30 Questions
What is the role of condensation nuclei in cloud formation?
Serving as a surface for water vapor to condense on
At what relative humidity do particles start to condense and form clouds?
75%
What is the primary difference between stable air clouds and unstable air clouds?
Stability
What do clouds indicate to meteorologists?
Changes in the weather
What is the main component of a cloud?
Water droplets or ice crystals
Why do some clouds touch the ground while others are only found in the high atmosphere?
Dependent on their altitude
At what height do cirrus clouds generally form?
30,000 feet
What type of weather is usually associated with stratus clouds?
Fair weather
Which type of cloud is described as thick, puffy masses resembling 'cotton balls'?
Stratocumulus
What is the main composition of cirrus clouds?
Ice crystals
Which type of cloud is typically the first sign of an approaching storm?
Cirrus
What does the direction of cirrus clouds point towards?
Air movement at their elevation
What is the primary factor that leads to the formation of radiation fog?
Earth's radiational cooling
Which type of fog is most likely to form when warm moist air moves over a colder surface?
Advection fog
What is a characteristic of advection fog?
Forms when warm moist air moves over a colder surface
In which type of fog do droplets grow larger as condensation begins on less active nuclei?
Radiation fog
What plays an important role in the formation of upslope fog?
Moist air flows up along an elevated plain
When does evaporation fog occur?
When sun evaporates rain from an asphalt road
Which cloud type is composed of ice crystals and has a cold temperature of less than 25℃?
Cirrostratus
What type of clouds usually form from the gradual lifting of air in advance of a cold front?
Altostratus
Which cloud type is known to be the thinnest if formed at higher altitudes and heavier and more dense if closer to the ground?
Altostratus
What characteristic distinguishes cumulonimbus clouds from other cloud types?
They can cause thunderstorms
Which type of cloud is most likely to give the sky a milky white appearance?
Cirrocumulus
What is the common characteristic of all nimbus clouds?
They are any clouds that rain
What is the process of water droplets forming onto aerosols called?
Condensation
Which type of aerosols are emitted as a result of human activities?
Fossil fuel burning emissions
At what range of temperatures does ice nucleation depend on for moderate ice nucleation?
$0℃ > T > -4℃$
What is the main factor that determines ice nucleation on ice look-a-like aerosols?
Temperature
In which temperature range do fog and clouds form due to the existence of supercooled water?
$0℃ > T > -10℃$
Which of the following is NOT a type of natural aerosol?
Fossil fuel burning emissions
Learn about the process of cloud formation when the air's relative humidity reaches around 75% and how condensation nuclei play a crucial role in the development of clouds. Explore how clouds are formed as particles grow larger with increasing relative humidity.
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