ch 7 Flashcards
The activation temperature of most ice-forming nuclei is ______ 0 °C.
Well below
Hygroscopic nuclei ______ water molecules.
attract
The relative humidity within a cloud is ______ 100 percent.
about
Who is luke howard
The British naturalist who is credited with being among the first to devise a classification of cloud types
cloud types, which one is coldest
cirrus
cloud types, which one is warmest?
stratus
Extreme nocturnal radiational cooling occurs when
skies are clear
A cloud that forms when warm air overrides cold air is
cirrostratus
This cloud does not typically have relatively low bases with the exception
cirrus
Cirrcus clouds are typically composed of
ice crystals only
usually only drizzle falls from which cloud
stratus clouds
Clouds at temperatures between 0 °C and -9 °C are typically composed of
mostly supercooled water droplets.
A _____ cloud develops as a consequence of local convection
cumulus
The convective condensation level (CCL) closely corresponds in altitude to the base of a ______ cloud.
cumuliform
Which one of the following cloud types would most likely be responsible for producing heavy rain?
cumulonimbus
A cloud that exhibits considerable vertical development is
cumulonimbus.
a cloud that may be cold at the top and warm at low levels
cumulonimbus
Cumulonimbus (thunderstorm) clouds typically are
cold at high altitudes and warm at cloud base.
Disk shaped, mountain-wave clouds are known as
altocumulus lenticularis.
A rarely seen cloud that forms in the upper mesosphere and may be composed of ice deposited on meteoric dust
noctilucent
all of the following clouds may be formed by waves propagating horizontally within the atmosphere with the exception of
stratus
To be considered fog, visibility must be restricted to ______or less. Otherwise, the suspension is called mist.
1000m
in dense fog the mixing ratio is …… the saturation mixing ratio
about equal too
Persistent radiation fog is likely to develop on a
river valley bottom.
