CBSE Practical Geography - Geography Ebooks | TheGeoecologist

Question 1

What are the six main weather instruments covered in NCERT Class 11 Chapter 8?

Accepted Answer

The six primary weather instruments are thermometer (temperature), barometer (atmospheric pressure), anemometer (wind speed), hygrometer (humidity), rain gauge (precipitation), and wind vane (wind direction). Each measures a specific atmospheric variable essential for weather analysis and forecasting.

Question 2

How do you interpret isobars on a synoptic weather map?

Accepted Answer

Isobars are lines connecting points of equal atmospheric pressure. Closely spaced isobars indicate a steep pressure gradient and strong winds, while widely spaced isobars suggest light winds. Closed circular isobars represent pressure systems: low pressure (cyclone) with counterclockwise flow in the Northern Hemisphere, and high pressure (anticyclone) with clockwise divergence.

Question 3

Why is Chapter 8 important for competitive exams like UPSC and CUET?

Accepted Answer

Chapter 8 forms the practical foundation of climatology in geography. UPSC Prelims asks 2–3 questions annually on IMD operations, cyclone tracking, and monsoon dynamics rooted in weather instruments and maps. CUET Geography includes 5–7 MCQs on instrument principles, station model decoding, and synoptic chart interpretation. UGC NET requires analytical answers on data quality and forecasting applications.

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