Weather systems

Question 1

What is an Air mass ?

Answer 1

A large body of air that is uniform in temperature , atmospheric pressure and humidity

Question 2

What is a Front ?

Answer 2

It’s the boundary between air masses

Question 3

What’s a cold front ?

Answer 3

1. It’s cold air rising
2. It forms when warm air has to rise quickly over a large cold air mass
3. The warm air cools and condenses , forming heavy clouds of rain

Question 4

What is a warm front ?

Answer 4

1. It’s a warm air mass that is moving
2. It forms when warm air moves slowly over cold air.
3. It could and condenses to create dark clouds and continuous rainfall

Question 5

How do we call areas of high pressure ?

Answer 5

Anticyclones

Question 6

What are called areas of low pressure?

Answer 6

Cyclones or depressions

Question 7

What is the weather at low pressure ?

Answer 7

Wind blows, air rises and produces clouds and condensation, frequent storms , it’s cold

Question 8

What is the weather at high pressure?

Answer 8

Dry, warm , sunny, cloud free, light winds

Question 9

What are the 3 types of rain ?

Answer 9

1. Relief rain
2. Frontal rain
3. Convenctional rain

Question 10

Describe conventional rainfall

Answer 10

1. Heated ground heats the shallow layer of air
2. The moisture on the ground evaporates
3. Warm, moist pockets of air rise quickly
4. Rising air cools and condenses and forms clouds

Question 11

Describe relief rainfall

Answer 11

1. Wet warm air is forced over mountains
2. It cools down and condenses and it forms clouds
3. After the rainfall the drier air descends on the other side of the mountain

Question 12

How do we call high clouds?

Answer 12

Cirrus ( transparent and ice crystals )

Question 13

How do we call middle level clouds ?

Answer 13

Stratus ( layered )

Question 14

How do we call low level clouds ?

Answer 14

Cumulus ( fluffy)