1.1 Various options are provided as possible answers to the following questions - NSC Marine Sciences - Question 1 - 2022 - Paper 1
Question 1
1.1 Various options are provided as possible answers to the following questions. Choose the answer and write only the letter (A–D) next to the question numbers (1.1.... show full transcript
Worked Solution & Example Answer:1.1 Various options are provided as possible answers to the following questions - NSC Marine Sciences - Question 1 - 2022 - Paper 1
Step 1
1.1.1 The average tidal range on South African coastlines, from spring low to spring high, is …
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Answer
The average tidal range is approximately 2 meters based on coastal studies.
Step 2
1.1.2 Scientists use data to calculate the total amount or tonnage of fish that can be caught in the following season. This is called the …
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This calculation is referred to as the Maximum Sustainable Yield.
Step 3
1.1.3 The type of wave action illustrated by X in the diagram below:
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The type of wave action illustrated by X is referred to as waves in the surf zone.
Step 4
1.1.4 Which ONE of the following sequences correctly represents the adaptations used to overcome the anoxic conditions in estuarine sediments?
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The correct sequence is: Mud prawns utilize siphons, mussels build self-built tubes, mangroves develop pneumatophores, and blood worms create burrows.
Step 5
1.1.5 The area between the spring low tide and neap low tide marks that is only exposed for a few low tide cycles:
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This area is typically referred to as the Intermediate shore.
Step 6
1.1.6 Study the diagram below which illustrates the influences of …
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The diagram illustrates the influences of various geological and ecological factors affecting coastal dynamics.
Step 7
1.1.7 Which aquaculture holding system is used in inland freshwater dams?
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The aquaculture holding system most commonly used in inland freshwater dams is ponds.
Step 8
1.1.8 During an El Niño period, which ONE of the following events does NOT take place in the Pacific Basin?
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During an El Niño period, the SE trade winds actually weaken rather than strengthen.
Step 9
1.1.9 A dive cylinder on a boat was filled to 220 bars at 06:00 when the temperature was 11°C. It was then left on the boat until 15:00 where the pressure in the cylinder reached 240 bars. The temperature at 15:00 would then be …
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Based on the increase in pressure, the temperature at 15:00 would be approximately 36.8°C.
Step 10
1.1.10 The factor that is NOT an abiotic factor of a rocky shore:
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An example of a factor that is NOT abiotic could be the presence of various types of marine organisms.
Step 11
1.2.1 A middle shore eulittoral zone characterised by the presence of barnacles.
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This zone is referred to as the Balaninoid zone.
Step 12
1.2.2 Species that can be used to determine what is happening in the environment.
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These are known as Indicator species.
Step 13
1.2.3 The force that causes a surface from its equilibrium state that starts a wave action.
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This force is described as Generating force.
Step 14
1.2.4 A marine protected area that promotes the conserving of nature and allows human use of the ecosystem in a sustainable way.
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This area is termed a Biosphere reserve.
Step 15
1.2.5 The point on a surface wave where there is the highest upward displacement within the wave's cyclical movement.
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This point is known as the Crest.
Step 16
1.2.6 Waves that arrive at the seashore with less energy owing to the gradually shallowing seafloor below them.
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These waves are referred to as Spilling waves.
Step 17
1.2.7 A mechanism which converts mechanical energy into electrical energy.
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This mechanism is termed a Generator.
Step 18
1.2.8 A fishing method which involves towing trawl nets along the sea floor.
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This method is known as Demersal or bottom trawling.
Step 19
1.2.9 A small opening at the bottom of a cliff where the weaker material has eroded.
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This opening is referred to as a Wave-cut notch.
Step 20
1.2.10 Giving false or misleading information of the environmental benefits of a product or service.
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This practice is known as Greenwashing.
Step 21
1.3.1 Indicate whether each of the descriptions in COLUMN I applies to A ONLY, B ONLY, BOTH A AND B or NONE of the items in COLUMN II.
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This description applies to A only.
Step 22
1.3.2 Indicate whether each of the descriptions in COLUMN I applies to A ONLY, B ONLY, BOTH A AND B or NONE of the items in COLUMN II.
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This description applies to None.
Step 23
1.3.3 Indicate whether each of the descriptions in COLUMN I applies to A ONLY, B ONLY, BOTH A AND B or NONE of the items in COLUMN II.
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This description applies to Both A and B.
Step 24
1.3.4 Indicate whether each of the descriptions in COLUMN I applies to A ONLY, B ONLY, BOTH A AND B or NONE of the items in COLUMN II.
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This description applies to B only.
Step 25
1.3.5 Indicate whether each of the descriptions in COLUMN I applies to A ONLY, B ONLY, BOTH A AND B or NONE of the items in COLUMN II.
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