The question asks to identify the atmospheric pressure belt associated with the Inter-Tropical Convergence Zone (ITCZ). The ITCZ is defined as the region near the equator where trade winds converge. We need to recall the global pressure belts and their characteristics, especially near the equator.
C) Equatorial Low pressure belt, characterised by rising air and heavy convectional rainfall — This option accurately describes the ITCZ. The convergence of trade winds leads to rising air (convection), which creates a low-pressure zone at the surface and results in heavy convectional rainfall, all characteristic features of the equatorial region.
The question asks about the influence of jet streams. Jet streams are high-altitude winds that play a crucial role in atmospheric circulation. We need to identify which of the given options accurately describes their impact.
D) Weather patterns and the movement of weather systems (such as storms) — Jet streams are a critical component of global atmospheric circulation and are known to significantly influence the formation, intensity, and movement of weather systems, including major storms, across the Earth's surface. Their position and strength can lead to prolonged periods of certain weather conditions.
The question asks to identify the term for the blanket of air surrounding Earth that is essential for life. This requires knowledge of Earth's major spheres.
Correct Option: B) Atmosphere
The question asks about the primary composition of Earth's atmosphere, specifically identifying the two most abundant gases. This is a fundamental knowledge question in geography and environmental science.
Correct Option: C) Oxygen
The question asks about the approximate percentage of nitrogen in Earth's atmosphere by volume. This is a fundamental fact about atmospheric composition that candidates for competitive exams are expected to know.
The Earth's atmosphere is composed of approximately:
From this breakdown, it is clear that nitrogen makes up about 78% of the atmosphere by volume.
A) 78% is the correct percentage for nitrogen in the Earth's atmosphere by volume.
The question asks about the approximate percentage of oxygen in the Earth's atmosphere by volume. This is a fundamental fact about atmospheric composition that candidates for competitive exams are expected to know.
Correct Option: C) 21% — Oxygen constitutes approximately 21% of the Earth's atmosphere by volume. This is a well-established scientific fact crucial for understanding Earth's environment and life processes.