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Question (31)

QN008884

Excess fertiliser use in agriculture causes:

(A) Reduction in soil nutrients
(B) Nitrate runoff into water bodies
(C) Increase in oxygen level
(D) Decrease in algae growth

Correct Answer: B

Explanation:

Causes nitrate pollution

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Question (32)

QN008885

Disruption of oxygen cycle mainly affects:

(A) Only rocks
(B) Respiration and photosynthesis balance
(C) Earth’s rotation
(D) Ocean salinity only

Correct Answer: B

Explanation:

Affects respiration-photosynthesis balance

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Question (33)

QN008886

Increased greenhouse gases primarily trap:

(A) UV radiation
(B) Infrared radiation
(C) X-rays
(D) Radio waves

Correct Answer: B

Explanation:

Infrared radiation is trapped

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Question (34)

QN008887

Ocean currents help regulate Earth’s climate by:

(A) Increasing volcanic activity
(B) Transporting heat from equator to poles
(C) Blocking sunlight
(D) Reducing gravity

Correct Answer: B

Explanation:

Heat redistribution by currents

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Question (35)

QN008888

Human impact on Earth’s systems mainly results in:

(A) No change in environment
(B) Disturbance of natural cycles and climate imbalance
(C) Permanent cooling of Earth
(D) Stop of water cycle

Correct Answer: B

Explanation:

Human activities disturb natural cycles

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