1.1 Various options are provided as possible answers to the following questions - NSC Marine Sciences - Question 1 - 2023 - 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 - 2023 - Paper 1
Step 1
1.1.1 A form of agriculture that combines raising fish together with plant cultures that have no soil:
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Answer
The most suitable option is B. Aquaponics, which is a system that combines fish farming with growing plants in water.
Step 2
1.1.2 The tonnage that can be caught in the following season without compromising the future sustainable health of fish stock is referred to as ...
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Answer
The correct term is A. Maximum Allowable Catch, which refers to the largest yield that can be taken without affecting future catches.
Step 3
1.1.3 Which ONE of the following factors contributes the most to the carbon dioxide concentration in the atmosphere?
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The answer is A. Rising global temperatures, as increased temperatures often result from higher CO2 levels, creating a feedback loop.
Step 4
1.1.4 Which ONE of the following is the CORRECT Köppen-Geiger classification for the north-west coast of South Africa?
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Answer
The appropriate classification is A. BWk, representing a semi-arid climate commonly found in that region.
Step 5
1.1.5 Destructive waves occur when ...
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The correct choice is C. deposition is greater than erosion, which indicates that the waves are more effective at eroding land.
Step 6
1.1.6 Which of the following is CORRECT for the commercial use of algae?
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Answer
The correct answer is B. Red algae – Agar – Gelling agent for ice cream, as agar is derived from red algae.
Step 7
1.1.7 The statements below refer to the climate along the south-west coast of South Africa.
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Answer
The correct combination is B. (i), (ii) and (v), which encapsulates the characteristics of the Mediterranean climate in this region.
Step 8
1.1.8 Which gas is NOT one of the greenhouse gases found in the Earth’s atmosphere?
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Answer
The choice is C. Nitrogen, as nitrogen is a major component of the atmosphere, but it is not classified as a greenhouse gas.
Step 9
1.1.9 Which statement is INCORRECT and NOT associated with ocean acidification?
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The incorrect statement is C. Increased proportion of herring stocks, as ocean acidification generally adversely affects fish populations.
Step 10
1.1.10 The image below shows a multi-layered cage holding system used in aquaculture.
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Answer
The correct options for the holding system are B. (i) and (iv), indicating the design's immobility and its function in waste absorption.
