2020 NOVEMBER EXAM PAPER GR4 NS TECH

Ob- //-?oDb 7t-**, ta- LlS Von Dyk Primory Districf 16 E,ttIS NO: 700160994 g Noturol Science ond Technology-Grode 4 Exominafion- Term 4 2O?O Specific Aims: 1r& 2 Exominotor: Ms. L Oppermon Aloderotor: Mrs, M duPreez Totol: _/ 4O = _7" Scole: Nome & Surnome: Grode 4._ Dote: Durotion: 60 min ASSESSMENT TOOL: Rotinq code % Description 7 80 - 100% Outstonding Achieved 6 70 - 79% Meritorious Achieved 5 60 - 69% Substontiol nchieved 4 50 - 59% Adequote Achieved 3 40 - 49% Moderote Achieved ? 30 - 39% Elementory Achieved 1 o-29% Not Achieved fnstructions: . Reod oll your questions very corefully before onsweringllll . Answer ALL the guestions. . Moke sure oll the detoils on the cover poge is completad. . Write neotly and presentoble. . Use o blue pen.

Question I tlOl Answer the followirg guestions: 1.1. Give the scientific nome/term for eoch of the following stotements: o) Any living thing thot ONLY eots PLANTS. (t) b) Any living thing thot ONLY eots other ANLT ALSli EAT. (1) c) Any living thing thot eats both PLANTS ond ANLI{ALS. (1) d) The ENERAy thot goes INTO o system/opplionce/object to moke it work. (t) e) The ENEROy thot comes OUT of o system/opplionce/object. (1) (s) 1.2. Drqw (pictures with writing) on ene?gy choin to show how energy is tronsferred from the SUN to o person drinking milk. NB!!! Remember your arrows. (5)

Question 2 t6I Determine the INPUT ond OUTPUT ENEROy of eoch opplionce in the toble below. INPUT ENERoY APPLTANCE OUTPUT ENERoY Wind-up rodio Sound ene?q\t Electricol ene?qy Fon Hoir dryer Bed lomp Question 3 t5I Soy whether the following sentences ore TRUE or FALSE. Question: Answer: 3.1. Sound is o form of enerqv 3.2. All sounds ore vibrotions 3.3. Volume is how high or low o sound is 3.4. Pitch is how loud or soft o sound is 3.5. Enerqy con be tronsf erced Question 4 t5l Lobel the picture by using the words in the word box Outer eor middle eor sound woves eordrum broin

1. 2. .3. 4. 5. Inner eor 6. Nerve 7. 8. Eor conol Reod the following cose study ond onswer the guestions thot follows: [14J Losing your hearing Xolile lrlku*ra rvorked as a miner ir: a gold mine for 24 years. Thc minc gawc the miners ear mtrfiFs ro prorecr rhcir cars. -l-he muffs wcre hor and uncomfortable ro *ear and the nrincrs could not hcu cach orher when they wore rhem. Xolile and rtre orher m.incrs did nor wear rhcm wcry oftcn- Thcy did nor know thar being in the noislr mine f:or eight hours wery day would damage rheir hearing. Larer, Xolile could nor trear people properly rvhen rhey ralked to him. He had his hearing rcsred by an audiologist- He had to rwait a long timc ro ger a trering aid from the hospiral- -Il- c hering aid madc thc sotrncls that cntered his cars louder so he could trear whar people werc saying again. Descri ption ag f.raf" I{oire source [>amages hearing 140 Shotgun blast immediarely 130 Plane taking off 120 Vuwuzel a Extr.enrely loud 1 1O Car hooter 100 Underground in a mine 90 . Big truck Damages hearing over aO Factory no,se time Loud 70 Classroom noise 60 People talking in the street Comfo rta ble 50 People talking at home rlo ' Fridge humming 5oft 30 Whisper 20 Watch ticking .to Normal breathing

1. Whof noise source will couse the most damage to your heoring? (1) 2. What noise sourca will couse the leost domoge to your hearing? (1) 3. Whot did the mine give the miners fo protect their eors? (1) 4. Why did they not wont to weor them? (3) 5. Is Xolile Nkutho heoring domoged? (1) 6. Why is noise pollution bod? (?) 7. Whot objects con couse noise pollution? (2) 8. How does o heoring oid help people who ore heoring-impoired? (1) 9. Musicions ploying in bonds ond orchestros ore indanger of heoring loss. So orepeople who listen to loud music. o. Do you think listening to loud music through eorphones con domoge your heoring? (1) b. Whot con you do to protecf your eors? (1) TOTAL: 40