atmosphere & climatology section 4 MCQ Questions & Answers Detailed Explanation

Answer: (b)

Ozone in the Earth's stratosphere is created by ultraviolet light striking ordinary oxygen molecules containing two oxygen atoms (O₂), splitting them into individual oxygen atoms (atomic oxygen).

The atomic oxygen then combines with unbroken O2 to create ozone (O₃).

The ozone molecule is unstable and when ultraviolet light hits ozone it splits into a molecule of O₂ and an individual atom of oxygen, a continuing process called the ozone-oxygen cycle.

Chemically, this can be described as,

O₂ + v_uv→ 2O

O + O₂ ↔ O₃

Answer: (b)

Sirocco is a local Mediterranean wind that comes from Sahara and can achieve Hurricane speed in North Africa and Europe. Its Arabic name is Quibli.

Answer: (c)

The equatorial regions are known for convectional rainfall that occurs due to the thermal convection currents caused due to the heating of ground due to insolation

. In these, the warm air rises up and expands then, reaches a cooler layer and saturates, then condenses mainly in the form of cumulus or cumulonimbus clouds.

The equatorial regions receive convectional rainfall almost on a daily basis. The rainfall is of very short duration but in the form of heavy showers.

Answer: (d)

Answer: (d)

Answer: (b)

Doldrums is the name for the equatorial belt of low pressure lying between 5° south and 5° North latitude.