Question

Fill in the blanks, according to the Greenhouse effect.
1. Clouds and gases reflect about (a)____ of the incom ing solar radiation, and absorb some of it but almost (b)____ of incoming solar radiation falls on Earth’s surface heating it, while a small proportion is re flected back.
2. Earth’s surface re-emits heat in the form of (c)____ radiation but part of this does not escape into space as atmospheric gases absorb a major fraction of it.

• A. a—one half, b—one fourth, c—UV radiation
• B. a—one fourth, b—one half, c—UV radiation
• C. a—one half, b—one fourth, c—infrared radiation
• D. a—one fourth, b—one half, c—infrared radiation

Answer 1

Answer: (D)

1. Clouds and gases reflect about one- fourth of the incoming solar radiation, and absorb some of it but almost one-half of incoming solar radiation falls on Earth’s surface heating it, while a small proportion is reflected back.
2. Earth’s surface re-emits heat in the form of infrared radiation but part of this does not escape into space as atmospheric gases absorb a major fraction of it.