Which cloud type was first officially classified by Luke Howard in 1803?
Stratus
Cirrus
Cumulus
Nimbus
What is the average weight of a typical cumulus cloud?
1.1 million pounds
500,000 pounds
2.4 million pounds
750,000 pounds
What is the maximum speed at which cumulonimbus clouds can develop vertically?
50 mph
100 mph
150 mph
200 mph
Which type of cloud typically forms at the highest altitude, around 60,000 feet?
Cirrus
Altostratus
Noctilucent
Cumulus
Which cloud type forms at the highest altitude, reaching up to 43,000-65,000 feet?
Altostratus
Cirrus
Noctilucent
Cumulus
What is the average weight of water in a typical cumulus cloud?
1.1 million pounds
2.4 million pounds
1.1 billion pounds
500,000 pounds
How many main cloud types did the World Meteorological Organization officially recognize in 1956?
8
10
12
14
Which cloud type moves at the fastest speed, up to 125 mph?
Cumulonimbus
Cirrus
Altostratus
Stratocumulus
What is the temperature typically required for supercooled water droplets in clouds to freeze?
-40°F
-32°F
-25°F
-15°F

