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Which clouds consist mainly of ice crystals and can be defined as ice clouds?

1. Nimbostratus
2. Cirrocumulus
3. Stratocumulus
4. Altostratus
5. Cumulus congestus
6. Cumulonimbus capillatus
7. Altocumulus castellanus.

  • A

    1 and 3.

  • B
    2 only.
  • C
    4 and 7.
  • D
    5, 6, and 7.
  • Cirrocumulus is made up of ice crystals and does not produce precipitation

HIGH CLOUDS - Cirrus, Cirrocumuls, Cirrostratus consist of ice crystals.

CLOUD HEIGHT BANDS

LOW LEVEL CLOUDS
BASES 0 ft – 6500 ft
WATER DROPLETS
 STRATUS ST
STRATOCUMULUS SC
CUMULUS CU
CUMULONIMBOS CB
NIMBOSTRATUS NS
Cumulus and cumulonimbus will, however, have significant vertical development and will extend from LOW to HIGH levels.
CB could extend into lower stratosphere.
MEDIUM LEVEL CLOUDS BASES 6500 ft – 23000 ft ALTOSTRATUS AS
ALTOCUMULUS AC
NIMBOSTRATUS NS – may also be classified as medium level

Characterised by prefix “Alto”
HIGH CLOUDS BASES 16500 ft – 45 000 ft
ICE CRYSTALS		 CIRROSTRATUS CS
CIRROCUMULOS CC
CIRRUS CI

Characterised by prefix “Cirro”.

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