HERZLIA MIDDLE SCHOOL

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1 NAME TEACHER S COMMENT TEACHER CLASS PARENT S COMMENT MARK PERCENTAGE PARENT SIGNATURE HERZLIA MIDDLE SCHOOL NATURAL SCIENCES GRADE 7 MID YEAR EXAMINATION 7 JUNE 2016 TIME: 90 Minutes MARKS: Grade 7 Science June Examination 2016 UHS

2 INSTRUCTIONS: 1. This paper consists of 22 pages. Check that you have them all. 2. Answer all the questions. Please write your answers in blue or black ink. 3. All diagrams and graphs should be done in pencil and labelled in ink. 4. Read each question carefully before answering it and pay attention to the mark allocation. 5. Write neatly and legibly. 2 Grade 7 Science June Examination 2016 UHS

3 MULTIPLE CHOICE ANSWER SHEET NAME: CLASS: Multiple Choice (use pencil only) Choose the answer, which you consider most appropriate and cross the corresponding letter on this Answer Sheet. E.g. If your answer to 1.3 is D, indicate your choice like this: 1.3 A B C D If more than one cross appears in any line, the answer will be marked wrong. 1.1 A B C D 1.2 A B C D 1.3 A B C D 1.4 A B C D 1.5 A B C D 1.6 A B C D 1.7 A B C D 1.8 A B C D 1.9 A B C D 1.10 A B C D 3 Grade 7 Science June Examination 2016 UHS

4 SECTION A: SHORT QUESTIONS [45] QUESTION 1: MULTIPLE CHOICE [20] Four options are provided as possible answers to the following question/ statement. Each question has only ONE correct answer. Cross the letter (A-D) next to the question number ( ) on the Answer Sheet. 1.1 What skill is a scientist using when he/she listens to the sounds that whales make? (2) A B C D making a hypothesis interpreting data making observations drawing conclusions 1.2 In an experiment, the factor that we measure is called the (2) A B C D controlled variable dependent variable experimental variable independent variable 1.3 In which step of the scientific method would a scientist make use of graphs? (2) A B C D asking questions communicating results making a hypothesis analysing data 1.4 Which of the following is not a property of materials? (2) A B C D waterproof hardness boiling point length 4 Grade 7 Science June Examination 2016 UHS

5 1.5 Compressive strength can be defined as: (2) A B C D the strength of an object that stops it being crushed or changing shape when squeezed. the ability to bend easily the ability to break easily the strength an object has that stops it from breaking when pulled apart. 1.6 The temperature at which a solid changes into a liquid is (2) A B C D melting point boiling point evaporation point freezing point Questions are based the following diagram. 1.7 The correct label for part A is the (2) A B C D stipe frond gas bladder holdfast 5 Grade 7 Science June Examination 2016 UHS

1.8 The function of part D is (2) A B C D to anchor the kelp to the ocean floor to capture sunlight for photosynthesis to hold the fronds upright towards the surface of the water to remove waste

6 1.8 The function of part D is (2) A B C D to anchor the kelp to the ocean floor to capture sunlight for photosynthesis to hold the fronds upright towards the surface of the water to remove waste products from the kelps body 1.9 Below are the results of a chromatography investigation of different ink pens. (2) Ink X is a mixture of colours of pens. A 1 and 2 B 2 and 4 C 1 and 3 D 3 and In a coffee machine, which method is used to separate the ground coffee from the coffee solution? (2) A B C D filtration evaporation distillation chromatography 6 Grade 7 Science June Examination 2016 UHS

7 QUESTION 2: TERMINOLOGY [10] Write the correct term(s) for each of the following statements. 2.1 Anything that occupies space or volume. 2.2 A material that does not easily allow heat to be lost to the environment. 2.3 The sorting of organisms into groups based on structural characteristics that they have in common. 2.4 The study of living things. 2.5 The ability of a material to allow heat to pass easily through it. 2.6 A factor in an experiment that remains constant throughout the investigation. 2.7 A method of separating a mixture of solids that have particles of different sizes. 2.8 An object used to separate a mixture of sand and iron filings. 2.9 An instrument used in science to view very small objects such as cells and can typically magnify the specimen being viewed A state of matter in which the particles are very closely packed together in fixed positions. 7 Grade 7 Science June Examination 2016 UHS

8 QUESTION 3: MATCHING COLUMNS [10] Match the letter in Column B to the correct statement in Column A. Write only the correct letter next to the question number in the ANSWER column. Letters can only be used ONCE. ANSWER COLUMN A COLUMN B 3.1 Mixture that consists of a solid dissolved in a liquid A copper 3.2 Ability for a material to bend B conductivity 3.3 A solid that does not dissolve in a liquid C glass 3.4 Method of separating pigments D filtration 3.5 Separation of mixtures involving evaporation and condensation E solute 3.6 Substance that is magnetic F chromatography 3.7 Substance that is a poor conductor of heat G solution 3.8 Material used in electrical appliances due to its electrical conductivity H solvent 3.9 Method to separate beans from sugar I flexibility 3.10 The liquid in which a solid dissolves J distillation K L M insoluble hand sorting iron 8 Grade 7 Science June Examination 2016 UHS

9 QUESTION 4: TRUE OR FALSE [5] State whether the following sentences are true or false. Fill your correct answer in the ANSWER column below. STATEMENT 4.1 Salt can be recovered from salt water by evaporation ANSWER (True or False) 4.2 When lighting the Bunsen burner the air hole should be closed 4.3 There are seven main Kingdoms of classification 4.4 In the binomial system, the species name is always written before the genus name 4.5 A pure substance is made up of only one type of particle SECTION B: LONG QUESTIONS [100] QUESTION 5 [10] 5.1 During an experiment, a teacher accidently drops some steel drawing pins into a bowl of sugar. Suggest and explain two methods that could be used to separate the drawing pins from the sugar. Method: (1) Explanation: (1) Method: (1) Explanation: (1) 9 Grade 7 Science June Examination 2016 UHS

5.2 Study the diagram below which shows filtration of sand and water. 5.2.1 Provide a label for the parts numbered 1 and 2. (2) 1-2 - 5.2.2 Provide a method for the above investigation.

10 5.2 Study the diagram below which shows filtration of sand and water Provide a label for the parts numbered 1 and 2. (2) Provide a method for the above investigation. (3) Write a suitable conclusion for this investigation. (1) 10 Grade 7 Science June Examination 2016 UHS

QUESTION 6 [18] Study the diagram below of an animal and a plant cell and answer the questions. 1 2 Cell A 3 Cell B 6.1. Identify which cell is a plant cell and which is an animal cell.

11 QUESTION 6 [18] Study the diagram below of an animal and a plant cell and answer the questions. 1 2 Cell A 3 Cell B 6.1. Identify which cell is a plant cell and which is an animal cell. (2) Cell A: Cell B : 6.2 Provide labels for parts numbered 1, 2 and 3 on the diagram above. (3) 6.3 What is the function of part numbered 2? (2) 6.4 Living things are made up of cells which show the seven characteristics of life, such as movement and growth. Write down the other 5 characteristics of life not mentioned. (5) 11 Grade 7 Science June Examination 2016 UHS

12 6.5 Draw a table in the space provided below in which you compare the plant and animal cells. (You must include at least 3 differences). (6) QUESTION 7 [20] Mr Joseph set up an experiment to investigate the thermal conductivity of different metals. He set up the investigation as seen below and placed a small lump of petroleum jelly (Vaseline) at the end of each metal rod and then timed how long it took for the petroleum jelly to melt. A B C D E A Steel B Aluminium C Brass D Copper E Zinc 7.1 Give the aim of this investigation. (1) 12 Grade 7 Science June Examination 2016 UHS

13 The table below shows the results of the investigation. Heading: Type of Metal Time (seconds) for petroleum jelly to melt Steel 147 Aluminium 46 Brass 84 Copper 24 Zinc Provide a suitable heading for the table above. (2) 7.3 Name the independent variable. (1) 7.4 Name the dependent variable. (1) 7.5 Identify at least three ways Mr Joseph would have ensured that this investigation was a fair test? (HINT: fixed variable) (3) 13 Grade 7 Science June Examination 2016 UHS

14 7.6 Draw a suitable graph for this investigation on the graph paper provided. (10) 7.7 Provide a suitable conclusion for this investigation. (2) 14 Grade 7 Science June Examination 2016 UHS

15 QUESTION 8 [9] There are over 40 different species of butterfly fish (Chaetodon sp.) found in tropical reefs throughout the world. Three different species of butterfly fish are shown below. The fish fin diagram and dichotomous key shown below can be used to determine the species of each of these fish. 15 Grade 7 Science June Examination 2016 UHS

16 8.1 Use the dichotomous key and fish fin diagram to identify fish A, B and C and then write the name of each fish in the column labelled Scientific name in the table below. (6) Fish Scientific name A B C 8.2 Provide at least 2 rules a scientist abides by when writing the scientific names of organisms. (2) Rule 1: Rule 2: 8.3 To what Kingdom would the butterfly fish belong? (1) 16 Grade 7 Science June Examination 2016 UHS

17 QUESTION 9 [9] Mr Joseph placed a mixture of salt and water in a distilling flask. Study the diagram below and answer the questions that follow. 9.1 What is the name of this method that is used to separate mixtures? (1) 9.2 Explain why the thermometer is not really necessary for this particular experiment. (2) 9.3 What vapour is present in the distilling flask? (1) 9.4 What is the purpose of the running water flowing through the Liebig condenser? (2) 9.5 Name the solute used in this experiment. (1) 17 Grade 7 Science June Examination 2016 UHS

18 9.6 Could this method be used to separate a mixture of two liquids (alcohol and water)? Explain your answer. (2) QUESTION 10 [14] Read the following text and answer the questions. It is summer and in Kayla s town the children are mad about frozen ginger beer Popsicles (a kind of ice cream). Kayla needs to drop the price to get children to come and buy her frozen ginger beer popsicles. In her backyard Kayla has already been collecting cool drink bottles. Kayla fills 24 bottles to the brim with ginger beer and screws the lid on each bottle tightly. She places them in a big basin and puts this in her freezer. She is shocked the next morning when she sees that the bottles [PAPER 1 TOTAL: 100] have burst and the lids are cracked. Kayla has a huge problem. She first tries to get her ginger beer. She is lucky because all the bottles are still in the basin. She leaves them in the sun and they melt. Kayla gets back all her ginger beer. Now Kayla does not know what volume of ginger beer she could pour into each bottle so that it will not burst when she freezes it. She takes five new bottles and using the lid of one of the bottles, scoops ginger beer from the basin and adds it to the bottles. Kayla counts the number of scoops he puts in each bottle. When she is finished, all the bottles have different volumes of ginger beer in them but none are completely filled. She numbers the bottles, tightens their lids and leaves them in his freezer. Kayla is happy with what she sees the next morning. None of the bottles have burst. Kayla finally knew the volume of ginger beer that was need to make a bottle of her homemade ginger beer Identify the scientific problem that Kayla encountered. (2) 10.2 Write down the most important thing Kayla knew about melting. (1) 18 Grade 7 Science June Examination 2016 UHS

19 10.3 Use the Particle Model of Matter to explain why the frozen ginger beer melted when Kayla placed it in the sun. (5) 10.4 In the two boxes below, identify and draw simple diagrams (use circles) to show the arrangement of the particles in the two phases of matter in which Kayla observed the ginger beer. Phase identified: (1) (2) Phase identified: (1) (2) 19 Grade 7 Science June Examination 2016 UHS

QUESTION 11 [20] Below are photographs of some of the organisms that

this year. Study the pictures and answer the questions.

1 Identify the organisms seen in the above photographs.

2 Which organism shown above is not an animal? Provide the letter.

20 QUESTION 11 [20] Below are photographs of some of the organisms that were seen in the rock pools at Bakoven on the Grade 7 Marine day outing this year. Study the pictures and answer the questions. Organism A Organism B Central disc arm Organism C Organism D 11.1 Identify the organisms seen in the above photographs. (4) Organism A: Organism B: Organism C: Organism D: 11.2 Which organism shown above is not an animal? Provide the letter. (1) 11.3 Name the instrument that a scientist would use to measure the length of organism A. (1) 20 Grade 7 Science June Examination 2016 UHS

21 11.4 In the space provided below, draw a scientific diagram of Organism B. (7) (Remember all the rules for a scientific diagram). 21 Grade 7 Science June Examination 2016 UHS

22 11.5 The graph below shows the amount of kelp harvested from the Western Cape beaches since What type of graph is represented above? (1) Describe the pattern that can be seen in the graph. (Hint: describe what happens to the kelp harvested from ). (4) How much kelp was harvested in 2011? (2) [TOTAL: 145] 22 Grade 7 Science June Examination 2016 UHS

Natural Science Cycle Test

NAME TEACHER S COMMENT SCIENCE TEACHER & CLASS MARK : PARENT S COMMENT PERCENTAGE : PARENT S SIGNATURE HERZLIA MIDDLE SCHOOL Natural Science Cycle Test GRADE 7 11 September 2014 TIME: 50 minutes Mark: