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Question (1)

QN008734

Which of the following is the main source of energy responsible for the uneven heating of the Earth?

(A) Geothermal energy
(B) Solar radiation
(C) Wind energy
(D) Chemical energy

Correct Answer: B

Explanation:

The Sun is the primary source of energy for Earth.

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Question (2)

QN008735

The amount of the Sun’s radiation that reaches the Earth’s surface is called:

(A) Albedo
(B) Solar constant
(C) Insolation
(D) Radiation balance

Correct Answer: C

Explanation:

Insolation refers to solar radiation reaching Earth’s surface.

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Question (3)

QN008736

The average amount of solar energy received per second per square metre at the top of Earth’s atmosphere is approximately:

(A) 140 J s⁻¹ m⁻²
(B) 1400 J s⁻¹ m⁻²
(C) 14,000 J s⁻¹ m⁻²
(D) 14 J s⁻¹ m⁻²

Correct Answer: B

Explanation:

This value is known as the solar constant.

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Question (4)

QN008737

The value of the solar constant is approximately:

(A) 0.14 kW m⁻²
(B) 1.4 kW m⁻²
(C) 14 kW m⁻²
(D) 140 kW m⁻²

Correct Answer: B

Explanation:

Solar constant ≈ 1.4 kW m⁻².

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Question (5)

QN008738

Which electromagnetic radiations from the Sun are mainly responsible for shaping Earth’s climate and supporting life?

(A) Gamma rays, X-rays and microwaves
(B) UV, visible and infrared rays
(C) Radio waves, microwaves and X-rays
(D) Gamma rays, UV and radio waves

Correct Answer: B

Explanation:

About 99% of solar energy falls in UV, visible and IR regions.

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Question (6)

QN008739

Most ultraviolet radiation is absorbed by the:

(A) Troposphere
(B) Hydrosphere
(C) Ozone layer
(D) Biosphere

Correct Answer: C

Explanation:

The ozone layer protects life by absorbing harmful UV rays.

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Question (7)

QN008740

Visible light is especially important because it:

(A) Creates ocean currents directly
(B) Causes radio communication
(C) Provides energy for photosynthesis
(D) Produces greenhouse gases

Correct Answer: C

Explanation:

Photosynthesis depends on visible light.

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Question (8)

QN008741

A surface reflects 85% of incoming solar radiation. Its albedo is:

(A) 0.15
(B) 0.50
(C) 0.85
(D) 1.85

Correct Answer: C

Explanation:

Albedo equals the fraction of radiation reflected.

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Question (9)

QN008742

Which surface is expected to have the highest albedo?

(A) Ocean water
(B) Black soil
(C) Snow
(D) Asphalt road

Correct Answer: C

Explanation:

Snow reflects most incoming solar radiation.

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Question (10)

QN008743

The term “albedo” refers to:

(A) Heat radiated by Earth
(B) Fraction of solar radiation reflected by a surface
(C) Energy absorbed by atmosphere
(D) Amount of cloud cover

Correct Answer: B

Explanation:

Albedo measures reflectivity of a surface.

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Question (1)

Which of the following is the main source of energy responsible for the uneven heating of the Earth?

Explanation:

Link:

Question (2)

The amount of the Sun’s radiation that reaches the Earth’s surface is called:

Explanation:

Link:

Question (3)

The average amount of solar energy received per second per square metre at the top of Earth’s atmosphere is approximately:

Explanation:

Link:

Question (4)

The value of the solar constant is approximately:

Explanation:

Link:

Question (5)

Which electromagnetic radiations from the Sun are mainly responsible for shaping Earth’s climate and supporting life?

Explanation:

Link:

Question (6)

Most ultraviolet radiation is absorbed by the:

Explanation:

Link:

Question (7)

Visible light is especially important because it:

Explanation:

Link:

Question (8)

A surface reflects 85% of incoming solar radiation. Its albedo is:

Explanation:

Link:

Question (9)

Which surface is expected to have the highest albedo?

Explanation:

Link:

Question (10)

The term “albedo” refers to:

Explanation:

Link:

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