MET O

What is defined as the distance one can see as determined by light and weather conditions

VISIBILITY

What is often defined as a visibility between 1000m and 5000m

MIST

What condition gives a visibility below 1000m

FOG

What will form when warm moist air blows over a cold surface of the sea and is cooled below its dew point

ADVECTION FOG

What would be the result when very cold air blows over a warmer sea surface where evaporation is taking place

FROST SMOKE OR SEA SMOKE OR STEAM FOG

W hat term is used that means visibility is more than 5 nautical miles

GOOD VISIBILITY

Which of the following means that the visibility is up to 2 nautical miles

POOR VISIBILITY

What is that violent intensely cold wind laden with snow, which restricts visibility

BLIZZARD

What fog forms over land and on banks of the rivers but it sometimes drift over coastal waters

ADVECTION FOG

Which of the following factors reduce visibility which is caused by solid particles in the air

HAZE

Which of the following is the difference in air pressures in different areas

LOCAL WINDS

What wind is caused by thermal and considered upslope winds which occur over slopes which are heated by the sun

ANABATIC WINDS

What downslope winds occur over slopes which are cooled

KATABATIC WINDS

What are the result of differential heating of the land and the sea which occur by day, when the land becomes warmer than the sea

SEA BREEZES

Which of the following occur at night and in the early morning when the land is cooler than the sea

LAND BREEZE

How often monsoon wind changes direction

SEASONAL

Which direction do Monsoon winds blow

PREVAILING OR STRONGEST WINDS

Which air circulation cell moves in the opposite direction to the two other cells and acts rather like a gear

FERREL CELL

What air circulation cell sinks over the highest latitudes and flows out towards the lower latitudes at the surface

POLAR CELL

Which wind blow towards the equator within the Hadley cells

TRADE WINDS

What are relatively large bodies of air that are fairly horizontally uniform in characteristics

AIR MASS

Where do Polar front depressions usually originate

TEMPERATE ZONES

What is that boundary line between polar and tropical air masses

POLAR FRONT

Which is a front in which cold air is replacing warm air at the surface

COLD FRONT

How do you classify an air mass which is of Arctic origin

CONTINENTAL ARCTIC

What is the source region of an air mass which is formed over the land

CONTINENTAL

What is the process where an air mass changes its characteristics after it has moved and acquires the characteristics of the underlying surface

MODIFICATION

What colour represents the cold front in a weather map

BLUE

What do you call the areas where air masses form

SOURCE REGION

What is the visibility condition at the passage of a warm front

OFTEN POOR

What is a low-pressure area formed at the boundary between two different air masses which occurs in middle or higher latitudes

FRONTAL DEPRESSION

Which of the following is the term means the formation of a frontal depression

FRONTOGENESIS

What term refers to the decay or weakening and final dissipation of a frontal depression

FRONTOLYSIS

What happens to the wind direction when there is a frontal depression

STEADY

What is the effect of a frontal depression to the atmospheric pressure

FALLS STEADILY

What do you call the leading edge of a wave in a frontal depression

WARM FRONT

When an occlusion occurs, the depression will

GONE/DISSIPATE

In the Northern hemisphere, what direction do Polar front depressions tend to move predominantly

NORTHEASTERLY

When cold front is approaching warm air, what do you think will happen

WARM AIR RISES AND COOLS DOWN AND CAUSES THUDERSTORMS

In a depression, the portion between the cold and warm fronts is called

WARM SECTOR

What is a weather phenomenon defined as a large-scale circulation of winds around a central region of high atmospheric pressure

ANTICYCLONE

How does the wind in an anticyclone circulate in the Northern Hemisphere

CLOCKWISE

What pressure system is associated with anticyclones

HIGH PRESSURE

It is an extension of an anti-cyclone forming an elongated isobars extending outward from the centre of the high pressure system

RIDGE OF HIGH PRESSURE

What is the movement of air in an anticyclone

SUBSIDING

What region is enclosed between two opposite high pressure areas and two low pressure areas

COL

What is the wind circulation around an anticyclone in the Southern hemisphere

COUNTER CLOCKWISE & OUTWARD

How do winds behave in an Anticyclones

GENERALLY LIGHT

Anticyclones appear on weather charts as a series of concentric

WIDELY SPACED ISOBARS

How do you describe the pressure gradient in an anticyclone

WEAK

Which of the following is an intense rotating depression which develops over the tropical oceans

TROPICAL REVOLVING STORM

What is the 1st stage in the development of a tropical cyclone

TROPICAL DISTURBANCE

Which of the following is the side of the tropical storm that faces the equator in the Southern hemisphere

NAVIGABLE SEMI-CIRCLE

What stage in the development of a tropical cyclone follows next after the Tropical Disturbance

TROPICAL DEPRESSION

Which of the following refers to the half side of the storm field that faces the pole in the northern hemisphere

DANGEROUS SEMI-CIRCLE

How would you know that your ship is in the most dangerous quadrant in the northern hemisphere

WIND IS VEERING, PRESSURE IS DECREASING

What is the indication that your ship has already crossed the trough line

AIR PRESSURE STARTS TO RISE

Which region do most dangerous revolving storms form

TROPICAL REGION

What is the usual sequence of directions in which a tropical cyclone moves in Southern hemisphere

W-SW-S-SE

Why tropical cyclones do not form within 5 degrees N or S of the equator

CORIOLIS FORCE