2017 June Exam Memo

NS & TECH Grade: 4 Year: 2016 O < TOD. INTERSEN PHAS! MODERATED 26 -03- 2017 G. Botes: t

QUESTION 1 Choose the correct word from those given and cross your answer in the box below: 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 A B a: | D UZ C. Shelter D. Feeding [1] 1.2 When growing yeast water is used. A. Cold B. Boiling water A B | D ~~ C. Luke warm D. oe H.0.D. INTERSEN PHASE 1] MODERATED 13A structure give support: 26 0 2007 G. Botes: e A. — Shell B. Frame m4 Cc D Yv Cc. Wall D. Basket [1] 14 A shape does not change easily. A. — Liquids B. Solids A Bc l[ol|v C. 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 A B Le | D ~~ C. Flexible D. Transparent [1]

10 QUESTION 2 State whether the following statements are true or false: [5] Statements True / False 2.1. Freezing is the process when a liquid changes to a solid through cooling. True — 2.2. Plants need light, water, air and soil to grow. True ~ 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 \“ 2.5. Materials can be in three (3) states: e.g. Solid, Liquid and Gas. True .~ QUESTION 3 A. Name two objects that are flexible. (any two) -“ _“ Dish cloth, towel, newspaper, leather belt [2] B. Name one object that is waterproof. (any one) uw Glass jug, gum boots, _ plastic plate [1] C. Name two objects that are absorbent. (any two) —.. Dish cloth, towel, newspaper. [2] D. List two objects that are brittle. (any two) ae Glass jug, clay pot [2] 10

11 QUESTION 4 Study the following pictures and answer the questions that follow: The seed in container A received sun, but no water for 3 weeks. The seed in container B received water and sun light for 3 weeks. 4.1 Explain what happened with container A's seed and why it never germinated. Successful germination needs four (4) basic elements: Water, Sun, Soil and Air. Container A’s seed only received three (3) of the four. It never received any water (moisture) so the seed was never revived. uu [2] 4.2 Explain what happened with container B’s seed and why it germinated. Le The seed in container B received Water (moisture), Sun, Air and it was placed in Soil - it had all four (4) necessary requirements to germinate. -~ [2] 11

12 QUESTION 5 The table below shows the melting temperature of different substances. Substance Melting point in degrees Celsius (°C) Ice {0 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] Melting point in Degrees Celsins ("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. Ice will melt at the lowest temperature. [1] 5.3 Look at your graph and decide which substance melts at the highest temperature. Va Wax will melt at the highest temperature. [1] 5.4 What is the name of the process when solid wax turns into a liquid? The process is known as melting/ liquefying or/melt(s). — [1] 12

13 QUESTION 6 6.1 Complete the water cycle by filling in the missing words. 6.2 Ocean Ground water Evaporation U~ Condensation — Precipitation (rain/snow/hail) ~~ [3] Use the water cycle to explain in your own words how rain is formed. LU Water as a liquid heats up through the sun and evaporates. As the evaporated water (water vapor) rises, it cools down through a process called condensation. Cc. The condensed water vapor collects and form clouds through which precipitation (rain, snow or hail) then falls back to the earth. CS [4] 13

14 QUESTION 7 Study the following pictures and answer the questions that follow. 7A 7.2 7.3 7.4 Which shape will loose its shape when you press on the corner? The square / FigureA ~~ [1] Suggest two ways how we can strengthen the shape? (any two) Use one strip to brace diagonally opposite corners Connect the opposite corners with each other by using a strut a Through the use of triangulation Ue Reinforce [2] Which shape do you think is the strongest and why? a The triangle is the strongest, because: (any ONE reason of the three given) all the “members” or struts will push into each other, in this way supporting each other. Triangulation is used to strengthen a triangle Strongest shape. [2] Draw on Figure A how you will reinforce the square. [1] any answer. As long as it forms a triangle: Figure A: Square shape TOTAL: 40 14