Hardware Components 1. 1. 1 What is hardware? It’s a word used to describe devices. It’ the part of the computer system you can touch or see it. 1. 1. 2 What is software? Anything that can be stored electronically is software. 1. 1. 3 Complete the following table – put a “y” in the correct column Name of Item Hardware Software Something Else Screen V Keyboard V Sony Playstation Game V Toaster V Operating system V Video V Printer V CD or DVD V Ringtone V Word processing program V This worksheet V ? Writing 1. 2. 1 Fill in this table: Put a number from (1) to (4) for in each box.
Put (1) for the most expensive, most portable biggest and (4) for the least expensive, least portable and smallest. Give an example of at least one use for each type of computer. Category Mainframe Personal (P. C. ) Laptop PDA Cost 1 4 2 3 Portability Storage Capacity 1 Use use as a clock, calendar and accessing the Internet Find a picture of each type of computer and paste them here. Mainframe (P. C. ) Laptop PDA ? Writing 1. 3. 1 Define a peripheral device It’s an input, output or storage device that can be connected to the CPU. 1. 3. 2 List all the peripheral devices you can see in this room.
Scanner, print, mouse, keyboard and monitor. 1. 3. 3 List at least five more peripheral devices you know about Zip disk, speaker, plotter, screen, joysticks. Find some pictures of peripheral devices and paste them here. Mouse keyboard monitor scanner 1. 4. 1 What does the term input mean when referring to a computer system? Input is the data you give to the computer. 1. 4. 2 From your list of peripherals, which ones are input devices? Mice, keyboard, scanner, light pens, joysticks. 1. 4. 3 Describe the following input devices and explain what they are used for: Input Device
Description and Use Keyboard A Keyboard is an arrangement of rectangular buttons, or keys, it could be used to enter words and figures. Mouse A mouse consists of a small case, held under one of the user’s hands, with one or more buttons; it could be used to select icons to run programs or select items. Touch pad A touchpad is an input device commonly used in laptop computers. Tracker ball A tracker ball is an input device where a finger is used to rotate a ball. Joystick A joystick is a personal computer peripheral or general control device consisting of a handheld stick.
Joystick is often used to control video games, and usually has one or more push-buttons whose state can also be read by the computer. Microphone A microphone, sometimes referred to as a mike or mic It’s used in many applications such as telephones, tape recorders, hearing aids, Scanner A scanner is a device that analyzes images, printed text, or handwriting, or an object. Its used to input pictures or texts. Digital Camera A digital camera is an electronic device used to take and store photographs digitally. Webcam A webcam is small camera, it could used record or see each other through it. Digitiser
Sensor A sensor is a type of transducer. Sensors are used in everyday life. Applications include automobiles, machines, medicine and industry. Touchscreen A touchscreen is display overlays which have the ability to display and receive information on the same screen. Light Pen A Light Pen is a pointing device shaped like a pen. It allows the user to point to displayed objects, or draw on the screen. 1. 5. 1 What does “output” mean? Output is the information the computer gives back after processing. 1. 5. 2 From your list of peripherals, which ones are output devices? Print, speaker, Plotter, screen.
1. 5. 3 Describe the following output devices and explain what they are used for. Output Device Description and Use Monitor (VDU) A monitor is a piece of electrical equipment which displays viewable images. Printer A device that prints text or illustrations on paper. Plotter A plotter is a vector graphics printing device that connects to a computer. Speakers Speaker is an electromechanical transducer that converts an electrical signal into sound. 1. 5. 4 Fill in this table comparing the three main types of printer, dot matrix, ink jet and laser. Put a number from (1) to (4) for in each box.
Put (1) for the most expensive, noisiest, fastest and best quality and (4) for the least expensive, least noisy and slowest and lowest quality. Tick the ones which can print in colour. Category Dot Matrix Ink Jet Laser Cost 3 4 1 Noise Speed 1 Quality of Print 1 Colour or B/W V V 1. 6. 1 What are the two main types of computer memory? RAM and ROM 1. 6. 2 What does RAM stand for? Random Access Memory 1. 6. 3 What does RAM hold? It holds data, system software and application programmes. 1. 6. 4 What does ROM stand for? Read Only Memory 1. 6. 5 What does ROM hold? It holds basic programmes. 1. 6.
6 What does “volatile” mean? Volatile means something changing or changeable 1. 6. 7 Which memory is volatile? RAM 1. 6. 8 Write RAM or ROM in the first column. RAM or ROM Volatile? Read/Write? Holds … RAM Yes Read + Write Data and Programs ROM No Read only Start up instructions 1. 6. 9 Fill in the blanks in these equations 8 bits = 1 byte 1000 bytes = 1 kilobyte 1000 kilobyte bytes = 1 megabyte 1000 megabytes = 1 gigabytes 1000 gigabytes = 1 _____________ 1. 6. 13 Look at the following table about Backing Storage. Fill in the blanks. Name of device Volatile? y/n Storage Capacity Optical or Magnetic?
Read/ Write? Other (speed/ cost / use) Floppy Disk Drive N 1. 44 Mb Magnetic Read + Write 21. 5 p Hard Disk Drive N 40 Gb Magnetic Read + Write 0. 15 p stores data on one or more rigid, flat, disks Magnetic Tape N Magnetic Read only Used to back up data stored on hard disk CD ROM Y About 675 Mb optical Read only Uses to store computer data. CD – R Y Optical Write once read many Stores audio CD – RW Y About 670 Mb optical Read + Write creates data and audio CDs. DVD Y 4. 7 Gb optical Read only Stores ; compress video data DVD-RW Y 1. 46 Gb optical Read +write Uses to hold data that can be rewritten.