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On a synoptic chart, closely spaced isobars indicate what?

Q: On a synoptic chart, closely spaced isobars indicate what?

A steep pressure gradient — strong winds Wind blows from high to low pressure, deflected by the Coriolis effect. The closer the isobars, the steeper the pressure gradient and the stronger the wind. Widely spaced isobars indicate light winds.

A. A steep pressure gradient — strong winds

B. Frontal activity only — not related to wind strength

C. A gentle pressure gradient — light winds

D. High pressure at the centre of the pattern

What wind speed range and sea description corresponds to Beaufort Force 6?

A. 17–21 knots; fresh breeze; moderate waves, many white horses

B. 28–33 knots; near gale; sea heaps up, streaks of foam

C. 22–27 knots; strong breeze; large waves begin to form, white foam crests extensive

D. 34–40 knots; gale; moderately high waves of greater length

As a warm front passes your position, in what order do conditions typically change?

A. Cumulus builds → heavy showers → rapid clearance → cold and clear

B. Fog → drizzle → clearing → cold front

C. Cirrus cloud → thickening alto/stratus → steady rain → clearing → warmer, humid, possibly foggy conditions in the warm sector

D. Wind backs sharply, brief squall, then long clear period

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