Natural Sciences Grade 9 November GP 2018 QP (Eng)

Downloaded from hlayiso.com GAUTENG DEPARTMENT OF EDUCATION PROVINCIAL EXAMINATION JUNE 2018 GRADE 9 NATURAL SCIENCES NAME OF LEARNER: ___________________________________________ GRADE 9: ________ DATE: ___________ TIME: 2 hours MARKS: 100 20 pages + 1 data sheet Q1 Q2 Q3 Q4 Q5 Q6 Q7 Q8 Q9 Q10 Q11 Q12 TOTAL 8 6 6 11 9 8 8 4 6 9 11 14 100 P.T.O.

Downloaded from hlayiso.com NATURAL SCIENCES 2 GRADE 9 GAUTENG DEPARTMENT OF EDUCATION PROVINCIAL EXAMINATION NATURAL SCIENCES TIME: 2 hours MARKS: 100 INSTRUCTIONS AND INFORMATION 1 Write your name and class on the cover page of this EXAMINATION PAPER. 2 Answer all questions in the spaces provided on this paper. 3 This question paper consists of SECTION A, SECTION B and SECTION C based on the prescribed content framework in the CAPS document. 4 Allocation of marks: SECTION A: 20 SECTION B: 40 SECTION C: 40 5 This examination paper consists of twelve questions. 6 Follow the instructions of each question carefully. 7 All drawings should be done in pencil and labelled in blue or black ink. 8 Write neatly and legibly. P.T.O.

Downloaded from hlayiso.com NATURAL SCIENCES 3 GRADE 9 SECTION A QUESTION 1 MULTIPLE-CHOICE QUESTIONS Various options are provided as possible answers to the following questions. Choose the correct option by circling, or placing a cross over the correct letter (A – D). 1.1 Which of the following is the main function of the heart? A Physical manipulation of solid food B Regulation of digested food C Giving the cell its shape D To pump blood (1) 1.2 The symbol for Copper is ... . A Cu B Co C K D C (1) 1.3 The by-products of respiration are ... A oxygen, carbon dioxide and energy. B water and glucose. C carbon dioxide and oxygen. D carbon dioxide, water and energy. (1) 1.4 Arrange according to the pH scale from the least to the most acidic. A 6:4:2:1 B 1:4:2:6 C 6:2:1:4 D 1:2:4:6 (1) P.T.O.

Downloaded from hlayiso.com NATURAL SCIENCES 4 GRADE 9 1.5 The sequence in which food moves along the alimentary canal is ... . A Oesophagus, stomach, large intestine, small intestine. B Oesophagus, small intestine, large intestine, stomach. C Oesophagus, stomach, small intestine, large intestine. D Oesophagus, small intestine, stomach, large intestine. (1) 1.6 Which indicator is green in a natural solution? A Red litmus paper B Universal indicator C Blue litmus paper D Bromothymol blue (1) 1.7 Exhalation is the process when ... A muscles of diaphragm relax, the intercostal muscles relax and air is forced out of the lungs. B the muscles of the diaphragm contract, the intercostal muscles contract and air is forced out of the lungs. C the muscles of the diaphragm relax, the intercostal muscles relax and air flows downs the air passages into the lungs. D the muscles of the diaphragm contract and air flows down the air passages into the lungs. (1) 1.8 The gas that is produced when acid reacts with a metal is ... A Carbon dioxide. B Oxygen. C Hydrogen. D Water vapour. (1) [8] P.T.O.

Downloaded from hlayiso.com NATURAL SCIENCES 5 GRADE 9 QUESTION 2 TERMINOLOGY Give the correct scientific term for each of the following statements. Write only the term next to the question number (2.1 – 2.6) in the space provided. 2.1 The stage in the human life cycle when sexual organs mature for reproduction. __________________________________________________. (1) 2.2 A substance where two or more atoms are chemically bonded in a fixed ratio. ___________________________________________________. (1) 2.3 The removal of the waste products of a chemical reaction that takes place in cells. ____________________________________________________. (1) 2.4 The salts of hydrochloric acid. ____________________________________________________. (1) 2.5 The mixing of food with digestive enzymes and hydrochloric acid. ____________________________________________________. (1) 2.6 The statement or possible explanation for an investigation. ____________________________________________________. (1) [6] P.T.O.

Downloaded from hlayiso.com NATURAL SCIENCES 6 GRADE 9 QUESTION 3 MATCHING ITEMS Choose a concept in COLUMN B that matches a statement in COLUMN A. Write only the letter (A – H) next to the question number (3.1 – 3.6) in the space provided. COLUMN A COLUMN B 3.1 A group of cells with the same structure that performs A. Digestion the same functions. B. Antibiotics 3.2 A base that is soluble in water. C. Tissue 3.3 The structure or device which can be used to prevent unwanted pregnancy and sexually transmitted D. Products diseases like HIV/AIDS. E. Alkali 3.4 New substances that form during a reaction. F. Reactants 3.5 The breaking down of food into dissolved nutrients that can be absorbed into the blood stream. G. Absorption 3.6 Substances that can be used to kill harmful bacteria. H. Condom 3.1 3.2 3.3 3.4 3.5 3.6 [6] TOTAL SECTION A: [20] P.T.O.

Downloaded from hlayiso.com NATURAL SCIENCES 7 GRADE 9 SECTION B LIFE AND LIVING THINGS QUESTION 4 CELLS AS BASIC UNITS OF LIFE Study the diagram below and answer the questions that follow: 4.1 Identify the cell shown above. ____________________________________________________ (1) 4.2 Suggest ONE observable reason for your answer. ____________________________________________________ (1) 4.3 Provide labels for parts numbered 1 and 4. 1. ____________________________________________________ 4. ____________________________________________________ (2) P.T.O.

Downloaded from hlayiso.com NATURAL SCIENCES 8 GRADE 9 4.4 Name the part numbered 3 and give its function. _____________________________________________________ _____________________________________________________ (2) 4.5 What is the main function of part numbered 7? _____________________________________________________ (1) 4.6 Part numbered 6 is referred to as the “brain” of the cell. Suggest a possible reason to justify this statement. ______________________________________________________ ______________________________________________________ (2) 4.7 Tabulate TWO differences between a plant cell and an animal cell. PLANT CELL ANIMAL CELL 1. 1. 2. 2. (2) [11] P.T.O.

Downloaded from hlayiso.com NATURAL SCIENCES 9 GRADE 9 QUESTION 5 HUMAN REPRODUCTIVE SYSTEM Study the diagrams of the processes in the human reproduction cycle and answer the questions that follow. COPULATION MATURATION EJACULATION HUMAN LIFE CYCLE GROWTH FERTILISATION 5.1 Provide the number on the diagram in the cycle where an egg cell is released. ______________________________________________________ (1) 5.2 Identify the name of the process taking place in 5.1. ______________________________________________________ (1) P.T.O.

Downloaded from hlayiso.com NATURAL SCIENCES 10 GRADE 9 5.3 Name and explain the process taking place at number 4. ________________________________________________________ ________________________________________________________ (2) 5.4 Briefly explain the process of fertilisation. ________________________________________________________ ________________________________________________________ (2) 5.5 Name the hormone that plays a vital role in the male reproductive system. ________________________________________________________ (1) 5.6 In females the vagina is also referred to as the copulation canal as well as the birth canal. Briefly explain this statement. ________________________________________________________ ________________________________________________________ ________________________________________________________ (2) [9] P.T.O.

Downloaded from hlayiso.com NATURAL SCIENCES 11 GRADE 9 QUESTION 6 CIRCULATORY SYSTEM Study the diagram below that represents the human circulatory system and answer the questions. 6.1 Provide labels for the organs numbered 1 and 2. 1.______________________________________________________ 2.______________________________________________________ (2) 6.2 State the general names for the blood vessels represented by parts numbered 3, 4 and 5. 3._____________________ 4.__________________ 5._____________________ (3) P.T.O.

Downloaded from hlayiso.com NATURAL SCIENCES 12 GRADE 9 6.3 Identify the process that takes place at parts numbered 1 and 5. _____________________________________________________ (1) 6.4 Differentiate between the blood contained in parts 3 and 4. ____________________________________________________ ____________________________________________________ ____________________________________________________ (2) [8] P.T.O.

Downloaded from hlayiso.com NATURAL SCIENCES 13 GRADE 9 QUESTION 7 RESPIRATORY SYSTEM AND THE DIGESTIVE SYSTEM Read the following extract below and answer the questions that follow: Tuberculosis is one of South Africa’s worst killing diseases. Up to a million people in the world die from TB each year. It used to be called consumption because it consumes the body, causing it to waste away. TB is caused by a bacterial infection of body parts especially the lungs. It is spread from one person to another by inhaling the bacteria into the lungs when someone who has the disease coughs. The symptoms of TB are: loss of appetite, losing weight, having a fever and sweating, chest pains and coughing up blood. The disease can be discovered through an x-ray of the lungs. Fortunately TB can be cured if it is detected early enough. It is treated using drugs called antibiotics. 7.1 What micro-organism causes tuberculosis? ____________________________________________________ (1) 7.2 Explain briefly how tuberculosis is spread. ______________________________________________________ ______________________________________________________ ______________________________________________________ (2) 7.3 Suggest any measures to prevent the spread of tuberculosis. ________________________________________________________ ________________________________________________________ (1) 7.4 Differentiate between mechanical and chemical digestion. _________________________________________________________ ________________________________________________________ _________________________________________________________ (2) 7.5 Supply TWO reasons and explain why roughage (fibre) is important in the digestion of food. _________________________________________________________ _________________________________________________________ ________________________________________________________ (2) [8] P.T.O.

Downloaded from hlayiso.com NATURAL SCIENCES 14 GRADE 9 QUESTION 8 CIRULATORY AND RESPIRATORY HEALTH ISSUES Study the bar graph below that shows how many people in every 100 000, aged between 35 and 69, die from smoking and diseases related to smoking. 250 200 Death Rate 150 100 Neversmoked Never smoke Death Rate Activesmokers Active smoker Passive Passivesmokers smokers 50 0 Lung Lungcancer Mouth Mouth Other Other Heart Respiratory Heart RespiratoryOther Other cancer cancer cancer cancers cancers diseases diseases diseases diseases medical medical diseases diseases Health Health Issues Issues 8.1 Use the bar graph to find out how many active smokers die of heart diseases. ______________________________________________________ (1) 8.2 Look at the different groups of people (smokers, passive smokers and non- smokers) who die of respiratory diseases. From which group does the largest number of people die? ______________________________________________________ (1) 8.3 Would you prefer to be an active smoker, a passive smoker or a non-smoker? Give a possible reason to support your answer. ______________________________________________________ ______________________________________________________ (2) [4] TOTAL SECTION B: [40] P.T.O.

Downloaded from hlayiso.com NATURAL SCIENCES 15 GRADE 9 SECTION C MATTER AND MATERIALS QUESTION 9 PERIODIC TABLE OF ELEMENTS AND COMPOUNDS Use the attached periodic table of elements to answer the questions below: x 16 12 9.1 The symbol for the element represented by X in the above diagram is ... ____________________________________________________ (1) 9.2 The name of the element is ... ______________________________________________________ (1) 9.3 How many protons does this element have in its nucleus? ________________________________________________________ (1) 9.4 Is the element a metal or a non-metal? _________________________________________________________ (1) 9.5 The element forms an oxide when it reacts with oxygen. What is the name of the oxide that formed? ________________________________________________________ (1) 9.6 When the oxide is mixed with water, what will the pH of the solution be? ________________________________________________________ (1) [6] P.T.O.

Downloaded from hlayiso.com NATURAL SCIENCES 16 GRADE 9 QUESTION 10 REACTION OF METALS WITH OXYGEN Rust is a form of iron oxide formed when iron (Fe) reacts with oxygen (O). Complete the table below by providing the missing equations for the reaction between iron and oxygen: (3) Word Equation 10.1 Picture Equation (4) Balanced chemical 10.2 Equation KEY ELEMENTS: IRON OXYGEN 10.3 List any TWO ways in which the formation of rust can be prevented: 1. _______________________________________________ (1) 2. _______________________________________________ (1) [9] P.T.O.

Downloaded from hlayiso.com NATURAL SCIENCES 17 GRADE 9 QUESTION 11 REACTIONS OF ACIDS WITH CARBONATE Study the following experimental setup. Answer the questions that follow: delivery tube gas collecting in tube Beaker Sodium bicarbonate Hydrochloric acid 11.1 From the pH values given below, what pH value would you expect hydrochloric acid to have? ________________________ pH=1 pH=6 pH=7 pH=8 pH=13 (1) 11.2 Explain why drinking sodium bicarbonate helps to relieve indigestion. ______________________________________________________ ______________________________________________________ ______________________________________________________ (2) 11.3 Identify the name of the gas that is released during the above experiment. ________________________________________________________ (1) P.T.O.

Downloaded from hlayiso.com NATURAL SCIENCES 18 GRADE 9 11.4 Describe briefly how you would test for the gas released during the experiment. ______________________________________________________ ______________________________________________________ ______________________________________________________ ______________________________________________________ (2) 11.5 Write down a balanced chemical equation for the reaction taking place in the experimental setup above. ________________________________________________________ ________________________________________________________ ________________________________________________________ (5) [11] P.T.O.

Downloaded from hlayiso.com NATURAL SCIENCES 19 GRADE 9 QUESTION 12 INVESTIGATIVE EXPERIMENT Study the following extract and answer the questions that follow. Asanda’s grandfather likes to bake his own bread. Asanda noticed that after he makes the dough, he then leaves it in the sun to rise. Asanda wanted to know why it was necessary to leave the dough in the sun. She thought that it might have something to do with temperature. She decided to conduct an investigation. She made some dough with 100 g of flour; 2 g of sugar; 4 g of dried yeast and 25 ml of water at 38 ºC. She placed 10 ml of dough into each of three measuring cylinders. One cylinder was kept at 5 ºC; one at 20 ºC and the third cylinder at 35 ºC. Asanda then left the cylinders for 20 minutes and measured how much the dough had risen in each cylinder. She recorded her results as follows: TEMPERATURE (ºC) VOLUME DOUGH ROSE (cmᵌ) 5 15 20 25 35 35 12.1 Formulate an aim for Asanda’s experiment. __________________________________________________ __________________________________________________ (2) 12.2 Do you think this was a fair test? Give TWO reasons for your answer. ___________________________________________________ ___________________________________________________ ___________________________________________________ (3) 12.3 Identify the dependent and independent variables in the experiment. ___________________________________________________ ____________________________________________________ (2) P.T.O.

Downloaded from hlayiso.com NATURAL SCIENCES 20 GRADE 9 12.4 Draw a conclusion that Asanda can make based on the results from the table. _____________________________________________________ _____________________________________________________ (2) 12.5 Plot a line graph to show the results shown in the table. (5) [14] TOTAL SECTION C: [40] TOTAL: 100 END

Downloaded from hlayiso.com NATURAL SCIENCES GRADE 9 21 THE PERIODIC TABLE OF ELEMENTS / DIE PERIODIEKE TABEL VAN ELEMENTE