Chapter 12: Weather Maps — Online MCQ Test
GEOGRAPHY · CLASS 11th · Tamil Nadu State Board
Practice Chapter 12: Weather Maps with a free chapter-wise online MCQ test.
This chapter covers: This chapter covers weather symbols isobar patterns wind direction indicators and weather map interpretation. Students analyze Indian Daily Weather Reports IDWR to understand synop....
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Chapter 12: Weather Maps — Important Questions & Answers
What does an isobar represent on a weather map?
- A. Lines joining places of equal temperature
- B. Lines joining places of equal atmospheric pressure
- C. Lines joining places of equal rainfall
- D. Lines joining places of equal wind speed
Answer: B. Lines joining places of equal atmospheric pressure
Isobars are lines on a map connecting points that have the same barometric pressure at a specific time.
Isobars are lines on a map connecting points that have the same barometric pressure at a specific time.
Which organization publishes the Indian Daily Weather Report (IDWR)?
- A. ISRO
- B. Indian Meteorological Department (IMD)
- C. National Remote Sensing Centre
- D. Survey of India
Answer: B. Indian Meteorological Department (IMD)
The India Meteorological Department is the agency responsible for preparing and publishing the IDWR.
The India Meteorological Department is the agency responsible for preparing and publishing the IDWR.
What does a series of closely spaced isobars on a weather map indicate?
- A. Calm weather
- B. Stable air mass
- C. Strong winds and steep pressure gradient
- D. High humidity
Answer: C. Strong winds and steep pressure gradient
Closely spaced isobars signify a steep pressure gradient, which results in higher wind speeds.
Closely spaced isobars signify a steep pressure gradient, which results in higher wind speeds.
Analyze the pattern: If isobars are circular with low pressure at the center, it represents:
- A. An Anticyclone
- B. A Ridge
- C. A Cyclone
- D. A Col
Answer: C. A Cyclone
A low-pressure system where winds circulate inwards is known as a cyclone.
A low-pressure system where winds circulate inwards is known as a cyclone.
Why is the 1000mb isobar often taken as a reference line in pressure analysis?
- A. It is the exact global average pressure
- B. It serves as a benchmark for determining high and low pressure systems
- C. Wind never crosses the 1000mb line
- D. It marks the tropopause
Answer: B. It serves as a benchmark for determining high and low pressure systems
1000mb serves as a standard reference point for synoptic meteorologists to classify systems relative to mean sea-level pressure.
1000mb serves as a standard reference point for synoptic meteorologists to classify systems relative to mean sea-level pressure.