8th Std Science Term 1 Solution in English | Lesson.9 Introduction to the Information Age

 8th Std Science Term 1 Solution in English | Lesson.9 Introduction to the Information Age

Lesson 9. Introduction to the Information Age

I. Choose the correct answers:

1. Who is the father of computer?

1. Martin Luther King
2. Graham Bell
3. Charlie Chaplin
4. Charles Babbage

Ans : Charles Babbage

2. Which one of the following is an output device?

1. Mouse
2. Keyboard
3. Speaker
4. Pendrive

Ans : Speaker

3. Which one of the following is an input device?

1. Speaker
2. Keyboard
3. Monitor
4. Printer

Ans : Keyboard

4. Pen drive is ____________device.

1.  Output
2. Input
3. Storage
4. Connecting cable

Ans : Storage

5. Fifth generation computer has ___________ Intelligence.

1. Transistors
2. Integrated Circuits
3. Microprocessor
4. Artificial Intelligence

Ans : Artificial Intelligence

II. Match the following

1. Keyboard	RAM
2. Fourth generation Computer	Input device
3. Hardware	Integrated Circuits
4. Third generation Computer	Drawing tools
5. Application Software	Microprocessor
Ans : 1 – b, 2 – e, 3 – a, 4 – c, 5 – d

III. Give short Answer

1. What t is a Computer?

Computer is an electronic device storing processes data  typically in binary from, according to instructions given to it in a variable program

2. Name the parts of a computer

• Input Unit
• Central Processing Unit (CPU)
• Output Unit

3. What is Hardware and Software?

Hardware

Hardware is the parts of a computer which we can touch and feel. Hardware includes Input and Output devices, Cabinet, Hard Disk, Mother Board, SMPS, CPU, RAM, CD Drive and Graphics Card.

Software

Hardware is lifeless without software in a computer. Softwares are programmed and coded applications to process the input information. The software processes the data by converting the input information into coding or programmed language. Touching and feeling the software is not possible but we  can see the functions of the software in the form of output.

4. Define Generation of Computers.

GENERATION	PERIOD	MAIN COMPONENT USED
1. First generation	1942-1955	Vacuum tubes
2. Second generation	1955-1964	Transistors
3. Third generation	1964-1975	Integrated Circuits( IC)
4. Fourth generation	1975-1980	Microprocessor
5. Fifth generation	1980 – till date	Artificial Intelligence

5. Describe the components of the Central Secretariat (CPU)

CPU is the brain of the Computer. Th e data is processed in the CPU. The CPU has namely three parts.

1. Memory Unit
2. Arithmetic Logic -Unit (ALU)
3. 3. Control Unit

Control Unit

The control unit controls the functions of all the parts of the computer.

Arithmetic Logic Unit

Arithmetic and Logic unit performs all the arithmetic computations like addition, subtraction, multiplication and division.

Memory Unit :

The memory unit in the computer saves all data and information temporarily. We can classify memory unit into two types namely primary and secondary memory. Memory can be expanded externally with the help of Compact Disk (CD), Pendrive, etc.