Sit die helfte van die plante in die donker vir ten minste 24-48 uur en die ander in 'n goedverligte deel van die klas wat baie natuurlike sonlig kry. Na 24 uur, gooi 50 ml van die etielalkohol in die beker en sit dit in die kastrol met water. Verhit die kastrol oor die Bunsen brander of die stoof.
Week 1. The hidden cost of electricity. Where does electricity come from? (30 minutes) How does electricity generation impact on the environment? (30 minutes) How can the
Hulle laat weer suurstof in die atmosfeer vry. Die verandering van koolstof na koolstofdioksied (koolsuurgas) en terug na koolstof word die koolstofkringloop genoem. Wanneer jy 'n vuur maak, of gas of paraffien in jou huis verbrand, word koolstofdioksied in die lug vrygestel. Wanneer jy 'n elektriese stoof gebruik, word geen koolstofdioksied
Daar is vier hoofdele aan ’n mynskagtoring: Deel 1: Die wenas of hyser is in ’n wenas-huis. Hierdie deel van die stelsel word gebruik om die staalkabel op of af te wen. Die hyser is vas aan ’n motor en beheerstelsel. Die mynwerkerhysbak en die erts-emmer word in die myn in laat sak wanneer die staalkabel van die wenas afgewen word.
Figuur 10a: ’n Sirkel (tweedimensioneel) Figuur 10b: ’n Sfeer (driedimensioneel) Figuur 11: Die posisie van die lig wat op elke kubus skyn, bepaal watter dele ligter of donkerder sal wees. Die posisie van die lig op hierdie kubusse word deur die rooi pyle aangedui. Figuur 12: Verskillende skaduwees wat deur arsering geskep word.
Now let's see where people would use a circuit such as this one. Figure 8 shows an electric paper-cutting machine that is used to cut many sheets of paper simultaneously. An electric motor turns gears that press the blade
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vrydraaiende wiel. gedrewe wiel genoem. Figuur 12: Die agterwiel van ’n fiets word deur die rat-en-kettingmeganisme aangedryf. Die ketting gaan om ’n rat aan die agterwiel. D Daardie rat het ’n omtrek van 30 cm. As die ketting dus ’n vorentoe trekbeweging van 30 cm maak, sal die rat een maal roteer.
The impact of technology on society and the environment In this chapter, you will learn how plastic waste damages the environment. Then you will learn how this negative impact can be reduced. Figure 1: What is this
Non-metal oxides form acidic solutions. Metal oxides, metal hydroxides and metal carbonates form basic solutions. The general reaction of an acid with a metal oxide. General equation for the reaction of an acid with a metal oxide. Equations for the reaction between magnesium oxide and hydrochloric acid.
Seasons on other planets. Solar energy and life on Earth. Stored solar energy. Formation of coal. Formation of crude oil and natural gas. Fossil fuels store and transfer solar energy. Summary. Relationship of the Moon to the Earth. Relative positions.
a light bulb, a beeper that will work at 3 volts, and. six crocodile-clip wires, three insulated with red plastic and three with black plastic. Part 1: Make your cell. Fold the cooking foil lengthwise, so that you have a long piece
a light bulb, a beeper that will work at 3 volts, and. six crocodile-clip wires, three insulated with red plastic and three with black plastic. Part 1: Make your cell. Fold the cooking foil lengthwise, so that you have a long piece that is double in thickness. Put it on the table.
In section 8.1, you learnt how South Africa's government is improving the electricity supply so that more people can have access to electricity in their homes. Electricity has to be generated by ESKOM, and they not only have to supply individual households, but also tend to the whole country's electricity needs.
Sit die passer se ankerpunt op punt B, die hoekpunt van die hoek. Trek ’n boog oor elke been van die hoek . Stap 2. Sit die passer op die punt waar een boog ’n been sny en trek ’n boog binne die hoek. Sonder om die
Figure 14. Press your two hands together tightly as shown in this photograph. Then rub them against each other. Figure 15. If you put a piece of clay between your hands while you do this, the shape of the clay will change. The force applied by your rubbing hands is called shear force. Figure 16. Figure 17.
Hierdie proses is al sowat 2000 jaar oud. Hout van die inheemse acacia robusta boom is gebruik omdat dit besonder hard is en smeul wanneer dit aan die brand gesteek word. Hierdie hout is ook gebruik wanneer daar
18% is 18 hundredths, and 25% is 25 hundredths. 8% means 8 hundredths and 15% means 15 hundredths. A discount of 6% on an article can be calculated in two steps: Step 1: Calculate 1 hundredth of the marked price (divide by 100). Step 2: Calculate 6 hundredths of the marked price (multiply by 6).
mechanical disadvantage, but a distance advantage. You get a distance advantage when a machine makes something move further. Figure 4: A pair of kitchen tongs that give a distance advantage. inclined plane. The roof
Grade 8: Technology-important links: Supplementary textbook: http://www.mstworkbooks.co.za/technology/gr8/gr8-technology-10.htmlسؤال
Besluit hoe jy die stukke vir die twee tafelblaaie en die twee stutte sal sny. Jy kan hulle met die riffels langs in die wydte sny, soos wat in figuur 8 gewys word, of met die riffels langs in die lengte, soos wat in figuur 9 gewys word. Figuur 8: Riffels oor die breedte. Figuur 9: Riffels oor die lengte. Bou jou model van ’n tafel en toets
After many decades of studying atoms, scientists discovered that all atoms are made up of three different kinds of sub-atomic particles. They are called: The following picture of the atom shows how they all fit together. Neutrons, protons and electrons are sub-atomic particles that make up an atom.
Die gastoestand. Diffusie. Veranderinge van toestand. Toestandsveranderinge behels energie. Smelting en verdamping. Kondensasie en stolling. Digtheid, massa en volume. Massa s&سؤال
Technology Education Workbook Technology Education MST Workbook (PDF) http://www.mstworkbooks.co.za/technology/technology.html A PDF version is available
Next, fold the square in half the other way so that you have two folds diagonally across the square. Cut along one fold to the centre. Fold the one of the triangle sides underneath the other one to make a pyramid. Before gluing the two sides together, draw three lines to divide the sides into 4 layers.
Grade 8 Technology CAPS Workbooks Graad 8 Tegnologie CAPS Werkboek Gr. 8 Technology Book 1 Gr. 8 Technology Book 2 Gr. 8 Tegnologie Boek A Gr. 8 Tegnologie
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