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Question (21)

QN005773

A soil profile has four visible layers. If each layer is 25 cm thick, what is the total thickness?

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

Correct Answer: C

Explanation:

25 × 4 = 100 cm.

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Question (22)

QN005774

Why are minerals important to society?

(A) They are used in making many useful products
(B) They create rainfall
(C) They replace soil completely
(D) They produce oxygen directly

Correct Answer: A

Explanation:

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Question (23)

QN005775

A rock collection contains 45 sedimentary rocks and 35 igneous rocks. How many rocks are there altogether?

(A) 70
(B) 75
(C) 80
(D) 85

Correct Answer: C

Explanation:

45 + 35 = 80.

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Question (24)

QN005776

Which soil is generally considered most suitable for growing many crops?

(A) Sandy soil
(B) Clayey soil
(C) Loamy soil
(D) Rocky soil

Correct Answer: C

Explanation:

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Question (25)

QN005777

A gardener mixes 300 g of clay with 700 g of sand. What is the total mass of the mixture?

(A) 800 g
(B) 900 g
(C) 1000 g
(D) 1100 g

Correct Answer: C

Explanation:

300 + 700 = 1000 g.

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Question (26)

QN005778

Which statement best defines weathering?

(A) The breaking down of rocks into smaller particles over time
(B) The movement of clouds
(C) The formation of minerals from water
(D) The growth of plants in soil

Correct Answer: A

Explanation:

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Question (27)

QN005779

A mineral dealer has 150 mineral specimens. If 20% are mica, how many mica specimens are there?

(A) 20
(B) 25
(C) 30
(D) 35

Correct Answer: C

Explanation:

20% of 150 = 30.

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Question (28)

QN005780

Which soil component helps retain moisture and nutrients for plants?

(A) Humus
(B) Pebbles only
(C) Gravel only
(D) Large rocks

Correct Answer: A

Explanation:

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Question (29)

QN005781

A soil sample contains 500 g of material. If 60 g is humus, what percentage of the sample is humus?

(A) 10%
(B) 12%
(C) 15%
(D) 20%

Correct Answer: B

Explanation:

(60/500) × 100 = 12%.

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Question (30)

QN005782

Which of the following is most likely formed by the accumulation of weathered rock particles and organic matter?

(A) Soil
(B) Cloud
(C) Glacier
(D) Ocean current

Correct Answer: A

Explanation:

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Question (21)

A soil profile has four visible layers. If each layer is 25 cm thick, what is the total thickness?

Explanation:

Link:

Question (22)

Why are minerals important to society?

Explanation:

Link:

Question (23)

A rock collection contains 45 sedimentary rocks and 35 igneous rocks. How many rocks are there altogether?

Explanation:

Link:

Question (24)

Which soil is generally considered most suitable for growing many crops?

Explanation:

Link:

Question (25)

A gardener mixes 300 g of clay with 700 g of sand. What is the total mass of the mixture?

Explanation:

Link:

Question (26)

Which statement best defines weathering?

Explanation:

Link:

Question (27)

A mineral dealer has 150 mineral specimens. If 20% are mica, how many mica specimens are there?

Explanation:

Link:

Question (28)

Which soil component helps retain moisture and nutrients for plants?

Explanation:

Link:

Question (29)

A soil sample contains 500 g of material. If 60 g is humus, what percentage of the sample is humus?

Explanation:

Link:

Question (30)

Which of the following is most likely formed by the accumulation of weathered rock particles and organic matter?

Explanation:

Link:

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