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Flashcards in Revision Tests Deck (420)
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1

A katabatic wind-

A downslope of cold air

2

The surface wind around an area of low pressure in the southern hemisphere-

Clockwise and inwards

3

If the wind direction changes in a clockwise direction it is said to-

Veer

4

The Coriolis force in the southern hemisphere acts-

At right angles to the direction of the wind, causing a deflection to the left

5

A land sea breeze is a wind that blows from the-

Land to sea during the night

6

Close isobars mean-

Strong winds

7

A wind caused by uneven heating in coastal regions flows-

From the sea by day and from the land at night

8

If the forecast wind is 030/20kt, it will blow-

From 030T

9

When flying towards a low in the southern hemisphere, an aircraft would experience-

Left Drift

10

Within the friction layer, with increasing height, the wind-

Backs

11

If you stand with your back to the wind in the southern hemisphere, the region of low pressure will be-

On your right

12

The friction layer extends up to about-

3000ft

13

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

14

Warm fronts always lie along ridges and cold fronts always lie along troughs- TRUE OR FALSE

False

15

A cold front usually lies along a-

Trough of low pressure

16

A cold air mass is characterized by-

Unstable conditions, cumuliform cloud

17

A defined boundary between two air masses is called a

Front

18

Warm air masses are characterized by-

Stable and hazy conditions

19

A cold front is a zone where-

Cold air is displacing warm air at the surface

20

A warm front is a zone where-

Warm air slides over cold air at the surface

21

With the passage of a warm front in the southern hemisphere-

The wind backs, the temperature rises and the pressure fall decreases

22

Following the passage of a warm front, the most likely weather scenario would be-

Nil significant weather

23

The approach of a warm front would be indicated by-

High level cloud, followed by mid level cloud and eventually extensive nimbostratus

24

Frontal thunderstorms would be triggered-

By the passage of a cold front

25

The North West Monsoon-

Brings unstable moist air to Darwin

26

The inter tropic convergence zone is a boundary between-

Airstreams originating in the northern and southern hemisphere

27

The inter tropic convergence zone is found near-

The equator

28

The major hazard of a tropical cyclone to an aircraft is-

Severe turbulence

29

A strong wind across a mountain range will produce-

Strong down currents on the lee side

30

The cyclone season in Australia is from-

November to April