Revision Tests Flashcards
A katabatic wind-
A downslope of cold air
The surface wind around an area of low pressure in the southern hemisphere-
Clockwise and inwards
If the wind direction changes in a clockwise direction it is said to-
Veer
The Coriolis force in the southern hemisphere acts-
At right angles to the direction of the wind, causing a deflection to the left
A land sea breeze is a wind that blows from the-
Land to sea during the night
Close isobars mean-
Strong winds
A wind caused by uneven heating in coastal regions flows-
From the sea by day and from the land at night
If the forecast wind is 030/20kt, it will blow-
From 030T
When flying towards a low in the southern hemisphere, an aircraft would experience-
Left Drift
Within the friction layer, with increasing height, the wind-
Backs
If you stand with your back to the wind in the southern hemisphere, the region of low pressure will be-
On your right
The friction layer extends up to about-
3000ft
With the passage of a cold front in the southern hemisphere-
What happens to:
- Wind
- Temperature
- Pressure
The wind backs, the temperature falls and the pressure rises
Warm fronts always lie along ridges and cold fronts always lie along troughs- TRUE OR FALSE
False
A cold front usually lies along a-
Trough of low pressure
A cold air mass is characterized by-
Unstable conditions, cumuliform cloud
A defined boundary between two air masses is called a
Front
Warm air masses are characterized by-
Stable and hazy conditions
A cold front is a zone where-
Cold air is displacing warm air at the surface
A warm front is a zone where-
Warm air slides over cold air at the surface
With the passage of a warm front in the southern hemisphere-
The wind backs, the temperature rises and the pressure fall decreases
Following the passage of a warm front, the most likely weather scenario would be-
Nil significant weather
The approach of a warm front would be indicated by-
High level cloud, followed by mid level cloud and eventually extensive nimbostratus
Frontal thunderstorms would be triggered-
By the passage of a cold front