Technology Grade 7 November 2021 Memo

MEMORANDUM TECHNOLOGY END OF YEAR TEST Year:2021 Grade 7 TOTAL:60 MARKS SECTION A DESIGN PROCESS SKILLS & GRAPHIC COMMUNICATION [30 MARKS] QUESTION 1: Read the following scenario and answer the questions that follow 1.1 What is the problem in the above scenario that has made people in the community unhappy? The problem is that many people had to be evacuated from their homes as it was unsafe. /The problem is flooding in the Cape Agulhas region. √√ (2) 1.2 How are you going to solve the problem? (Write a design brief) I am going to design and make a model of an emergency shelter for the flood victims. √√ (2) 1.3 List six specifications needed for your solution. (6) 1.3.1 The shelter must be lightweight. √ 1.3.2 must be safe and sturdy√ 1.3.3 must be large enough to house a family of six for a month. √ 1.3.4 must be easy to transport/ must be portable√ 1.3.5 and must be easy to assemble√ and waterproofed. √ (Any 5) 1.4 List a constraint (limitation) for your solution. (1) 1.4.1 Not all learners will be able to bring their own tools and materials√ / Working alone can be a challenge for some √/ Some tools may not be available√ (Any 1) QUESTION 2: Sketch a 2D drawing of your proposed shelter design. Marks will be awarded for creativity and innovation. Use the rubric provided as a guide. Assessment criteria for freehand sketch Criteria Possible Marks 1 | BEDFORDVIEW PRIMARY SCHOOL TECHNOLOGY PAGE TOTAL:

mm mm Any possible 2D design ‘M- Materials E- Explain parts S-Show mm QUESTION 3: Vanishing Point Draw a single vanishing point perspective of the town hall drawing below where some of the victims were housed for a short while after being rescued. (6) VP X Assessment Criteria Criteria Possible Marks marks obtained Correct 2 √√ technique used and labelled VP All 3 √√√ construction lines are evident. Vertical and horizontal lines are correct Neatness 1 √ TOTAL 6 QUESTION 4: Investigate emergency situations and emergency food (6) 4.1 Are the flood victims from the scenario called refugees or are they internally displaced citizens? Motivate your answer. 2 2 | BEDFORDVIEW PRIMARY SCHOOL TECHNOLOGY PAGE TOTAL:

Internally displaced individuals. They are being temporarily sheltered in an alternate venue and are not crossing international borders to do so. / IDPs remain in their own countries. √√ 4.2 What would you consider as the flood victim’s two basic needs after they have been rescued? 2 Emergency shelter, nutritious food, warm protective clothing, clean water√√ (Any 2) 4.3 Suggest two types of emergency food that are both nutritious and convenient and would suit the needs of the flood victims during their stay in the Town hall. 2 Soups, dehydrated starches, cereals, bread / sandwiches, canned foods/ non-perishables e.g., Dried foods, cheap but sustaining. √√ (Any two possible answers) QUESTION 5: Investigate clothing worn by the NSRI (National Sea rescue institute) emergency workers (4) 5.1 The NSRI emergency workers need to be equipped to handle the cold turbulent waters while rescuing the flood victims. Provide two examples of emergency clothing that they would wear during the rescue operation. Foul weather gear√ , life jackets√ wetsuits√ (Any two possible answers) 2 5.2 How are wetsuits designed to help the rescue workers? Name the special fabric that is used in these wetsuits? 2 They have foamed neoprene that contain gas cells that act as insulators √, Wetsuits are custom made for better fit and for least resistance in the water √ SECTION B TECHNICAL KNOWLEDGE AND UNDERSTANDING [18 MARKS] QUESTION 6: Match column A with column B. Write only the letter representing the correct answer in column C. 3 | BEDFORDVIEW PRIMARY SCHOOL TECHNOLOGY PAGE TOTAL:

(6) Column A Column B Column C A. Consists of both a fixed 6.1Mechanical advantage pulley and a moveable pulley 6.1. C√ 6.2 Solenoid B.A drum like device that can wind up or coil cable or unwind 6.2 E√ to release tension C. The ability to do more work 6.3 Fulcrum 6.3. D√ with less effort D.A turning point or pivot point in 6.4 Moveable pulley a lever 6.4. F√ E. A cylindrical coil of wire 6.5. A√ 6.5 Compound pulley acting as a magnet when carrying electrical current 6.6 Winch F. Moves with the load and 6.6 B√ reduces the amount of input force to lift a load QUESTION 7 Mechanical systems Complete the table below (12) Mechanism Name the mechanism How can this mechanism indicated by the arrow, and affect mechanical type of input movement advantage? required in each case 7.1 7.1.2 The longer the lever/ effort Name: Lever√ arm the more mechanically advantaged the lever will Type of movement be√ Linear movement√ 7.2 7.2.2 Name: Crank√ The bigger the crank Type of movement handle the greater MA or Rotary movement√ The input force is greater than the output force√ 7.3 7.2.3 Name: Lever√ The closer the load is to the fulcrum, the greater the MA Type of movement or When the load on the left 4 | BEDFORDVIEW PRIMARY SCHOOL TECHNOLOGY PAGE TOTAL:

Reciprocating movement√ leans closer to the middle(fulcrum) it gets easier to move√ 7.4 7.4.1 7.4.2 Name: Pulley√ The more pulleys added will increase the Type of movement mechanical advantage Linear movement√ or Two pulleys will halve the load/ increase the distance of the rope√ QUESTION 8: Electrical Components (6) Name the electrical component and indicate if it Electrical symbol is an input or output device 8.1 Name Buzzer Output device 8.2 Name Electromagnet Output device 9.3 Name Switch (Open) Input device SECTION C: IMPACT OF TECHNOLOGY ON SOCIETY AND THE ENVIRONMENT 10.1. Which emergencies happen suddenly, without warning? (2) 5 | BEDFORDVIEW PRIMARY SCHOOL TECHNOLOGY PAGE TOTAL:

Fires, floods and conflicts like war can happen without warning√√ 10.2. How will these sudden emergencies affect each of the following? (a) the mix of people in the group? (2) In wars, men and older boys often must leave. The people who remain behind are mostly women, the aged, children and disabled people. √√ (b) the amount of food and water refugees have with them? (2) Sudden emergency situations often mean that there is no store of food, and access to clean water may be limited. When it is caused by fire or flood, most of the provisions will have been destroyed, leaving the people without supplies. √√ (c) the ability of refugees to build their own shelters. (2) When fires and floods have destroyed settlements, the materials to rebuild are often also destroyed or washed away, and tools are not available. In wartime, if people have to move, they may not be able to find suitable materials, have the tools, or even find suitable ground to build on. √√ 10. 3 Which emergencies happen slowly, over a longer period of time? (2) Droughts and loss of crops happen over a longer period of time√√ 10.4. Which emergencies are the most difficult to plan for? Explain why you say so. (2) Sudden emergencies such as floods and fires are unexpected and are more difficult to plan for. √ Communities can plan in some ways for these emergencies, but it is difficult to store enough food. √ TOTAL :60 6 | BEDFORDVIEW PRIMARY SCHOOL TECHNOLOGY PAGE TOTAL: