YEAR 8 SCIENCE EXAMINATION Semester 2 2016

YEAR 8 SCIENCE EXAMINATIONSemester 2 2016MULTIPLE CHOICE QUESTIONS – BOOK 1STUDENT NAME:TEACHER:DATE:Time allowed for this exam: (Book 1 and Book 2 Combined)Reading time before commencing work:Working time for this paper:10 minutes1hour 50 minutesMATERIAL REQUIRED / RECOMMENDED FOR THIS PAPER:To be provided by the supervisor:This question and answer bookletsTo be provided by the candidate:Pens, pencils, ruler, eraserIMPORTANT NOTE TO CANDIDATESNo other items may be taken into the examination room.It is your responsibility to ensure that you do not have any unauthorised notes or otheritems of a non-personal nature in the examination room. If you have any unauthorisedmaterial with you, hand it to the supervisor BEFORE reading any further. All iPads andmobile phones must be turned off and in your bag along with any other devices and notes.Bags are to be closed and placed under the desk.

INSTRUCTION TO CANDIDATES: Read through the paper to familiarise yourself with all of the questions. Use a blue or black ballpoint / ink pen for the written answers. Use pencil fordrawing the graphs. Write your answers in this booklet. Should you require more space than you have been given please use the spare sheet(at the back of this booklet) and ensure that you include your name and the question/ statement to which you are responding.AT THE END OF THE EXAMINATION:Any planning sheets or other pieces of paper MUST be handed in with this booklet.At the end of the examination make sure that your name is on your booklet and any otherpieces of paper used.Marks SectionMarksMultiple choice/10Short answer/35Multiple choice/10Short answer/35/10/100

Answer the following questions on the grid in your answer booklet(next page)Do not turn the page until you are asked to do so.

Circle the letter indicating the best 18ABCD19ABCD20ABCD

1.a.b.c.d.Living things that are made from only one cell are lular2a.b.c.d.The job of the mitochondria in cells is toRepair cell damageStore cell wasteControl the cell’s activitiesRelease energy3a.b.c.d.On the microscope, the objective lens is found on theEyepieceNosepieceMouthpieceChin piece4 If the eyepiece lens has a magnification of 10 times, and the objective lens has amagnification of 4 times, the total magnification isa. 2.5 timesb. 6 timesc. 14 timesd. 40 times5 Anton van Leeuwenhoek is credited with developing the first microscope. He workedas aa. Textile traderb. Scientistc. Doctord. Optician6a.b.c.d.Which of the following single-celled organisms is NOT a protist?BacteriaAmoebaSporozoaFlagellate

7a.b.c.d.The major organ of the urinary system isThe kidneyThe liverThe pancreasThe gall bladder8a.b.c.d.Which of the following should NOT be present in your urine?WaterSugarUreaSalt9a.b.c.d.The male part of the flower, or stamen, consists of thePetals and sepalsStigma and styleOvules and ovaryAnther and filament10a.b.c.d.The action of the male sex cell joining with the female sex cell is b.c.d.When a material cools down, its particlesVibrate slower and make it contractVibrate faster and make it expandVibrate slower and make it expandVibrate faster and make it contract12 My particles are in lined up in a regular repeating pattern and cannot changeposition. I am a:a. Plasmab. Gasc. Liquidd. Solid

13a.b.c.d.Sublimation is the name given to the change from:Solid to liquidLiquid to gasLiquid to solidSolid to gas14a.b.c.d.Which of the following is a physical change?Methane burning in airMagnesium fizzing in hydrochloric acidSalt dissolving in waterGlucose releasing energy in respiration15a.b.c.d.Water contains 2 hydrogen atoms bonded on to 1 oxygen atom. Water isAn elementA compoundA mixtureNone of the above16 If a perfume bottle is opened at the front of the classroom, eventually people at theback of the room can smell it. This is due toa. Dissolutionb. Deflectionc. Diffusiond. Distraction17 Kim measured the temperature change during a chemical reaction. The temperaturewent up. His experiment was:a. Exothermicb. Hyperthermicc. Endothermicd. Hypothermic18a.b.c.d.The correct way to write the chemical formula for water isH2OH2OH2OH2o

19a.b.c.d.When the bathroom mirror steams up it is an example ofMeltingBoilingCondensingFreezing20 If a material can be compressed, it means it cana. Change its shapeb. Be squeezed into a smaller spacec. Be poured through a tubed. Be heated to a very high temperatureEND OF MULTIPLE CHOICE QUESTION BOOKLET 1COMMENCE QUESTION AND ANSWER BOOKLET - 2

QUESTION AND ANSWER BOOKLET 2Student Name:1. What does each of the 7 letters stand for in the mnemonic “Mrs Gren”, and what dothese 7 things have in common?(4 marks)2. Correctly label the diagram below with the terms – vacuole, nucleus, cell wall, cellmembrane, cytoplasm and chloroplast.(6 marks)3. From the diagram in question 2, which cell, A or B, is a plant cell? Give one reason foryour answer(2 marks)

4. Using the structures named in question 2, complete the table below:StructureFunctionControls what enters and leaves the cellTraps light energy by photosynthesisGives supportStorage of water, food and wastesControls all cell activitiesJelly like substance containing all cell organelles(6 marks)Correctly name the cells pictured below from the following list: red blood cell, white bloodcell, palisade cell, guard cell, sperm cell, egg cell, root hair cell, ciliated cell.a.b.c.d.(4 marks)5. For 2 of the cells you have named in question 5, describe the job they do, whatspecialized feature(s) they have and how this helps them do their job.Cell 1:Cell 2:(6 marks)

Your body loses water through breathing, sweat and urine. Water in your breath is a wasteproduct from energy released in your cells. Sweat is produced to cool you down. Yoururinary system controls the amount of water in your body.If you play sport on a warm day will you produce more or less urine? Give 2 reasonsfor your answer.(5 marks)6. State 2 major differences between sexual and asexual reproduction(2 marks)7. Complete the table below about the 3 states of matter, by underlining the correcttermStateVolumeShapeSpeed of particlesSolidFixed/not fixedFixed/not fixedSlow/faster/fastestLiquidFixed/not fixedFixed/not fixedSlow/faster/fastestGasFixed/not fixedFixed/not fixedSlow/faster/fastest(9 marks)

8. The railway track in the photograph twisted and buckled on a hot summer dayThe tracks expanded in the heat.a. What does expanded mean?(1 mark)b. Explain, by referring to the speed of vibration of particles, why materials expandwhen they are heated.(3 marks)c. What should the workmen have done, when they were laying the track, toprevent the track from buckling? Explain your answer.(2 marks)

9. Alice and Joanne placed a piece of metal in a test tube of liquid and made 5observations about the reaction they witnessed, which they recorded in the Piece of metalCan be seenCan’t be seenAir above test tubeNo smellStrong smella. Did Alice and Joanne observe a physical reaction or a chemical reaction?(1 mark)b. Which two observations in the table support your answer to part a? Explain why.(4 marks)c. Chemical reactions can be classified into different types. Draw lines to connectthe reaction type with the correct description:Reaction TypeDescriptionCombustion2 or more reactants join together to form 1 productDecompositionburningCombination1 reactant splits into 2 or more productsPrecipitationsoluble reactants form an insoluble product(4 marks)d. In a combustion reaction, what element is always present as one of thereactants?(1 mark)

10. The diagrams below represent the arrangement of particles in four different gases.In the space below, correctly identify each one as either an element, a compound ora mixture.A.B.C.D.(4 marks)11. Write word equations for each of the following reactions:a. Hydrogen reacts with oxygen to produce water.(2 marks)b. Methane reacts with oxygen to produce carbon dioxide and water(2 marks)c. Hydrochloric acid reacts with sodium hydroxide to produce sodium chloride andwater.(2 marks)12. Dennis and Zoe were investigating the reaction between hydrochloric acid (HCl) andmagnesium (Mg). This reaction produces magnesium chloride (MgCl2) and hydrogen(H2).They wanted to see what effect changing the concentration of acid had on the rateof the reaction. They measured the rate of reaction by timing how long it took tocollect 10mls of hydrogen. Their results are in the table:

Acid Concentration (M)0.10.51.02.04.0Time to collect H2 (s)77151242a. What was the independent variable in this investigation?(1 mark)b. What was the dependent variable in this investigation?(1 mark)c. Suggest 2 things Dennis and Zoe would need to keep the same to ensure that thiswas a fair test(1 mark)d. On the grid provided, draw a graph of these results (over the page)

(5 marks)e. Which test produced an anomalous result?(1 mark)f.What should Dennis and Zoe have done to get more reliable results?(1 mark)END OF EXAMINATION

Spare pageName(Number question/s if using this page)Date

3 On the microscope, the objective lens is found on the a. Eyepiece b. Nosepiece c. Mouthpiece d. Chin piece 4 If the eyepiece lens has a magnification of 10 times, and the objective lens has a magnification of 4 times, the total magnification is a. 2.5 times b. 6 times c. 14 times d. 40 times