Grade 5 Natural Sciences Mid Year Examination 2021 Marking Guidelines

Blouberg Ridge Primary School Natural Sciences and Technology a. | Marker and date: J. Bauer Name: Marking Guideline svete Grade 5 Date: 30 June 2021 Time allocation: Examiner: J. Baver Moderator: ..oZ7 AGE sae Task 4: Test Total: 40 Question 1: LO [5] Circle the correct answer. 1.1) A metal that is attracted to a magnet has... a) Magic properties b) Magnetic properties c) Magnetic energy d) Magnetic forces 1.2) Why is gold often used for making jewellery? a) It is malleable b) It is the right colour Cc) It is easy to find Q) It is a common metal 1.3) What is an alloy? a) A substance that is likely to break or crack. b) Metal coated by another metal. c) A pure substance which cannot be broken down further d) Two or more metals mixed together, or a metal mixed with a non-metal. 1.4) Metals are ductile. What does ductile mean? a) It can be drawn into wire b) It is able to bend without breaking ¢c) It is a bad conductor of heat d} One metal covered with another metal 1.5} Why is copper used for electric wires? a) It is an alloy. b) It is malleable. ¢c) It is a good conductor of electricity. d) lt cannot be used for anything else. lof 4

Question 2: LO [5] Match the key word in column A with the correct definition in column B. Write the correct letter in the blocks below the tabie. 2.1) Paint a) a dry, coloured powder that is mixed with oil or water to make paint. 2.2) Fabric b) a liquid used to give colour or texture or protect surfaces and objects. 2.3) Plaster of Paris c) material made from yarn or fibres by weaving or knitting. 2.4) Pigment d) a material that is not easily damaged by fire. 2.5) Fire-resistant e) a white powder that quickly becomes a hard solid when mixed with water. | f) a material that is not easily damaged by Sr: | heat. 2.1) b 2.2) ¢ 2.3) ¢e 24)a 2.5) d Question 3: [5] 3.1} Mention one metal which rusts. HO (1) tron or steel 3.2} How does rusting occur to the metal mentioned in question 3.1 ? HO (1) When the metal is exposed to air or water. 3.3) You see a man painting a metal fence to prevent it from rusting. Identify three methods of preventing metals from rusting. MO (3) e¢ Coat them in plastic e Coat them with another metal that does not rust e Coat with oil or grease 2 of 4

Question 4: MO [3] Use your knowledge of different metals and write down which metal is used to make the items below. A crane for lifting boxes onto a ship: Steel/ Iron A helicopter: Aluminium A necklace: Silver/ gold Question 5: LO [5] Think about the process of making jelly. To make jelly, you will need a packet of jelly powder, hot and cold water. Using the word box, fill in the missing words to write about this process. different raw cooling the same drying and firing mixing and cooling liquid gas cooking Making jelly uses the 5.1) mixing and cooling process. The new mixture will have 5.2) different properties from the 5.3) raw materials. The jelly powder was solid, but it became a 5.4) liquid when water was added. After 5.5) cooling it changed into a solid again. Question 6: MO [5] Determine whether the following statements are true or false. If false, rewrite the statement so that it becomes true. 61) Xhosa rondavels have roofs that are made of mud and clay. False, Xhosa rondavels have thatched roofs made of grass. 6.2) Weaving is the process of rolling material into a spiral shape. False, weaving is the process of making something by crossing strips or threads under and over each other. 6.3) Stitching is the process of using thread to sew or join two materials together. True 6.4) The Nama Matjiehuis is made of grass mats. True 6.5) Plant fibres are used to weave, stitch and plait. An example of a plant fibre is animal hair. False, and example of plant fibre is grass or reeds. 3 of 4

Question 7: [5] 7.1) What does it mean if a metal is magnetic? HO (1) lt means that the metal is attracted to a magnet. 7.2) Mention three metals that are magnetic. MO (3) Iron, steel, nickel, cobalt 7.3) Look at the pictures below and determine which of the objects will be attracted to a magnet. Circle your answer. Sed Va Le A- Plastic B- Iron C- Aluminium pencil D- Fabric ruler nail sharpener sports jersey B- Iron nail LO (1) Question 8: [7] 8.1) Look at the table below and provide one use for the processed materials listed. LO (4) Plaster of Paris a) ceilings, dentist moulds, casts, Polyfilla (any one appropriate answer) Concrete b) buildings, pillars, reinforcement, power stations, silos, water pipes (any one appropriate answer) Fabrics c} table cloths, jerseys, stockings, socks (any one appropriate answer) Ceramics d)} pottery, crockery, tiles, toilets (any one appropriate answer) 8.2) Give one reason why people use glass to make windows. HO (1) Glass is used to make windows so that the light and heat from the Sun can get into the buildings. 8.3) Identify one natural fibre. HO (1) Wool, silk, cotton (any one answer) 8.4) Plastics are used for containers and lunchboxes. Mention one property of plastics that make them good products. HO (1} Plastics are light, strong, durable and waterproof (any one property). ST :Gownend: 50: Anat ley SE: ME gllreH