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Question (31)

QN005783

A farmer adds 80 kg of compost to 320 kg of soil. What is the total mass obtained?

(A) 360 kg
(B) 380 kg
(C) 400 kg
(D) 420 kg

Correct Answer: C

Explanation:

320 + 80 = 400 kg.

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Question (32)

QN005784

Why do roots grow well in soil containing air spaces?

(A) Roots need air for respiration
(B) Roots need only sunlight
(C) Roots convert air into rocks
(D) Roots avoid water completely

Correct Answer: A

Explanation:

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Question (33)

QN005785

A mining area yields 250 tonnes of mineral ore. If 40 tonnes are used immediately, how much ore remains?

(A) 190 tonnes
(B) 200 tonnes
(C) 210 tonnes
(D) 220 tonnes

Correct Answer: C

Explanation:

250 − 40 = 210 tonnes.

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Question (34)

QN005786

Which practice helps conserve soil?

(A) Excessive deforestation
(B) Uncontrolled mining
(C) Planting trees and vegetation
(D) Removing all grass cover

Correct Answer: C

Explanation:

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Question (35)

QN005787

A school garden has 200 m² of land. If 35% is covered with fertile loamy soil, what area is covered by loamy soil?

(A) 60 m²
(B) 70 m²
(C) 80 m²
(D) 90 m²

Correct Answer: B

Explanation:

35% of 200 = 70 m².

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Question (36)

QN005788

Soil erosion refers to:

(A) Formation of new rocks
(B) Wearing away of topsoil by natural agents
(C) Growth of humus
(D) Collection of minerals underground

Correct Answer: B

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Question (37)

QN005789

A container holds 2 kg of soil. If 750 g of water is added, what is the total mass?

(A) 2.25 kg
(B) 2.50 kg
(C) 2.75 kg
(D) 3.00 kg

Correct Answer: C

Explanation:

2 kg + 0.75 kg = 2.75 kg.

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Question (38)

QN005790

Which observation best indicates the presence of minerals in rocks?

(A) Different colours and properties of rocks
(B) Continuous movement of rocks
(C) Production of clouds
(D) Growth of leaves on rocks

Correct Answer: A

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Question (39)

QN005791

A field loses 50 kg of soil during heavy rain from an initial 950 kg. How much soil remains?

(A) 850 kg
(B) 875 kg
(C) 900 kg
(D) 925 kg

Correct Answer: C

Explanation:

950 − 50 = 900 kg.

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Question (40)

QN005792

Why are soil, rocks and minerals considered valuable natural resources?

(A) They support agriculture, construction and industry
(B) They exist only in mountains
(C) They can be created instantly by humans
(D) They have no economic importance

Correct Answer: A

Explanation:

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Question (31)

A farmer adds 80 kg of compost to 320 kg of soil. What is the total mass obtained?

Explanation:

Link:

Question (32)

Why do roots grow well in soil containing air spaces?

Explanation:

Link:

Question (33)

A mining area yields 250 tonnes of mineral ore. If 40 tonnes are used immediately, how much ore remains?

Explanation:

Link:

Question (34)

Which practice helps conserve soil?

Explanation:

Link:

Question (35)

A school garden has 200 m² of land. If 35% is covered with fertile loamy soil, what area is covered by loamy soil?

Explanation:

Link:

Question (36)

Soil erosion refers to:

Explanation:

Link:

Question (37)

A container holds 2 kg of soil. If 750 g of water is added, what is the total mass?

Explanation:

Link:

Question (38)

Which observation best indicates the presence of minerals in rocks?

Explanation:

Link:

Question (39)

A field loses 50 kg of soil during heavy rain from an initial 950 kg. How much soil remains?

Explanation:

Link:

Question (40)

Why are soil, rocks and minerals considered valuable natural resources?

Explanation:

Link:

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