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 correct answer is B. Aquaponics, as it is a system that integrates aquaculture with hydroponics.
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 answer is A. Maximum Allowable Catch. This term relates to the sustainable management of fish stocks.
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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Answer
The correct answer is A. Rising global temperatures. Increased temperatures influence CO2 levels significantly.
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 correct answer is A. BWk, which indicates a semi-arid climate.
Step 5
1.1.5 Destructive waves occur when …
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Answer
The correct answer is A. there is a stronger swash than backwash. This indicates a powerful wave action.
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 A. Red algae: Alginic acid - Yellow food colourant. Each type of algae has specific commercial uses.
Step 7
1.1.7 Which of the following combinations is CORRECT for this type of climate?
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Answer
The correct answer is C. (i), (ii), (iv) and (v), reflecting the characteristics of the Mediterranean climate.
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 correct answer is C. N2. Nitrogen is not a greenhouse gas.
Step 9
1.1.9 Which statement is INCORRECT and NOT associated with ocean acidification?
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Answer
The correct answer is D. Decreased production of carbonic acid. Ocean acidification leads to an increase in carbonic acid.
Step 10
1.1.10 Which of the following combinations is CORRECT for this type of holding system?
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Answer
The correct answer is B. (i), (ii), (iii) and (iv). This statement accurately reflects the functions of the multi-layered cage.
