Weather Systems

Question 1

What is an air mass

Answer 1

A large body of air which takes on temperature and moisture characteristics of the area it is situated.

Question 2

Depression is a

Answer 2

Area of low pressure

Question 3

Air movement in a depression

Answer 3

Air is rising

Question 4

Cloud cover in a depression

Answer 4

As it rises,cools, condenses, clouds form

Question 5

Wind speed in depression

Answer 5

Winds are strong, blowing into the centre of low pressure. The isobars are close together

Question 6

Direction of wind

Answer 6

Anticlockwise

Question 7

Duration of a depression

Answer 7

Around 24 hours

Question 8

Sequence of weather in a depression

Answer 8

1. The warm front approaches. At the warm front warm air rises over cold air so clouds form and rain falls

Question 9

Step 2

Answer 9

Between the fronts is the warm sector, temp rises a little, heavy rain stops and there may be some drizzle

Question 10

Step 3

Answer 10

The cold front arrives. Warm moist air is lifted over the cold air so clouds and heavy rain occur.

Question 11

Step 4

Answer 11

Cold sector with lower temperatures. Cloud breaks up and showers become fewer.