1.1.1 Watter een van die volgende is die swakste hitte geleier? (2)

2.4 Hoe word energie oorgedra in die volgende foto’s? (2)   Regsklik op die blou knoppie en maak die prentjie oop in n nuwe “tab”    

1.1.2 In ‘n elektriese ketel, hoekom word die element aan die onderkant geplaas? (2)

1.1.4 Watter van die volgende is energiebronne? (2)

1.3.5  Die hoogspringer het die meeste potensiële energie bo-aan haar sprong. (2)   Regsklik op die blou knoppie en maak die prentjie oop in n nuwe “tab”    

2.2 Daar is twee stelsels in die prentjie waar die ketel in die muur ingeprop word. Identifiseer hierdie twee stelsels. (2)   Regsklik op die blou knoppie en maak die prentjie oop in n nuwe “tab”    

1.1.3  Hoekom word ‘n lugversorger aan die onderkant van ‘n kamer geplaas? (2)

Read the following instructions carefully before answering the questions: 1)       The answers you provide must be your own, original work. No copying from any source is allowed. No marks will be awarded for work that is copied. 2)       Read all the questions carefully. 3)       Answer ALL the questions IN the quiz – do not leave any blank and do not write your answers on paper. 4)       Use the mark allocation as a guide to how much information is required in your answers. 5)       A file upload may be required. You will need paper, a pencil, a ruler and a scanner, scanning App or phone camera. 6)       Only hand draw diagrams, flow charts or tables on a separate piece of paper when asked to do so. 7)       All drawings should be done in pencil and labelled in blue ink. 8)       The diagrams in this question paper are not necessarily drawn to scale. 9)       You may use a calculator if necessary.

2.1.1 Wat is die energie per 100g in joule? (2)

  QUESTION 3 Read the following case study on Cancer and answer the questions that follow:   Differences between Cancer Cells and Normal Cells Cancer cells differ from normal cells in many ways. For instance, cancer cells: · Grow in the absence of signals telling them to grow. Normal cells only grow when they receive such signals.  · Ignore signals that normally tell cells to stop dividing or to die (a process known as programmed cell death, or apoptosis. · Invade into nearby areas and spread to other areas of the body. Normal cells stop growing when they encounter other cells, and most normal cells do not move around the body.  · Tell blood vessels to grow towards tumours and refresh these tumours with oxygen.   · Hide from the immune system.  · Rely on different kinds of nutrients than normal cells. Many times, cancer cells rely so heavily on these abnormal behaviours that they can’t survive without them. Researchers have taken advantage of this fact, developing therapies that target the abnormal features of cancer cells. https://www.cancer.gov/about-cancer/understandingwhat-is-cancer