Samacheer Kalvi Class 6 Science Solutions Term 1 Chapter 7 Computer An Introduction

I. Choose the Correct Answer:

 

Question 1. Who is the father of computer?
(a) Martin Luther King
(b) Graham Bell
(c) Charlie Chaplin
(d) Charles Babbage
Answer: (d) Charles Babbage
In simple words: Charles Babbage is known as the "Father of the Computer" because he designed the analytical engine, which laid the foundation for modern computers. His visionary ideas helped create the basic structure of how computers work today.

🎯 Exam Tip: When identifying historical figures for inventions, focus on their key contributions that revolutionized a field.

 

Question 2. Which of the following is another form of computer?
(a) Blackboard
(b) Mobile
(c) Radio
(d) Book
Answer: (b) Mobile
In simple words: A mobile phone is a small computer that you can carry in your pocket. It can do many things like call people, browse the internet, and play games, just like a bigger computer.

🎯 Exam Tip: Think about everyday devices that can perform calculations, store data, and run programs to identify forms of computers.

 

Question 3. When was the first computer introduced?
(a) 1980
(b) 1947
(c) 1946
(d) 1985
Answer: (c) 1946
In simple words: The first electronic general-purpose computer, ENIAC, was built in 1946. This marked an important start for the age of modern computing.

🎯 Exam Tip: Remember the year 1946 as a significant milestone in computer history for the introduction of the ENIAC.

 

Question 4. Who is the computer's first programmer?
(a) Lady Wellington
(b) Augusta ado Lovelace
(c) Mary Curie
(d) Mary Comb
Answer: (b) Augusta ado Lovelace
In simple words: Augusta Ada Lovelace was the first person to write instructions, or programs, for Charles Babbage's analytical engine. Her work showed how computers could do more than just simple calculations.

🎯 Exam Tip: Associate Augusta Ada Lovelace with her pioneering role in developing algorithms and being recognized as the first computer programmer.

 

Question 5. Pick out the odd one?
(a) Calculator
(b) Abacus
(c) Flash Card
(d) Laptop
Answer: (c) Flash Card
In simple words: A flash card is simply a piece of paper used to help you remember things, while the other options are devices that can calculate or process information. Flash cards do not process data like the others.

🎯 Exam Tip: When asked to pick the odd one out, identify the common characteristic among most items and then find the one that doesn't share it.

II. Fill in the Blanks:

 

Question 1. Data is ......... Information.
Answer: Processed.
In simple words: Data that has been made useful is called processed information. Raw facts are given meaning after processing them.

🎯 Exam Tip: Remember that "data" refers to raw facts, while "information" is data that has been processed and made useful.

 

Question 2. World's first general purpose computer is .........
Answer: Electronic Numerical Integrator and Computer.
In simple words: The very first computer made for many different uses was called ENIAC. It was a very big machine.

🎯 Exam Tip: Know that ENIAC stands for Electronic Numerical Integrator and Computer, representing a key moment in computer history.

 

Question 3. Information is ......... data.
Answer: a form of processed.
In simple words: Information is data that has been changed or organized to make it meaningful. It is data that makes sense to us.

🎯 Exam Tip: Understand that information is not raw data, but rather data that has been cleaned, organized, and presented in a useful way.

 

Question 4. Fifth generation computer has .......... Intelligence.
Answer: Artificial.
In simple words: The newest computers, called fifth-generation, can think and learn like humans. This is called Artificial Intelligence, and it helps computers understand and respond to human language.

🎯 Exam Tip: Connect "fifth generation" with "Artificial Intelligence" (AI), which aims to make computers think and learn like people.

 

Question 5. ....... is the device that uses Index number.
Answer: Analog Computer.
In simple words: An analog computer works with things that change smoothly, like temperature or pressure. It uses physical properties or measurements instead of counting numbers directly.

🎯 Exam Tip: Differentiate between analog computers (which use physical quantities and continuous data) and digital computers (which use discrete numbers).

III. State True or False:

 

Question 1. The computer is an Electronic device.
Answer: True.
In simple words: A computer uses electricity to work. It has many electronic parts inside that help it do its jobs very quickly.

🎯 Exam Tip: Recognize that all modern computers rely on electrical signals and components to function, making them electronic devices.

 

Question 2. Sir Isaac Newton invented the Computer.
Answer: False.
In simple words: Sir Isaac Newton was a famous scientist who discovered gravity, but he did not invent the computer. Charles Babbage is known as the father of modern computing.

🎯 Exam Tip: Be sure to correctly associate inventors with their inventions; Charles Babbage is credited with the foundational concepts of the computer, not Isaac Newton.

 

Question 3. The computer can do calculations fast.
Answer: True.
In simple words: Computers are very good at doing math problems and calculations super fast. They can do many sums in a second.

🎯 Exam Tip: Understand that a computer's primary strength is its speed and accuracy in performing complex calculations and data processing.

IV. Match the Following:

 

Question. Match the following:

Answer:
1. First generation Computer - c. Vacuum tubes
2. Second generation Computer - d. Transistor
3. Third generation Computer - b. Integrated Circuit
4. Fourth generation Computer - e. Micro processor
5. Fifth generation Computer - a. Artificial Intelligence
In simple words: Each generation of computers used a new main technology that made them smaller, faster, and more powerful. From big vacuum tubes to tiny microprocessors and even smart AI, technology kept getting better.

🎯 Exam Tip: To score full marks in matching questions, it is crucial to clearly list each correct pair, ensuring you align the item from the first column with its corresponding match from the second.

V. Answer the Following:

 

Question 1. What is a Computer?
Answer: A computer is an electronic device that takes in data, processes it, and then gives out useful information based on our needs. Computers can do many tasks very quickly and accurately. This device is very helpful for doing different kinds of work like writing, drawing, and calculating.
In simple words: A computer is an electronic machine that takes information, changes it, and then shows us the results. It helps us do many tasks.

🎯 Exam Tip: Define a computer by its core functions: input, processing, and output, and emphasize its electronic nature and ability to process data.

 

Question 2. Who are the pioneers/forerunners of computers?
Answer: The main pioneers of computers are:
1. Charles Babbage: He was a mathematics professor who designed an early computer called the analytical engine. He is widely known as the father of modern computers because his ideas formed the basis of today's machines.
2. Augusta Ada Lovelace: She was the first programmer. She created important instructions and commands for mathematical operations to be carried out by Babbage's analytical engine. Her work was a breakthrough in showing how computers could follow complex sets of instructions.
In simple words: Charles Babbage is the father of computers, and Augusta Ada Lovelace was the first computer programmer. They both helped create the first ideas and plans for computers.

🎯 Exam Tip: Clearly state the contributions of both Charles Babbage and Augusta Ada Lovelace, highlighting Babbage's design and Lovelace's programming innovations.

 

Question 3. Write a short note on Data.
Answer:
1. Data refers to raw, unorganized facts and figures that need to be processed to become meaningful information. These can be simple observations or measurements.
2. Data can be in different forms, such as numbers, letters of the alphabet, or images. For example, a list of student names and their marks is data until it is processed to find the average score.
In simple words: Data is just raw facts like numbers or names. It's not organized yet, but it can be made useful later.

🎯 Exam Tip: Remember that data is raw and unprocessed, while information is data that has been processed and given meaning.

 

Question 4. Name any four input devices.
Answer: Four common input devices are: Keyboard, Mouse, Bar code reader, and Digital camera. These devices help us put information into the computer.
In simple words: Input devices are things you use to put information into a computer, like a keyboard to type or a mouse to click.

🎯 Exam Tip: Provide a diverse list of input devices, including both common (keyboard, mouse) and specialized (bar code reader, digital camera) examples.

 

Question 5. Differentiate Hardware and Software.
Answer:
Hardware: These are the physical parts of a computer that you can see and touch. Hardware helps the software run and perform tasks. For example, the screen, keyboard, and mouse are all hardware.
Software: These are the programs and instructions that tell the computer what to do. You cannot touch software, but it makes the hardware work. For instance, the games you play or the applications you use are software.
In simple words: Hardware is the computer parts you can touch, like the screen. Software is the programs that make the computer work, like a game.

🎯 Exam Tip: Clearly distinguish hardware as physical components and software as programs or instructions, providing examples for each to illustrate the difference.

VI. Answer in Details:

 

Question 1. Explain in detail the Applications of the computer.
Answer: Computers are used in many different places and for many different tasks, making our lives easier and more efficient. Here are some applications:
1. Textile shops: Computers are used in textile shops to manage billing and keep track of sales and inventory. This helps businesses run smoothly.
2. Railway stations: At railway stations, computers are essential for issuing tickets, managing train schedules, and controlling signals for safe travel.
3. Banks: Banks use computers for a wide range of tasks, including managing customer accounts, processing transactions, and providing various banking services.
4. ATMs: Automated Teller Machines (ATMs) are computer-controlled machines that allow people to withdraw cash, deposit money, and check their account balances at any time.
5. Post office: Post offices use computers for tasks like tracking parcels, managing mail delivery, and handling postal services efficiently.
In simple words: Computers help us everywhere, like in shops for bills, at train stations for tickets, in banks to manage money, at ATMs for cash, and in post offices to send letters. They make many jobs easier.

🎯 Exam Tip: When listing applications, aim for a diverse set of examples from different sectors (retail, transport, finance, public services) to show a broad understanding of computer usage.