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Question (31)

QN0034532

Why are wetlands often called natural water purifiers?

(A) They filter pollutants from water.
(B) They produce metals.
(C) They stop rainfall.
(D) They create plastics.

Correct Answer: A

Explanation:

Wetlands remove pollutants from water.

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Question (32)

QN0034533

A wetland removes 420 kg of pollutants from incoming water annually. If 70 kg remain, what was the total pollutant load?

(A) 460 kg
(B) 470 kg
(C) 480 kg
(D) 490 kg

Correct Answer: D

Explanation:

420 + 70 = 490 kg.

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Question (33)

QN0034534

Which benefit of ecosystems provides raw materials such as wood and fibres?

(A) Provisioning service
(B) Predation
(C) Competition
(D) Decomposition

Correct Answer: A

Explanation:

Provisioning services provide useful resources.

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Question (34)

QN0034535

A forest produces 1,200 logs. If 25% are used for construction, how many logs are used?

(A) 250
(B) 275
(C) 300
(D) 325

Correct Answer: C

Explanation:

25% of 1200 = 300.

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Question (35)

QN0034536

Which ecosystem service helps regulate local climate conditions?

(A) Vegetation cover
(B) Plastic waste
(C) Soil erosion
(D) Mining

Correct Answer: A

Explanation:

Vegetation influences temperature and climate.

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Question (36)

QN0034537

Trees in a park lower the temperature by 4°C. If the surrounding area is 36°C, what is the park temperature?

(A) 30°C
(B) 31°C
(C) 32°C
(D) 33°C

Correct Answer: C

Explanation:

36 − 4 = 32°C.

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Question (37)

QN0034538

Which statement best explains the value of ecosystem benefits?

(A) They support life and human well-being.
(B) They reduce biodiversity.
(C) They prevent nutrient recycling.
(D) They eliminate habitats.

Correct Answer: A

Explanation:

Ecosystem benefits support living organisms and people.

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Question (38)

QN0034539

A forest supplies 540 kg of edible products. If 180 kg are fruits and the rest are nuts and seeds, how many kilograms are nuts and seeds?

(A) 320 kg
(B) 340 kg
(C) 360 kg
(D) 380 kg

Correct Answer: C

Explanation:

540 − 180 = 360 kg.

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Question (39)

QN0034540

Which ecosystem benefit is most directly related to maintaining fertile agricultural land?

(A) Nutrient cycling
(B) Air pollution
(C) Habitat destruction
(D) Soil compaction

Correct Answer: A

Explanation:

Nutrient cycling maintains soil fertility.

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Question (40)

QN0034541

A community receives 800 litres of clean water daily from a nearby ecosystem. How much clean water is received in 30 days?

(A) 22,000 L
(B) 23,000 L
(C) 24,000 L
(D) 25,000 L

Correct Answer: C

Explanation:

800 × 30 = 24,000 L.

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Question (31)

Why are wetlands often called natural water purifiers?

Explanation:

Link:

Question (32)

A wetland removes 420 kg of pollutants from incoming water annually. If 70 kg remain, what was the total pollutant load?

Explanation:

Link:

Question (33)

Which benefit of ecosystems provides raw materials such as wood and fibres?

Explanation:

Link:

Question (34)

A forest produces 1,200 logs. If 25% are used for construction, how many logs are used?

Explanation:

Link:

Question (35)

Which ecosystem service helps regulate local climate conditions?

Explanation:

Link:

Question (36)

Trees in a park lower the temperature by 4°C. If the surrounding area is 36°C, what is the park temperature?

Explanation:

Link:

Question (37)

Which statement best explains the value of ecosystem benefits?

Explanation:

Link:

Question (38)

A forest supplies 540 kg of edible products. If 180 kg are fruits and the rest are nuts and seeds, how many kilograms are nuts and seeds?

Explanation:

Link:

Question (39)

Which ecosystem benefit is most directly related to maintaining fertile agricultural land?

Explanation:

Link:

Question (40)

A community receives 800 litres of clean water daily from a nearby ecosystem. How much clean water is received in 30 days?

Explanation:

Link:

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