Abet Level 4 Summative Assessment s4

NATS4 -3- SBA-Tool: Assignment 2017

QUESTION 1
1.1 / Force of gravityü / (1)
1.2 / A: Waxing crescentü
B: First quarter halfü
C: Full moonü
D: Last quarter halfü
E: Waning crescentü / (5)
1.3 / Natural field of studyü / (1)
1.4 / Telescopeü / (1)
[8]
QUESTION 2
2.1 / · Copperü: Cuü
· Ironü: Feü / (4)
2.2 / Metals are malleableü or can be hammered or pressed into shapes without breaking. / (1)
2.3 / Mixtureü, variety of minerals and other impurities are presentü / (2)
2.4 / 2.4.1 / Combustionü / (1)
2.4.2 / Fe2O3ü or FeO or Fe3O4 / (1)
2.5 / · Open-cast miningü
· Deep-level miningü / (2)
2.6 / Air is pollutedü by the greenhouse gasesü such as sulphur dioxide, carbon dioxide that are released when coal is burnt. / (2)
[13]

NATS4 -3- SBA-Tool: Assignment 2017

QUESTION 3

3.1 / Gardenü / (1)
3.2 / 29% + 20% +13% = 62%üü / (2)
3.3 / · It can be used to water the garden.ü
· Laundry and bathing can be used to flush the toilet.ü / (2)
3.4 / 3.4.1 / (a) / Eutrophication is an overgrowth of algaeü caused by the presence of dissolved fertilisersü or untreated sewerage rich in nitrates and phosphates. / (2)
(b) / Acid-mine drainage is water pollutedü with acidic chemicals drainingü into natural water ways. / (2)
3.4.2 / The increased aquatic plants (algae) use up the oxygen in water,ü causing death of fish and other aquatic lifeü which results in the increased amount of carbon dioxide in water.ü / (3)
3.5 / · Grey waterü
· Rain waterü
· Treated sewerage water
· Storm water (Any other relevant answer) / (2)
[14]
QUESTION 4
4.1 / The roots hold the soil together,ü removal of trees exposes topsoilüto wind and rain,ü topsoil is easily washed away. / (3)
4.2 / Without trees the amount of carbon dioxide in the atmosphere will increase.ü
Increased amount of carbon dioxide will contribute to the increased greenhouse gases,ü which will contribute to increased temperaturesü thus causing global warming. / (3)
4.3 / Transpiration is the loss of waterü by plants in the form of water vapour.ü / (2)
4.4 / To make more land available for agriculture.ü / (1)
4.5 / Emissions from transport sector contribute to air pollution.ü / (1)
[10]

NATS4 -3- SBA-Tool: Assignment 2017

QUESTION 5

5.1 / Natural materials are from the environment,ü they exist in nature and synthetic materials are man-made materials.ü / (2)
5.2 / 5.2.1 / Naturalü / (1)
5.2.2 / Naturalü / (1)
5.2.3 / Syntheticü / (1)
[5]
TOTAL: / 50