Physical Sciences Grade 9 IEB June 2019 Memo

Downloaded from hlayiso.com TEACHERS WITHOUT BORDERS PROGRAMME BROUGHT TO YOU BY With grateful thanks to our associate partners, The National Department of Basic Education, The Independent Examinations Board, Siyavula Education, Smarticks, Noteshare, Lemonlicious, datacentrix, and most of all, to the schools and teachers from both the public and private education sectors who as founder contributors, have lent content to the Teachers without Borders programme, for the benefit of all South Africa's learners. In Bill Gates words, at the Mandela Day ‘Living Together’ address: “Maintaining the quality of this country’s higher education system while expanding access to more students will not be easy. But it’s critical to South Africa’s future” – working together, we can help achieve this." Contributing schools to date: Clifton School Milnerton High Rustenburg Girls’ High St Peter's Durban Girls' Northwood High St Anne's DC St Stithians Fairmont High Roedean St John's DSG Wynberg Boys' High Herzlia High Rondebosch Boys’ St Mary's DSG Kloof Wynberg Secondary

Downloaded from hlayiso.com inns OE ST JOHN'S D.S.G, PIETERMARITZBURG Small school. Big homl GRADE 9 PHYSICAL SCIENCES EXAM JUNE 2019 EXAMINER: Mrs M Greyling MARKS: 60 MODERATOR: Mrs | Evans and Mrs K Storm TIME: 60 Mins Name: Mend _ + CLASS: You have been provided with a Data Sheet along with this exam paper, please make sure that you have one enclosed in your exam paper before you begin and that it is handed in along with your exam paper when the exam is completed. QUESTION 1: Highlight or circle the correct answer to each of the following questions. 41.1. Potential energy is measured in..... A Ohms QD B. Watts ¢ ~ J} Volts . D Joules 1.2 The law of conservation of charge states: A Charge can be created but not destroyed, and transferred from one substance to . another. : Charge cannot be created or destroyed, only transferred from one substance to ~ another. Cc Charge can be created, destroyed and transferred from one substance to another. D Charge cannot be created, but destroyed and transferred from one substance to another. 1.3. Which of the following statements is NOT true regarding mass and weight? A Weight is a force caused by gravity and mass is the amount of matter in a substance. Va Mass is measured in Kilograms and weight is measured in Newtons. © The weight of an object on the moon will be the same-as the weight of the object on C Earth. DB The weight of an object on the moon will be less than the weight of the object on Earth. Page 1 of 9

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Downloaded fromh hla ayiso.com WAAC 1.4. Consider the following two circuits: Circuit A Circuit B Which circuit has the lowest current flowing through it? (A) — Circuit A B Circuit B Cc Both have the same current flowing through them D None of the above A 4.5 Akeitles element releases 4500J of heat in 3 seconds. What Is the kettles power output? A 4500 W & 4500 J v 1500 W D 13500 W C [5] QUESTION 2 Fill in the word needed to, complete the following sentences. 2.4 Stan Cc electricity involves electric:charges which are stationary or at rest. ve 2.2 Anobject that has the same number of electrons as protons is said to be neural a EC Makar Z uncnarg 23 A_conducrac is a material that allows electric charge to flow freely through it. : 2.4 Energy is defined as the ability todo__ WYO lad 2.5 The Sl unit for power is the__\NQUL- WA , re Page 2 of 9

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Downloaded from hlayiso.com QUESTION 3 A balloon becomes charged and the image below shows a lady's hair being attracted to the charged balloon. Study the image and answer the questions that follow. oo ldbine * Sehargod, 8 3.1 Describe how the ballogr could becom Thaugh frictin’elecoons were _Nonfewed onto _/OFF Yne balicon, resulbna_in_more/ lest electyons nthe _palioan thar’ arts Ancl is thevefare_ chavaect 1) (3) 3.2. What force, contact or non-contact, is being demonstrated in the picture? non-contact ~~ (1) 3.3 State the Law of Electrostatics. Opposite changes atwact each cthe-and | lice Charges fepel each other. = 1) [5] Page 3 of 9

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Downloaded from hlayiso.com QUESTION 4 Study the circuit below and answer the questions that follow. 4.1. Draw a labelled circuit diagram to represent the above circuit. ee, -| £00 incorrect a1 \1 order a a va wae Csatcy oo \ MU be “ \ Cyan) (Te. I Ra _ 6) 4.2 Onyour circuit diagram indicate the direction of CONVENTIONAL current. (1) Page 4 of 9

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Downloaded fr m.flay, qyis SACOM, the reading on the 4.3 Ifa resistor C is added in series to resi voltmeter over resistor B? Ik With decreaye 7 (1) 4.4 Give a reason for your answer to Question 4.3. Voltage. 1s divided Mer the Ves wrors 1 a SENS cuvcuit , wore. TeSiwears results in €ach feswor ~~ geting QC. lower VOIKIge - (2) 4.5. Give ONE factor that affects the resistance of a metal conductor. Leng ticcness - beimpevature > type of Mdtenal Cany one (1) [10] QUESTION 5 Consider the circuit shown below and answer the questions that follow. pL. lk! . } T&S) 5.1. Howwill the reading on Ai compare to the reading on Az? Will it be more than, equal to, or less than the reading on Az? Equal © — (1) 5.2 |f the resistance for R1 is 20, calculate the total resistance in the circuit. Or = R40, = 246 = CA Cont mybe 1) Included re it) 5.3. Calculaie the a, on As. Round your answer off to 1 decimal place. c=} Le A a , © bs camnec\ erward frow! $2. Page 5 of 9

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54 Calculate the AWaAlQaded from hlayiso.com f= Tx QL =_\4 xb La ies (3) nn | cmed Wy ea. 5.5 Calculate how much charge flows through the cell in 2 minutes. Q=txrT ue mea tivarel - . ni ae (3) = Be 220 CA iat] QUESTION 6 You have set up 1000 Christmas lights on your Christmas tree. When you plug them in you discover that 5 of the lights are not working. 6.1 Are the lights connected in series or parallel? Parallel -< [1] QUESTION 7 The diagrams below show the forces acting in four different situations, A - C. Study the diagrams and answer the questions that follow. Page 6 of 9

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74 7.2 7.3 7A 75 Downloaded from hlayiso.com Give the definition of a force. A Farce 1s exeedl uhen an agect is pushed or (1) pulled 7 Calculate the net force and state the direction (left or right) of the net force in each of the diagrams B and C. & c TN RIGHT (2) Give the specific name of the force shown in diagram A. Compression +7 (1) The diagram below shows all the forces acting on the go cart in diagram C. (a) (b) {c) Provide the names of the specific forces labelled b and c. () FAC) or __ aw resistance. i @_Grawiational farce [gravity / wexgie cL (2) Give TWO effects that a force can have on an obje LAE MOVING \etop Noving echame Wea; Change shepe; Sow Gaur, speed up 2) [8] Page 7 of 9

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QUESTION 8 Downloaded from hlayiso.com loanna the astronaut performs an experiment to determine the relationship between mass and veight on different planets in our solar system. She sets off in a space ship and measures her awn weight on the different planets. The following table shows her results. Planet Weight (N) Mercury 192.5 Jupiter 1424.5 Earth 550 Moon 88 3.1. Using the information in the table, calculate the acceleration due to gravity (g) on Jupiter Fg =mxq 3° Fg . Ww) A GM= FQ = \4elys te) = SSKG Vv => 25,4 MS ig cneartin | [4] QUESTION 9 \ block with a weight of 1350 N is hoisted (lifted) vertically upwards from the ground by a chain vinch and reaches a height of 2 m in 20 seconds. 1350N Page 8 of 9

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loaded from hlayiso.com 9.1 Calculate the power MN winel W=Fxd a = |250 KX 2-7 = 21007 - Wo P & LU = 2100 ~~ ZO - (aoW i 7 QUESTION 10 .. A man who has a mass of 80 kg is running away from a pit bull at a velocity of 5 m.s* and wants to jump over the garden wail that is 2 m high. Using kinetic energy and potential energy calculations decide whether the man would be able to jump over the 2 m high wall. Round your answer off to 2 decimal places Ee = Y2xnrx Vo - be = lz x mKYe = 2X 8OK 5 - 2 X80 X87 = |000% ~ joOOy 4, - EP | OR Ep= mxgxh xg = fOxKIOX2 6 = (co = (OoT Le SO*NO 4 (O00) 4 1600T = eom He waiblinoF M0. have. met NO We well MOF L~ pe alle. 1 JUMP Ove We wall. Page $ of 9

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