Air masses affecting the UK

What is air pressure?

• A large body of air.

• The weight of the air (atmosphere) on the land.

• The direction from which an air mass travels.

• The speed that an air mass travels.

What is an air mass?

• A large body of air in which the temperature, humidity and pressure are very similar.

• The weight of the air (atmosphere) on the land.

• A cold front.

• A warm front.

The UK is affected by five air masses. What name is given to Air mass A (see diagram)?

• Polar maritime (Pm)

• Polar continental (Pc)

• Tropical maritime (Tm)

• Tropical continental (Tc)

• Arctic maritime (Am)

The UK is affected by five air masses. What name is given to Air mass B (see diagram)?

• Polar maritime (Pm)

• Polar continental (Pc)

• Tropical maritime (Tm)

• Tropical continental (Tc)

• Arctic maritime (Am)

The UK is affected by five air masses. What name is given to Air mass C (see diagram)?

• Polar maritime (Pm)

• Polar continental (Pc)

• Tropical maritime (Tm)

• Tropical continental (Tc)

• Arctic maritime (Am)

The UK is affected by five air masses. What name is given to Air mass D (see diagram)?

• Polar maritime (Pm)

• Polar continental (Pc)

• Tropical maritime (Tm)

• Tropical continental (Tc)

• Arctic maritime (Am)

The UK is affected by five air masses. What name is given to Air mass E (see diagram)?

• Polar maritime (Pm)

• Polar continental (Pc)

• Tropical maritime (Tm)

• Tropical continental (Tc)

• Arctic maritime (Am)

Which of the following characteristics are associated with Tropical maritime air masses (Tm)?

• Cool, wet and dull weather, often with strong winds.

• Hot and dry weather in summer.

• Warm and wet weather in summer; mild and wet weather in winter.

• Very cold, dry weather in winter; warm, dry weather in summer.

Which of the following characteristics are associated with a Tropical continental air masses (Tc)?

• Cool, wet and dull weather, often with strong winds.

• Hot and dry weather in summer.

• Warm and wet weather in summer; mild and wet weather in winter.

• Very cold, dry weather in winter; warm, dry weather in summer.

Which of the following characteristics are associated with Polar maritime air masses (Pm)?

• Very cold, wet weather with snow in winter and showers in summer.

• Cool, wet and dull weather, often with strong winds.

• Very cold, dry weather in winter; warm, dry weather in summer.

• Warm and wet weather in summer; mild and wet weather in winter.