JK-TK/GRADE-8-TERM-2 huggingface dataset:
A computer mouse can be used to make toys, soap dishes, toothbrush holders and Christmas tree decorations. Obsolete and dysfunctional input devices can be sent to recycling facility where they will be recycled to make new products. Output Devices. Processed data can be given out in form of audio, text, pictures, graphics or videos. Output devices are used to give out information from the computer. Output devices of a computer. Output devices are peripheral devices that give out information from a computer to the user. Examples of output devices are: monitors, printers, actuators, plotters, speakers, earphones and projectors. Functions of Output devices. MonitorIt displays data in text and graphics. Speakers. Gives information in form of sound or audio. Headphones earphones. Produce audio information. Printers. Produce text or picture on paper. Projectors. Gives visual information by projecting it on a flat smooth like wall or a white board. Plotters. Produces digital created graphics and drawings. A plotter uses a pen to draw lines on paper. Actuators. A part of a device or machine that helps to create physical movement using signals from a computer. Braille embosser. A device that presses dots onto paper for people with visual impairment to read using their fingers. Categories of Computer Output devicesSoftcopy output devices. They give intangible output in form of text, audios and videos. These devices include; monitors, speakers and projectors. Hardcopy output devices. They give tangible output that is in form of printed text or graphics. Examples of hardcopy output devices are printers and plotters. Advantages and disadvantages of Softcopy and Hardcopy output. Advantages of hardcopy Disadvantages of hardcopyIt is considered permanent data as editing It is expensive to produce as it requires and changing is not easy. Paper, ink and printer. It does not need electricity, special devices It is not easy to move from one place to or software to display show another. When properly stored it is not easily lost It requires a lot of physical storage space. It is not subjected to data stealing and cyber It can be stolen or destroyed through wearattacks and tear or be subjected to factors such asfire and water. Advantages of softcopy Disadvantages of softcopyIt is easy to move from one place to It is vulnerable to cyber and data stealing. Another.
A nonvolatile memory used to store data in computers, digital cameras, universal serial bus, flash drives and mp3 players. Data in flash memory can be electrically erased and new data stored in it. Location of Fixed storage devices in a computer. Some fixed storage devices in a computer such as the hard disk and solid-state drive are usually found in the drive bay of the computer case or on underside of a laptop. Some solid-state drives are embedded on the motherboard. Internal flash drives are mostly located in small portable devices such as mobile phones and cameras. How data is stored Written and retrieved read from fixed storage devices. Writing data or saving data means storing data. Data is written on a fixed storage device by:Creating new files. Downloading. Copying or moving files and saving them in a computer storage device. Reading Data, retrieving data or opening data is same as getting data back from its location. When data is opened or a file is accessed in a fixed storage device then the data is read. Give the advantages and disadvantages of Fixed storage devices in a computer. The following table clearly gives the advantages and disadvantages of Fixed storage devices. How to manage waste from fixed storage devices:Always reuse the devices if still in good conditions or sell at a lower price. Return the device its manufacturer for reuse or recycling. Take the device to an e-waste management center for recycling and proper disposal. Removable storage devicesThese are portable storage devices that are not housed or fixed inside the computer case. The have to be connected or attached to a computer system through a port so that data can be read from or written to them. They can be used for backup and store and transfer of data from one computer to another. Types of Removable storage devices. External hard drives. Universal Serial Bus USB Flash drive. Memory drives. Memory cards. Compact discs CDs . Digital versatile discs DVDs . Blu-ray discs. Removable storage devices are used in a computing environment because:They are portable and can be used for transporting data and information from one computer to another. They can be used to back up data away from the computer in case the original data is lost or damaged. They can be read from or written to easily without affecting the operations of the computer. They enable sharing of information and data among computer users. They can store and be used to install critical applications like operating system in a computer.
They can be read from or written to easily without affecting the operations of the computer. They enable sharing of information and data among computer users. They can store and be used to install critical applications like operating system in a computer. Factors to consider when selecting a removable storage device for use:Advantages of removable storage devices over fixed storage devices. Easy transfer of data and sharing between computer and users. Portable-can store data while outside or not attached to a computer. Easily read from and written to. 1.3-Consumer and Investor Protection. Consumer protection refers to measures by either the government of NGO or consumers to avoid exploitation of consumers by business people. It is a deliberate attempt to safe guard consumers against exploitation or malpractices in business. Investor protection -Importance of consumer protection. Prevents consumers from access poor quality goods and services. Prevents consumers from purchase of goods and services under unhygienic conditions and environment. Protects consumers from over priced goods and services. Protects consumer against underweight goods and inadequate services. Protects consumers against illegal goods and services. Protects consumers against harmful goods and services. Protects consumers against hoarding of goods to create an artificial shortage. Ways in which consumers and investors protect themselves. Educate members on their rights as consumers. Ensure regular supply of goods to avoid hoarding to create shortages. Ensure health and safety regulations are followed. Forming consumer associations to deal with all consumer related issues. Ways in which the government protects consumers and investors. Form laws that protect consumers such as public health act to ensure health and safety standards are met. Encourage formation of consumer organisations to deal with consumers interests. Encourage businesses to conduct their affairs in a way that does not exploit consumers interests. Ways in which Non-Governmental Organisations protect consumers and investors. Ensure standards are maintained by bot h producers and traders. Customer protection by informing customers on their rights. STRAND 2-COMMUNICATION. 2.1-Business Communication. Communication is the process of sharing information through a channel from the sender to the receiver. Business communication is the exchange of information between a business organization and its customers or between people within and outside a company. When business communication is done correctly, everyone can do their job, all of which increases productivity and even creativity. A communication channel is a medium or method that is used to deliver a message to an intended audience.
Business communication is the exchange of information between a business organization and its customers or between people within and outside a company. When business communication is done correctly, everyone can do their job, all of which increases productivity and even creativity. A communication channel is a medium or method that is used to deliver a message to an intended audience. Forms of communication channels used in Business. Oral verbal communication channels. Written communication channels. Audio-visual communication channels. Oral verbal communication channels. It involves speaking and listening by both the sender and the receiver. Examples of oral communication channels include: Face to face conversations. Group presentations. Telephone calls. Speeches. Lectures. Advantages and disadvantages of oral communication channels. Written communication channels. They involve use of text to pass information. The text can be handwritten, printed or shared using digital communication devices. Examples of written channels of communication in businesses are: Emails. Letters. Memos. Reports. Circulars. Short message services SMS Newsletters. Advantages and disadvantages of written communication channels. Audio-visual communication channels. It involves a combination of different content forms such as text, audio, images, video and animation. Examples are: social media platforms. Blogs. Televisions. Video-conferencing. Websites. Advantages and disadvantages of audio-visual communication channels. Factors considered when selecting channels of communication. Cost of the channel. Urgency of the message. Number of people receiving the message. Confidentiality of the message. Reliability of communication. Nature of the message: whether it is urgent, private or confidential. Need for immediate feedback. Supporting technology: both the sender and the receiver should have supporting tools to ensure the message is delivered successfully, for example mobile phones and internet connectivity. 2.2-Plain Scale Drawing. Plain scale drawing involves drawing a line that has been divided into a specific number of equal parts. The first part of the line is subdivided into equal smaller portions or units. It can be used to represent two units, a unit or a fraction of a unit. Plain scale is used in engineering drawings to measure up to two units such as metre and decimeters or feet and inches. Interpreting a plain scale used in drawing.
It can be used to represent two units, a unit or a fraction of a unit. Plain scale is used in engineering drawings to measure up to two units such as metre and decimeters or feet and inches. Interpreting a plain scale used in drawing. A representative fraction R.F is the ration od the size of a feature on a drawing to its true size on the object. It is expressed in fraction form as R FA plain scale can be constructed using the example below. Example 1.:On a drawing, 1 cm represents 1,5m on the ground. Draw a plain scale to measure up to 30m in 5m interval. Show the length of 27m on the scale. Steps to follow. Step 1Determine the scale to use. In our case 1cm represents 1.5m or 150cm. In this example, it is appropriate to use Centimetres. Step 2. Calculate the Representative fraction, R.FR.F measurement on the map divided by measurement on the ground. R.F 1cm 1.5m R.F 1 150. R.F 1:150. Step 3. Calculate the maximum length of the scale to read 30 metres length. Measurement on map R. F x measurement on the ground. Measurement on map 1 150 x3000 Measurement on map 20. Step 4Draw a straight line 20cm long and divide it into 6 equal parts. Divide again first part into 5 equal parts. Indicate the number on the points on the line as shown. To show length 27m, draw a line AB above the scale with and B at 25 m mark on the main scale. Extend the line for point A to be at point 2m on the smaller scale. Complete the drawing with all details. Example 2:On a scale 1:150, determine the length of line PQ as shown in the figure. Give your answer in metres. Steps to follow. Determine where line begins on the main scale. In this example, point Q is at the 15m mark. Determine the point on the smaller scale where the line reaches. From the diagram above, point P is between 2 and 3 on the smaller scale. Therefore, this point represents 2.5m from 0.
Determine the point on the smaller scale where the line reaches. From the diagram above, point P is between 2 and 3 on the smaller scale. Therefore, this point represents 2.5m from 0. Combine the two values such that 15 is the value on main scale, while 2.5 is the value from smaller scale. Therefore, length of the line PQ is 15 2.5 17.5 m. Example 3On a drawing of scale 1.5, the length of a line is a s shown in the diagram. The unit of the scale is decimeters. Determine the length of the line in centimetres. Determine where the line begins on the main scale. In this came point is at 9cm mark. Determine the point on the smaller scale where the line reaches. From this case it is 8 mark representing a length of 8cm. Combine the two values such that: 90cm 9dm is the value rom main scale and 8cm is the value from smaller scale, 90 cm 8cm 98cm. Hence the length of the line 98cm. 2.3 Visual Programming. Introduction. Visual programming is developing applications using graphical components and figures. These graphical components and figures mostly include images and video clips. Types of visual programming applications. Visual programming is also called block-based programming. It is a way of creating applications using graphical components and figures. This is mostly done through the use of code blocks and drag-and drop processes. The most common examples of visual programming applications are:Microsoft MakeCode. Scratch. Code.org. Sprite box. Microsoft Visual Studio. Roblox. Minecraft. Visual programming applications are used because they are easy and interesting to use. They also help in creating stories, animations and videos that entertain users. Launching a visual programming application. Type the word Scratch in the search box. The Scratch application will appear. Click on the Scratch application to launch it. Alternatively, click Start. Scroll down to category S then click on Scratch App. The application will launch. Visual Programming Features. Features of Scratch. Scratch is a visual programming language that can be used to create interactive stories, games and animations.
Visual Programming Features. Features of Scratch. Scratch is a visual programming language that can be used to create interactive stories, games and animations. Features of scratch include:The menu bar-it contains the fie menu used to save and load projects and the view menu which displays rulers, grid lines, status, zoom in and out options. The black palette-it contains a coloured set of code blocks that are used to program and give instructions to the sprite. The stage-it is the main working area where the sprite moves and performs according to the given code of instruction. Backdrops pane-it is the part used to add a back ground to the project. Functions of the features of Scratch. A sprite is a small graphic character that performs actions such as moving around the stage. The script area is also called the coding area; it is where codes scripts are created for a sprite to do a specific action. Codes are dragged and dropped here then snapped together to create a program. Code blocks are blocks shaped differently and are used to create codes in Scratch. The codes connect to each other vertically like a jigsaw. The sprite info shows information about the size of each sprite. The sprite pane displays all the sprites in a project. A selected sprite has a blue border around it. NBTo move the sprite, add a move block from the motion category. To add sound, click on sound category and choose a sound block. To move the sprite back, use a negative value on the move back block. The block can be repeatedly severally to generate the desired animation. Terminologies used in visual programming applications. The start option commands the sprite to perform moves, it is represented by a green flag. When you click stop the sprite ends its moves. Reserved words are also known as key words. These are words with a special meaning to the programming application. In scratch they are words that we cannot edit on the blocks. They include when, by and change. The rules that should be followed when writing a program using an application are called syntax. Input statement are blocks that are used to create animations. Output statements are outcomes of the processed instructions that are programmed using clocks. These are the actions viewed on the stage when the blocks are executing. Control structures are the blocks that allow selecting or repeating execution of certain blocks or instructions. A backdrop is the background for the stage. Backdrops can be changed from the gallery or photo in the computer.
Control structures are the blocks that allow selecting or repeating execution of certain blocks or instructions. A backdrop is the background for the stage. Backdrops can be changed from the gallery or photo in the computer. The sensing category helps one to enable input from the mouse, keyboard and other input devices. IF is used to choose between two output. For example, it can be used to perform mathematical calculations and state whether the answer given is correct or notSTRAND 3-MATERIALS FOR PRODUCTION. 3.1 Composite Materials. Identification of Composite materials. A composite material is formed by combining two or more materials of different characteristics. Some of the composite materials found in the locality include:Composition of composite materials. Different composite materials are made of different materials as described in the table below. Uses of Composite materials. Some of the uses of composite materials are explained as follows:In sports industry, composite materials are used to make various games and sports items. O Composite materials are used to make body parts of vehicles and bicycles. Composites materials are used to make customer goods and electronics such as mobile phones, television sets, radios and calculators. At home, composite materials are used to make hand tools and furniture. In construction industry, composites like concrete are used to build houses and to construct roads and bridges among other structures. In medical engineering, composite materials are used to make artificial body parts and implants. In transport industry, composite materials are used to make the body parts of vehicles, aeroplane, ships and boats among others. It is also used to make travelling bags and briefcases. NOTE:Artificial body parts are also called prosthetics. Prosthetics limbs are given to substitute missing body parts. These body parts may have been lost in an accident or through amputation. The prosthetic body parts help people with missing limbs to function properly and with ease despite the missing body partsCareers in use of Composite materials. Masonry-involves use of mortar, stones and concrete to construct structures. Pottery- involves use of mud to make pots, dishes, mugs, vases and other types of artworks. Interior design involves use of papier mache and manufactured boards to decorate interior of houses and motor vehicles. Sculpting -involves uses of clay, fiberglass, stone or concrete to make sculptures. Boat construction -involves use of fiberglass to construct boats that are light and resistant to corrosion.
Interior design involves use of papier mache and manufactured boards to decorate interior of houses and motor vehicles. Sculpting -involves uses of clay, fiberglass, stone or concrete to make sculptures. Boat construction -involves use of fiberglass to construct boats that are light and resistant to corrosion. Carpentry involves use of manufactured boards to make furniture, construct ceilings and other finishes in a building. Importance of composite materials used in the locality. Promote recreation that improves health. Providing employment. Use of manufactures boards such as blockboards, softboards or chipboards to reduce deforestation through recycling of waste. Improves the appearance in landscaping of compounds3.2 -Ceramic materials. A ceramic material is made by mixing clay, earthen elements like silica, kaolin, alumina and feldspar, and water. The material is thoroughly kneaded, shaped into desired forms and baked before being covered in decorative, waterproof, paint-like substances called glazes. Some ceramic materials like sea shells occur naturally. The common type of ceramic materials are:Earthenware- clay heated at temperatures of between 10000C and 11500C. An example is clay used to make pot. Stoneware clay heated at an average temperature of 12000C until it appears like glass. An example is material used to make a stoneware mug. Porcelain -clay mixed with glass and heated at high temperature of between 12000C and 14500C. Example is material used to make a porcelain cup. Most common ceramics materials found in the locality. Ceramic tiles. Glass. Backed clay bricks. Clay tiles. Physical properties of Ceramic materials. Ceramic materials break easily when crushed. Ceramic materials are poor conductors of electricity. Ceramic materials have a hard surface which is difficult to scratch. Ceramic materials are resistant to corrosion. Ceramic materials do not absorb water. Ceramic materials do not bend. Ceramic materials do not burn. Uses of ceramic materials. In electrical and electronic engineering, ceramics are used to make items like resistors, semiconductors and inductors etc. Ceramic materials are used to make a variety of pottery items like pots and utensils. In the manufacturing industry, ceramics are used to make a variety of household utensils.
In electrical and electronic engineering, ceramics are used to make items like resistors, semiconductors and inductors etc. Ceramic materials are used to make a variety of pottery items like pots and utensils. In the manufacturing industry, ceramics are used to make a variety of household utensils. Ceramics are used in plumbing works to make drainage installations and sanitary fittings such as toilets and wash basins,In construction, ceramics like bricks and tiles are used in building construction for walling, roofing and finishing materials. In beautification, ceramics are used to produce items like flower vase, lamp stand and souvenirs. STRAND 4 -TOOLS AND PRODUCTION. 4.1 Cutting tools. Identify and uses of various cutting tools. A cutting tool is a device that is used to chop, split, shape or remove excess materials from a workpiece. The common cutting tools are as follows:Knife-a small tool that has a sharp metal blade fastened to a handle. Its purpose is to cut cords, cutting and scrapping hides, reshaping timber, carving, cutting paper and kitchen work. Utility knife Skiving knifePanga-it is also called a machete. It is a tool made of a broad metallic blade with shapes. Used to chop wood as well as cut tree branches, shrubs and long weeds. Mainly used in fields of woodwork, construction and gardening. Axe-an axe is a woodwork tool. It is used to cut, split and shape wood. It is used to in the woodwork conversion industry as well as in the stone carving industry. Scissors-it is a tool that has to blades joined together at the middle so that the sharp edges can slide each other. They are of different types such as tailors scissors, barber s scissors, paper scissors and surgical scissors. They are used for cutting cloth, foil and paper, among othersScissors are used in fields like textile, medicine, beauty and leisure industry. Shears-a tool that has two blades joined together at the middle so that the sharp blades slide against each other,They are of different types. They are used to cut tough materials like leather, canvas and rubber. Shears are used by workers in leather industry, furniture industry and interior design. Carton shears. Leather shears. Snips-they are hand tools used to cut sheet metals and other tough materials. They come in different sizes. Mainly used in area such as construction, sheet metal work and leather industry.