Flower Dome Station A The Baobabs Suggested Solutions. Question 1. Question 2a Diameter = 132 to 138 cm. Question 2b Radius = 66 to 69 cm

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1 Flower Dome Station A The Baobabs Question 1 Question a Diameter = 13 to 138 cm Question b Radius = 66 to 69 cm Question c Height = 18.5 cm Question d Volume = π = cm 3 (3 s.f.) to = π 69 Question e Exposed area 18.5 = cm 3 (3s.f.) ( π 66 ) + ( ) = 1400 cm (3s.f.) = π to ( ) ( ) cm = (3 s.f.) = π π Question f Cost 1

2 = $0.01 = $13.57 (nearest cent) to = $0.01 = $9.78 (nearest cent) Question g 1. The wooden object is cylindrical.. The volume and top surface area of the gap is negligible. Question 3 - First plant adaption All species have 'caudiciform' stems, which are swollen to store water. Question 3 - Second plant adaption Lose their leaves during dry season. Question 4a Question 4b They have a dry, stone-like appearance that allows them to blend in with their surroundings, camouflaging them from predators.

3 Flower Dome Station B Succulent Garden Question 1 Helps to ensure that sunlight reaches different parts of the stem to help it cool down. Protects the plants against animals. Provide shade. Reflect sunlight and reduce water loss. Protects underlying tissues from excessive sunlight. Ribs Produces spines instead of leaves Hairs, bristles and spines Thick skin / waxy surface Question a Perimeter = Arc length BC 1 = π 10 4 = 10π cm Question b Surface area = (Area of quadrant ABC Area of triangle ABC) 1 = π 10 4 = 57.1cm (3s.f.) Question 3a Volume 4 = π 3 3 = 030 cm (3s.f.) Question 3b Volume of water 90 = = cm = 1.8 litres (3 s.f.) 3

4 Flower Dome Station C Australian Garden Question 1 1. Fire-resistant bark. Lignotubers that develop into shoots after fire 3. Flowers more profusely once it has burnt 4. Regrowth from underground structures or carefully protected buds Question a Number of lines of symmetry = 5 Question b Number of lines of symmetry = 3 Question c Number of lines of symmetry = 6 Question 3a Diameter = 0.98 m Question 3b Diameter = 1.5 m Question 3c(i) Area of square mirror = = m Question 3c(ii) Cost of square mirror = $84 = $ (nearest cent) Question 3d(i) Area of border ( π 1.5 ) ( 0.98 ) = π = 3.95 m (3 s.f.) Question 3d(ii) Cost of mosaic tiles = $108 = $46.4 (nearest cent) 4

5 Question 3e Amount charged = $( ) = $ Question 4a Obtuse Angle Question 4b Reflex Angle 5

6 Flower Dome Station D South American Garden ~ 3.4 m Around times the height of a 1.7 m tall person. Question a 1. Count the number of steps needed to walk around the trunk.. Use a rope to wrap around the trunk. Question b Using method 1, 1 step = 31 cm Circumference = 31 cm 17 steps = 57 cm (approximately) Question 3a - First Sap can be fermented into a palm wine. Question 3a - Second Sap can be concentrated into a sweet syrup (palm honey). Question 3a - Third Edible fruits are harvested and eaten fresh. Other Answers for Question 3a Edible fruits are harvested and made into jam. Its leaves can be woven into baskets. Question 3b Number of wine bottles = ( ) = 400 bottles 6

7 Flower Dome Station E Olive Grove It is monosaturated, and the extra-virgin type has a high level of anti-oxidants. Used in the cosmetic and medicinal industries to manufacture skin care products. Question a(i) Vertical height = 15 cm 14 = 10 cm =.1 m Question aii) Measure the height of 1 step, then multiply by the number of steps travelled vertically. Question b(i) Horizontal distance = 30 cm 13 = 390 cm = 3.9 m Question b (ii) Measure the width of 1 step, then multiply by the number of steps travelled horizontally. Question c Fraction.1 = = 13 Question d It represents the gradient / steepness of the lower half of flight of stairs. Question 3a They can live to 000 years old. Question 3b = 041 7

8 Cloud Forest Station Triangle A Measure all the sides and ensure that there are equal sides. Question Use a 1 litre container and use a stop watch to find the time taken to fill up the container. Thereafter, divide the time taken to fill up the container by 1000 ml to find the time taken per ml. 8

9 Cloud Forest Station B Along the Foothills 73 cm 150 cm Question 1c 167 cm Question 1d = 5475 cm Question 1e = ( s.f.) Question 1f 167 = ( s.f.) Question 1g AB + BC = AC Question a 9 Question b 144 Question c 65 Question d

10 Cloud Forest Station C Before the Lift to Lost World = 613 million kg = 1980million kg Question All of the above Question 3 1) Shorter trees and shrubs ) Smaller and thicker leaves 3) Mossier surfaces, from the branches to twigs of every tree 10

11 Cloud Forest Station World Question 1 Triangle, Quadrilateral, Pentagon, Hexagon (Any two) Question 1 height sum of parallel sides 1 = 100 ( ) = 1650 cm 11

12 Cloud Forest Station Walk To allow rainwater to easily flow down the slope of the dome and collected for various uses. 1) To allow sunlight to pass through for photosynthesis by plants and trees. ) To reduce the amount of heat from the outside. Question 1: Discharge of clean water to the reservoir after cleaning. : Irrigation of seedlings and cuttings 3: Irrigation to Conservatories 1

13 Cloud Forest Station F After Cloud Walk Question 1 1) Rainwater is collected. ) Clean water is discharged to reservoir. 3) Irrigate the flowers, plants and trees in the Gardens. 4) To generate electricity. 5) Waste heat is used to regenerate the desiccant used for dehumidifying the domes. Question The features of a sustainable and carbon-neutral system at Gardens by the Bay: 1) Burning waste plant matter to generate electricity ) Use sunlight to generate electricity 3) Plants and trees absorb greenhouse gases 13

14 Cloud Forest Station View A cloud forest is a generally tropical or subtropical, evergreen, montane, moist forest characterised by a persistent, frequent or seasonal low-level cloud cover, usually at canopy level. (Source: The water from a cloud forest can create caves, feed the plants and start a waterfall. Question 1) Throughfall ) Stemflow 3) Crown drip 4) Fog drip Question 3 1% 14

15 Cloud Forest Station Mountain Calcium carbonate Carbon dioxide Question 1c Bubble the gas through limewater. If the gas is carbon dioxide, the limewater will turn cloudy. Question x 3.77 x 800 = m 15

16 Cloud Forest Station Check 5000 ( 00) = 500 Degrees Celsius Line Graph Question a(i) 360 mm Question a(ii) 360 mm / 5 weeks = 6.9 mm ( decimal places) Question b(i) 10 times Question b(ii) 10 x 60 = 600 times Question 3a Any two of the following: 1) Transport ) Residential 3) People Question 3b Any two of the following: 1) Animals ) Trees 3) Soil Respiration Question 4 Any two of the following: 1) Methane ) Nitrous oxide 3) Water vapour 4) Chlorofluorocarbon (CFC) Question 5a Melting icecaps Question 5b All of the above 16