Aviation weather reports A METAR describes the weather ?

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exemple 71 — Observed at a station at time of report, expected at a station at a given time, expected at a station over a twelve hour period, observed at a station during previous day.

Surface based layers Advection fog forms when ?

exemple 72 — Surface based layers advection fog forms when Moist air moves from a warm surface to a colder surface, the cold ground cools air in contact with it at night, moist air influenced orographic effect, moist cool air moves from a cold surface to a warm surface.

What is the most abundant gas in Earth's atmosphere ?

exemple 73 — What the most abundant gas in earth's atmosphere Nitrogen, ozone, oxygen, carbon dioxide.

In troposphere where most of our rpas fly icao average decrease in temperature per 1000 ft.98°c, 5°c,.65°c,.2°c.
During life cycle of a thunderstorm which stage characterized predominantly downdrafts at cloud base Dissipating stage, cumulus stage, mature stage, tornado stage.
In lower layers of atmosphere we can consider that average pressure decrease with altitude Hpa per 28 ft, 6.5 hpa per 28 ft, hpa perft, hpa per m.
In a cumulonimbus cloud descending air currents can reach a speed of 2ft/min, ft/min, 3 ft/min, 5 ft/min.
Question Section 4: Meteorology 58 Answer 8

By day a sea breeze will Be onshore due to pressure drop on land, be onshore due to pressure increase on land, be offshore due to oceanic lift, be offshore due to oceanic sink.
Question Section 4: Meteorology 58 Answer 9

Roll clouds or rotors are likely to be experienced Along leeward side of a mountain range, on ridge of a mountain range, along windward side of a mountain range, in ascendant area of a mountain range.
Question Section 4: Meteorology 58 Answer 10

Regarding different gases constituting atmosphere Their proportions remain same all altitudes accessible to light aircraft, their proportions increase with altitude, oxygen concentrated in lower layers, nitrogen occupies upper layers, their proportions decrease with altitude.
Question Section 4: Meteorology 58 Answer 11

During summer on arriving to specified area your flight you observe fog and sunlight slashes through fog The flight possible at end of morning, you will be able to take off in 3minutes, you can take off in afternoon, the flight not possible today, you postpone flight the next day.
Question Section 4: Meteorology 58 Answer 12

During summer weather associated to a high pressure system characterized Clear nights, sunny days without cloud or with small cumulus, many foggy days continuous rains during nights, clear nights with fair weather cumulus clouds, days without cloud or advection fogs, continuous rainy days foggy nights.
Question Section 4: Meteorology 58 Answer 13

Without wind what would be position of a wind indicator on an aerodrome Completely vertical, 5 degrees below horizon, 3degrees below horizon, 6degrees below horizon.
Question Section 4: Meteorology 58 Answer 14

In meteorology a low pressure area called A low, an anticylcone, a hurricane, a thalweg.
Question Section 4: Meteorology 58 Answer 15

In meteorology a high pressure area called An anticylcone, a low, a hurricane, a thalweg.