by a computer to work on the given data is known as process.

Output – The final result that comes out in the form of information is known as output.

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Mouse

Mouse is an input device which is used to input instructions with a pointer on the screen.

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Keyboard

Keyboard is an input device which is used to enter the data into a computer.

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CPU stands for Central Processing Unit. It is the processing unit of a computer where data entered as an input is being processed for the final output.

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The steps that we should follow while turning off the computer are as follows:

Step1: Click on the Start button on your desktop.

Step2: Select the Turn off computer option from the menu list.

Step3. Click on the Turn Off button.

Step4: Switch off the power button on the UPS.

Step5: Switch off the main power supply button.

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The three manners that we must follow in a computer room are as follows:

1. Remove your shoes before entering the computer room as dust is harmful for computers.

2. Do not drink or eat on your computer table.

3. Do not sit very close to monitor as it is harmful for your eyes.

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Published

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Printouts

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Games

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Homework

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Electronic

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The three uses of computer in banks are as follows:

a) In banks, computer is used to maintain the accounts of customers.

b) It is used to withdraw money from ATM.

c) It is also used for online banking.

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The three uses of computer in hospitals are as follows:

a) Computer helps the doctors during operations.

b) Computer helps in preparing medical reports.

c) Computer helps the doctors in diagnosing the disease of the patient.

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Computer helps the teachers to teach students and it also helps in making report cards.

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The two things that we can learn with the help of computer are:

1. Cooking

2. Gardening

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The various uses of computer in space research and defence are as follows:

a) It is used for launching satellites and rockets.

b) It helps in space research.

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True

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Space bar

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Enter key

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There are 26 alphabet keys on the keyboard.

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Number

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The arrow keys are the main navigation keys on the keyboard. Arrow key is used for moving cursor on the monitor screen.

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Function keys are located at the top of the keyboard.

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Keyboard is one of the primary ways to communicate with the computer.

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Alphanumeric keys are a combination of alphabets and numbers.
These are used to type letters, numbers and words. There are 26 alphabet keys on the keyboard. These are present in the middle of the keyboard.
Number keys are located at two places on a keyboard. These are marked with numbers 0-9. On the right side, a numeric pad is present. This pad is similar to calculator. The keypad contains numbers along with mathematical signs and enter key. Num Lock key is present on top of the keypad. The keys of this keypad work only when the Num Lock is turned on.

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Some of the good practices that should be followed while using the keyboard are as follows:

1. Keep the keyboard clean and tidy.
2. Center your keyboard in front of you.
3. Unfold the feet of your keyboard before you start using it.
4. Do not press the keys of the keyboard too hard.
5. Do not keep anything on the keyboard like books, spectacles etc.

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Stamp tool

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Toolbox

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Shape

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Selector

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Thumbnail

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Eraser tool is used to erase a part of the picture. There are number of eraser sizes available. To erase a part of the picture, click on the Eraser tool. Click and drag over the canvas to erase the picture.

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This is a paint brush tool used to draw free-form lines. It has different types of brushes.

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Tux Paint is a drawing program for young children. It helps the children to draw and colour pictures.

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To open an existing file that has been saved, the steps are as follows:

• Click on Open.
• The saved pictures are displayed in the thumbnail.
• Now, double click on the picture to open it.

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Stamp tool has many stickers. It allows us to paste the stickers on the picture. It helps us to make a colourful drawing.

There are varieties of stamps available in Tux Paint. For example, animal, plant, vehicle, etc. By using colour, we can also change the tint of the pasted stamp before placing it.

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Primitive

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Antlers

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Vampire bat and snakes

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Jellyfish

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1. Steering Wheel, Cars/bus/trucks.

2. Turbines, electricity

3. Ferris Wheel, Amusement parks.

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1.     Water wheels

2.     Ferris Wheel

3.     Steering Wheel

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a. High-speed train

b. Metro train