2019 June Exam Memo

Laerskool Van Dyk Primary — District D16 Natural Science and Technology Grade 4— Term 2 2019 Assessment Task 2 — Examination Subject: NS & Technology Specific Aims: 1 & 2 Examinator: L. Opperman Moderator: M. du Preez Duration: 60 min Date: 23 May 2019 ) : ~ Name and Surname: Meno Grade: 4. Date: Total: /40= % Scale: ASSESSMENT TOOL: Rating code % Description 7 80 - 100% Outstanding Achieved 6 70 - 79% Meritorious Achieved 5 60 - 69% Substantial Achieved 4 50 - 59% Adequate Achieved 3 40 - 49% Moderate Achieved 2 30 - 39% Elementary Achieved 1 0-29% Not Achieved Instructions: e Answer ALL the questions. e Write neatly and presentable. e Use a blue or a black pen.

QUESTION 1: Multiple choice [10] Choose the correct word from those given and circle your answer: 1.1 Although living things look different, they all carry out seven similar life processes. One of the following is not part of the seven life process A. Movement B. Sensing ©) Shelter wv D. Feeding [1] 1.2 When growing yeast water is used. A. Cold ~ Boiling water B © Luke warm ~~ D. Frozen [1] 1.3A structure gives support: A. Shell B. Frame =~ c. Wall D. Basket (1] 14A shape does not change easily. A. Liquids (B) Solids ~~ Cc. Gas D. None of the above [1] 1.5 Which one of the following is not a property of glass? A. Waterproof B. Heat resistant © Flexible x D. Transparent [1]

1.6 Which of the following do not show a life process? A. Cow (8) Dead branch ~~ Cc. Egg D. Dog [1] 1.7 Seeds seem not living, but they became alive when the correct conditions are added to them. A. Water (moisture) B. Warmth G Air (D.) Allof the above ~ (1) 1.8 Roots of plants... (a) hold the plant in the soil, absorbs water, mineral and salts. —~ B keeps the plant upright, hold the plant in soil. (ee uses sunlight to make food for the plant. D helps to keep the leaves green and healthy. [1] 1.9 The scientific name where animals make their homes is called ... A. Ecosystem (B) Habitat = Cc. Their homes D. Palace [1] 1.10 Predators are animals that ... A. eat grass and meat B. catches only fish and eats them c eat meat, seeds and plants (0) catches and eats other animals a [1]

QUESTION 2: (True or False) [7] State whether the following statements are true or false: Statements True / False 2.1. Freezing is the process when a liquid changes to a solid through : cooling. True uv 2.2. Plants need light, water, air and soil to grow. Truk ve 2.3. Gases have no definite shape and take up all space available. True - 2.4. When solid change to liquid the process is called condensing. False, vd 2.5. Materials can be in three (3) states: e.g. Solid, Liquid and Gas. que, 2.6. A glass jug is a material that is flexible. False, ee 2.7. A newspaper is a material that is waterproof. Fals ) a QUESTION 3 [7] 3.1. Complete the water cycle by filling in the missing words. [3] Ocean Ground water a Evoporation B: Condens atlen c__ Precipitation IA]

3.2. Use the water cycle to explain in your own words how rain is formed. *(Use the picture and words above to help you.) Woter aS a _liguiid heats up thragh the sun are , U evaporates ‘A, We ehaporeitec! werbe®r_vises it Ceels lew through —_cenelensatien “The condensed weber _Yapeur_Collecks — ' One for cloads throug PeCIpIkaticon (yan, Snow (4) cr nevl) tren falls werk Ge te Goth --Stavtng oil mer agen . QUESTION 4 J Study the following pictures and answer the questions that follow: The seed in container A received air, warmth and sun, but no water. The seed in container B received air, warmth, water and sun light 4.1. Did the seed in container A grow? Explain why. No i because it dicl net get weber 67 [2] 4.2 Did the seed in container B grow? Explain why. eee - : peause he qer wermth Luck ber a air and sun_ight. +7 ar [2]

QUESTION 5 [6] The table below shows the melting temperature of different substances. Substance Melting point in degrees Celsius (°C) Ice 10 Chocolate 30 Wax 60 5.1 Use the information listed in the table and draw a bar graph showing the different melting temperatures for these substances. [3] i | | Melting point in Degrees Cebins @C) 0 10 20 3040 50 60 ~~ | | Ice Chocolate Wax 5.2 Look at your graph and decide which substance melts at the lowest temperature. = lige 2 [1] 5.3. Look at your graph and decide which substance melts at the highest temperature. en [1] 5.4 What is the name of the process when solid wax turns into a liquid? Melting (1] =

QUESTION 7 [6] Study the following pictures and answer the questions that follow. Figure A: Square shape Figure B: Triangle shape 7.1 Which shape will lose its shape when you press on the corner? Fiewe AX / Square [1] w) U 7.2 Suggest two ways how we can strengthen the shape? © any bwe) Reinforce Struts Var“ Trionqulakbien [2] 7.3. Which shape do you think is the strongest and why? : Stron gf Se snare Fiquure Se peouse “ib is in the shoge of Ug : S a briergie | brteinqulaticn v Suppert [2] wr WOW l Strena ne 7.4 Draw on Figure A below how you will reinforce the square. S (71>! liza bg ' Stifter - canu wo} oS ag) as a es le is formed ) ee -Figure A: Square shape TOTAL = 40