Geography Grade 11 IEB June 2019 Memo

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Downloaded from hlayiso.com GEOGRAPHY: PAPER I Page 1 of 4 G11 June Exam Memo 1.1 Local weather patterns 1.1.1. winter (1) 1.1.2 Rest of SA: summer rain (2) 1.1.3 a) T: 17-18oC; P: 1015 – 1018 hPa (2) b) 2am on 14 Nov (2) 1.1.4 (5) Temp 14/15*C Overcast, rain S wind, 15 knots 15 • 1.1.5 (1) 4pm, end of day TR occurs, general cooling down?? Passing of CF/MLC Overcast = less insolation [anything logical] [12] 1.2.1 HP Weak due to stability of descending air. LP Strong due to unstable convection currents (2) 1.2.2 a) (1) 1018hPa b) . (2) HP – higher than 1013 adjacent isobars increasing in value 1.2.3 (6) 0 0 1 1 1.2.4 a) Mid-Latitude/Sub tropical HP (1) b) Hadley and Ferrel Cells (2)

Downloaded from hlayiso.com GEOGRAPHY: PAPER I Page 2 of 4 1.2.5 a) (1) 20 knots b) (2) Blowing parallel to isobars c) Air blows under PGF from H-L. Cf acts at perpendicular to wind (greater wind speed = greater effect of CF) at high wind speed Cf is balanced by PGF & geostrophic balance is achieved (4) upper atmos – little friction 1.3.1 (4) Water content Velocities mudflows a) high c) 1cm – 10m per sec (fast) rock falls b) low d) 1m - 100m per sec (even faster) 1.3.2 (4) Loose material slips downslope in curved path. Base of material slipd more rapidly than surface (from underneath) Scar makes curve on hill Where soft rocks lie on resistant rocks. (Or medium water & speed??) 1.3.3 Expantion & contraction of soil particles by heating/cooling hydration/dehydration causes particles to move downslope under gravity. due to extremely small movements of soil, movement is slow. (4) 1.3.4 . (4) Discuss 2 - Gabions, cement screeding, netting 1.3.5 . Negative impact: rocks falling on cars, closing of pass, delay in travel time (2) 2.1.1. A the equatorial low (1) 2.1.2 C polar easterlies (1) 2.1.3 B Ferrel cell (1) 2.1.4 D high pressure (1) 2.1.5 C the polar front (1) 2.2.1 a) (1) Prolonged period of much drier weather than normal (e.g. season) b) (2) rain follows movement of ITCZ c) (6)

Downloaded from hlayiso.com GEOGRAPHY: PAPER I Page 3 of 4 2.3.1 a) (2) magma pushes into crust and crystallises below the surface b) (1) batholith/laccolith 2.3.2 a) (1) Magaliesberg b) (2) inclined = tilted/at an angle (1); strata = layers of (sed) rock (1) c) Dip scarp dip scarp dip PTA (4) 2.4.1 (1) canyon 2.4.2 (4) Water hard to access; good for tourism; difficult to build infrastructure 3.1 a (1) 3.2 27°51’43”S 25°38’27”E (2) 3.3 a) 33° NE (2) b) 43°30’ (1) c) 43°36’ (2) 3.4 2527BD (2)

Downloaded from hlayiso.com GEOGRAPHY: PAPER I Page 4 of 4 3.5 (16.5 * 50 000)/100 000= 8.15km (2) 3.6 8.15km/4 min= 2hrs 4min (3) 3.7 1180m (1) 3.8 NNW (1) Powered by TCPDF (www.tcpdf.org)