Lesson 109

Question 1

What are the 3 main factors that determine cloud characteristics?
TSM

Answer 1

• Temperature of the air (type of droplet)
• Stability of the air (type of cloud)
• Moisture available (thickness of cloud)

Question 2

List the five types of lifting processes or agents.

Answer 2

Frontal lift 
Mechanical turbulence 
Convection 
Orographic lift
Convergence

Question 3

In unstable air, vertical motion will cease only when the temperature of the rising air reaches _________ with the temperature of the surrounding air.

Answer 3

Equilibrium

Question 4

Vertical movement is initiated by a ____________.

Answer 4

Lifting process or agent.

Question 5

What are the two types of processes by which cloud particles can grow?

Answer 5

Ice crystal (or Bergeron) process

Collision (or coalescence) process

Question 6

Rain that freezes on impact is called ___________ and generally falls from _________ and _________.

Answer 6

Freezing rain

Nimbostratus and altostratus

Question 7

List the 3 conditions required for the formation of fog.

HCC

Answer 7

High relative humidity
Condensation nuclei
Cooling of the air or addition of water vapour

Question 8

Name the 5 types of fog.

RAUFS

Answer 8

Radiation
Advection
Upslope
Frontal 
Steam fog (Arctic sea smoke)