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Question (1)

QN005753

Which natural material forms the uppermost layer of the Earth's land surface where plants grow?

(A) Rock
(B) Soil
(C) Mineral
(D) Sandstone

Correct Answer: B

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Question (2)

QN005754

Which of the following is the main source of soil formation?

(A) Clouds
(B) Rocks
(C) Rivers
(D) Animals

Correct Answer: B

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Question (3)

QN005755

A rock sample has a mass of 500 g. If weathering breaks it into five equal pieces, what is the mass of each piece?

(A) 50 g
(B) 75 g
(C) 100 g
(D) 125 g

Correct Answer: C

Explanation:

500 ÷ 5 = 100 g.

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Question (4)

QN005756

Which process gradually breaks large rocks into smaller particles to form soil?

(A) Germination
(B) Weathering
(C) Respiration
(D) Pollination

Correct Answer: B

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Question (5)

QN005757

Which component of soil is formed from decayed plants and animals?

(A) Gravel
(B) Sand
(C) Humus
(D) Clay

Correct Answer: C

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Question (6)

QN005758

A soil sample contains 40% sand. How much sand is present in 250 g of soil?

(A) 50 g
(B) 75 g
(C) 100 g
(D) 125 g

Correct Answer: C

Explanation:

40% of 250 = 100 g.

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Question (7)

QN005759

Which type of soil particle is the largest in size?

(A) Clay
(B) Silt
(C) Sand
(D) Humus

Correct Answer: C

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Question (8)

QN005760

Why is humus important for soil?

(A) It increases fertility
(B) It removes water completely
(C) It changes soil into rock
(D) It reduces air spaces

Correct Answer: A

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Question (9)

QN005761

A farmer has 600 kg of soil. If 15% of it is humus-rich material, how much humus-rich material is present?

(A) 60 kg
(B) 75 kg
(C) 90 kg
(D) 120 kg

Correct Answer: C

Explanation:

15% of 600 = 90 kg.

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Question (10)

QN005762

What is a mineral?

(A) A living organism in soil
(B) A naturally occurring substance found in rocks
(C) A type of weather condition
(D) A form of water

Correct Answer: B

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Question (1)

Which natural material forms the uppermost layer of the Earth's land surface where plants grow?

Explanation:

Link:

Question (2)

Which of the following is the main source of soil formation?

Explanation:

Link:

Question (3)

A rock sample has a mass of 500 g. If weathering breaks it into five equal pieces, what is the mass of each piece?

Explanation:

Link:

Question (4)

Which process gradually breaks large rocks into smaller particles to form soil?

Explanation:

Link:

Question (5)

Which component of soil is formed from decayed plants and animals?

Explanation:

Link:

Question (6)

A soil sample contains 40% sand. How much sand is present in 250 g of soil?

Explanation:

Link:

Question (7)

Which type of soil particle is the largest in size?

Explanation:

Link:

Question (8)

Why is humus important for soil?

Explanation:

Link:

Question (9)

A farmer has 600 kg of soil. If 15% of it is humus-rich material, how much humus-rich material is present?

Explanation:

Link:

Question (10)

What is a mineral?

Explanation:

Link:

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