Class 4 Science Lesson 2 Notes
#Unit -2 Information and Communication Technology
Exercise
1. Choose the correct answer from the options given below for each question.
a) Which of the following is a means of information and communication?
✅ i. Mobile phone
b) From which of the following devices can information can be obtained fastest?
✅ iii. The Internet
c) Which of the following is a mode of one-way communication?
✅ iii. TV
d) Which of the following is a mode of two-way communication?
✅ iii. Telephone
2. Tick (√) the correct statements and cross (x) the wrong ones.
a) Computer is a means of information and communication. (√)
b) Information can flow quickly through the letter. (X)
c) Mobile phone is a traditional means of communication. (X)
d) Information can be collected from newspapers daily. (√)
3. Fill in the blanks by choosing the appropriate word from the words given below:
Means, two-way, one-way, information, communication
a) Meaningful information of anything is information.
b) The exchange of information from one person to another is communication.
c) The information received from the school notice board is a one-way communication.
d) Group discussion in the classroom is a two-way communication system.
4. Answer the following questions in brief.
a) Why is the information needed in daily life?
👉Information is needed in daily life because it helps us make decisions, learn new things, and stay updated about what is happening around us.
b) How is information transmitted from one place to another?
👉Information is sent through letters, phones, newspapers, TV, or the internet.
c) Write the names of any four means of information and communication.
👉The names of any four means of information and communication are:
- Mobile phone
- Television
- Newspaper
- Computer
d) Neha is in school. If she has to call her mother to school immediately, what medium would she use, and why?
👉Neha should ask her teacher for help and use a telephone or mobile phone to call her mother.
e) Explain how the use of information and communication makes daily work easier.
👉Information and communication help us know things quickly and share messages easily. We can talk to others, get news, and learn new things without going far. This saves time and helps us do our work better and faster.
f) Write down whether each tool shown in the picture provides one-way or two-way communication.
👉They are as follows:
Envelope (Letter) – One-way communication
Radio – One-way communication
Mobile phone – Two-way communication
Computer – Two-way communication (when used for email, chatting, etc.)
g) Write the similarities and differences between the information obtained from newspapers and television.
👉The similarities and differences are given below:
Similarities:
- Both give us news and useful information.
- Both help us learn about events happening around the world.
Differences:
- Newspapers give written news, while television shows pictures and sound.
- Newspapers are read, but television is watched.
- Television can give live news, but newspapers cannot.
Exercise
1. Choose the correct answer to the following questions:
a) How many main components does a computer have?
✅ ii. three
b) Why is the system unit called the brain of the computer?
✅ iii. because it processes data and controls other parts
c) Which of the following is an output device?
✅ iii. Monitor
d) Which of the following is a storage device?
✅ iii. hard disk drive
2. Select the suitable words from the list of words given below and fill in the gaps.
gently, buttons, many, clothes, information, back, wires, left, make noise
a) Computer can remember many things at once.
b) We type by pressing the buttons on the keyboard.
c) The buttons on the keyboard should be pressed gently.
d) Do not make noise in the computer lab.
e) Computer should be cleaned by wiping it gently with a clean clothes.
f) Wires in the CPU must not be pulled.
g) Sit in front of the computer with a straight back.
3. Tick (√) the correct statements and cross (x) the incorrect one.
a) Words can be typed by pressing keys on the keyboard. (√)
b0 Pictures can be drawn with the help of a mouse. (√)
c) A computer can only do one task at a time. (X)
d) Naked wire should not be touched. (√)
e) You should play and jump in the computer lab. (X)
f) Computers like dust. (X)
g) Mouse buttons should be pressed gently. (√)
h) You can eat and drink in the computer lab. (X)
4. Match the parts of the commuter to its functions:
i) Keyboard → b. Typing device
ii) Mouse → a. Cursor control device
iii) Hard drive → d. Storage device
iv) System unit → c. Control unit
5. Answer the following questions in brief.
a) What is a computer?
👉A computer is an electronic machine that takes input from us, process it and gives us meaningful information.
b)What do you use the computer for?
👉We use the computer for studying, playing games, watching videos, drawing pictures, and getting information.
c) Write the names of two storage devices.
👉The names of any two storage devices are:
i) Hard disk
ii) Pen drive
d) Write the difference between monitor and keyboard.
👉 A monitor shows pictures and information.
A keyboard is used to type letters and numbers.
e) Name the buttons on the mouse.
👉 Left button, right button, and scroll wheel
f) Write down any four functions of a computer.
👉Any four functions of a computer are:
i)Typing
ii)Drawing
iii)Playing games
iv)Watching videos
g) Write down four ways to use a computer safely.
👉The four ways to use a computer safely are:
- Sit properly
- Do not eat or drink near the computer
- Press keys gently
- Keep the computer clean
h) Why should a computer be cleaned?
👉A computer should be in order to keep it working properly and protect it from dust and damage.
i) How is a computer cleaned?
👉Computer is cleaned by wiping it gently with a clean, soft cloth and keeping dust away.
j) What are the effects of not sitting properly while using a computer?
👉 It can cause back pain and make you feel tired or uncomfortable.
k) You have a keyboard, monitor and CPU separately. With these, how would you build a computer system for yourself?
👉I would connect the monitor, keyboard, and mouse to the CPU using wires or ports. Then I would plug in the power and turn it on.
l) Write down the precautions to be taken while using a mobile phone and computer.
👉The precautions to be taken while using a mobile phone and computer are:
- Do not use for too long
- Keep your eyes at a safe distance
- Use clean hands
- Do not use while charging
m) Identify the computer parts shown in the picture below and write their names:
👉 First picture – CPU (Central Processing Unit)
Second picture – Monitor
Third picture – CD/DVD (Compact Disc)
Fourth picture – Mouse Fifth picture – Keyboard
6. Give the reason:
a) Computer is called a smart machine.
👉Computer is called a smart machine because it can do many tasks quickly, like solving problems, saving information, and following instructions.
b) The keyboard is called the input device.
👉The keyboard is called the input device because we use it to enter letters, numbers, and commands into the computer.
c) The system unit is called the brain of the computer.
👉 The system is called the brain of the computer because it controls all the parts of the computer and processes the information.
Exercise
1. Choose the correct answer to the following questions:
a) What is used for drawing colored pictures on the computer?
✅ ii. paint software
b) Which of the following is paint software?
✅ i. tux paint
c) Which tool is used to create different shapes?
✅ i. shapes tool
d) Which tool is used to draw colored lines in Tux Paint?
✅ iii. magic tool
2. Fill in the blanks by selecting the appropriate word from the words below:
Typing, Picture, Eraser tool, Shape tool
a) Eraser tool is used to remove a part of the picture you have drawn.
b) In Tux Paint, Shape tool is used to make different shapes.
c) Typing software is used to increase typing skills.
d) A Picture can be made on the computer using Tux Paint.
3. Answer the following questions in brief.
a) What is Paint software used for?
👉Paint software is used for drawing, coloring, and making pictures on the computer.
b) What is typing software used for?
👉Typing software is used to practice and improve typing skills on the keyboard.
c) What is the difference between paint software and type softwarе?
👉 Paint software is used to draw and color pictures.
Typing software is used to learn how to type letters and words.
d) Draw the following pictures in Tux Paint, add suitable color to them and then save them on the computer:
i) Picture of a flower
ii) Picture of a mango
iii) Picture of a house
iv) Picture of a computer
e) Type two paragraphs about your favorite animal and save them on the computer.
👉Example Paragraph (for inspiration):
My Favorite Animal – Dog
I like dogs because they are friendly and loyal. Dogs are very smart and can be trained easily. They guard our homes and love to play with us.
Dogs have sharp ears and a strong sense of smell. They are of many breeds and sizes. I have a pet dog at home named Bruno. He is my best friend.
Exercise
1. Fill in the blanks:
web browser, computer, Omni, desired content, Internet
a) Using the Internet, we can search for the desired content.
b) To search for information on the Internet, we have to open the web browser first.
c) To search for the information on the Internet, we have to type the desired subject in the Omni bar.
d) Google Chrome is a web browser.
2. Choose the correct option.
a) What is Safari?
✅ i. Web browser
b) Which language should be used for typing on the Omni bar?
✅ iii. Language of our choice
c) What network does the Internet connect to?
✅ iii. Computer
d) What can be found through a web browser?
✅ iii. Both photo and video
3. Match the following.
Microsoft Edge → iii. Web browser
Networking → i. Internet
Play Store → iv. App download
YouTube → v. Video
