NS-2 Nautical Sciences Unit 3, Chapter 2: Clouds and Fog
This is an Closed Book, Multiple-choice exercise.
Use your mouse to click the box next to the most correct answer. If you fail to select the correct answer you must try again until you select the correct answer.
What are hygroscopic nuclei?
Fragments of matter in the atmosphere that readily absorb moisture.
Small pieces of matter that prevent the formation of rain droplets within clouds.
The atomic particles of hydrogen and oxygen that make up the majority of the water vapor in clouds and fog.
Protons of Hydrogen and Helium that have had their electrons stripped away in the upper atmosphere by the solar wind.
This is the scientific term used to describe raindrops.
As water droplets begin to condense in the air, depending on the temperature and winds, several things can happen. Which of the following is NOT one of these several things?
All of the things listed here can happen, depending on the temperature and wind.
They may reevaporate and rise further into the atmosphere.
They may rise and freeze into ice crystals.
The may collide with other droplets and form larger drops that become heavy enough to fall as rain.
Which of the following is not one of the three basic cloud types?
Nimbus
Stratus
Cirrus
Cumulus
Which descriptive term, when used with one of the three basic cloud types, indicates "rain" clouds?
Nimbo
Alto
Fracto
Cirro
Hydro
Which descriptive term, when used with one of the three basic cloud types, indicates "windblown" clouds?
Fracto
Nimbo
Alto
Cirro
Hydro
Which of the following terms is NOT used when classifying clouds in relation to their altitude?
Building
Towering
High
Middle
Low
Exceptionally high clouds with bases in the low-altitude area are known as what?
Towering
Building
Altocumulus
Altostratus
Cirrostratus
Which of the following is NOT one of the main low cloud types?
Altostratus
Stratus
Nimbostratus
Stratocumulus
Cumulus
Which low level type of cloud is described as an irregular, rounded mass of clouds spread out in puffy or rolling layers?
Stratocumulus
Nimbostratus
Cumulonimbus
Altocumulus
Cirrocumulus
Which general type of clouds often have the prefix "alto" added to their name?
Middle level clouds
Lower level clouds
High level clouds
Towering clouds
Building clouds
Which of the following is NOT a type of high cloud?
Altocirrus
Cirrus
Cirrostratus
Cirrocumulus
All of the listed clouds are examples of high clouds.
What is the only type of cloud that does not leave a shadow on the Earth?
Cirrocumulus
Cirrostratus
Altostratus
Altocumulus
All clouds cast shadows.
What type of cloud is shown in this picture?
Altocumulus
Nimbostratus
Cumulonimbus
Altostratus
Cirrocumulus
What type of cloud is shown in this picture?
Cirrostratus
Nimbostratus
Cumulonimbus
Altostratus
Cirrocumulus
What type of cloud is shown in this picture?
Cirrus
Nimbostratus
Cumulonimbus
Altocumulus
Cirrocumulus
What type of cloud is shown in this picture?
Cumulonimbus
Nimbostratus
Cirrus
Altocumulus
Cirrocumulus
What type of cloud is shown in this picture?
Cumulus
Nimbostratus
Cirrus
Stratus
Cirrostratus
What type of cloud is shown in this picture?
Nimbostratus
Cumulus
Cirrus
Stratus
Cirrostratus
What type of cloud is shown in this picture?
Stratocumulus
Nimbostratus
Cirrus
Stratus
Cirrostratus
At sea, fleecy white clouds on the horizon that are seemingly stationary usually indicate what?
That an island or other landform is nearby.
That a storm is approaching.
That fair weather is ahead.
A hurricane or typhoon is to be expected.
They generally indicate the direction the ship is traveling.
On average, how much larger than a cloud moisture droplet is a fully-formed raindrop?
One million times larger
Ten times larger
One hundred times larger
Five hundred times larger
A thousand times larger.
What is the name of the process whereby cloud droplets grow to a size large enough to fall as rain or snow by combining together?
Coalescence.
Insolation
Convection
Advection
Ionization
What type of crystals are dropped by aircraft into clouds to "seed" the clouds in an attempt to cause rainfall?
Silver-iodide.
Carbon monoxide
Silver-nitrate
Zircon
Iron-nitrite
Which of the following statements is true concerning rainmaking?
Seeding can cause rain to come a bit earlier than it would have naturally.
Seeding cannot make more rain to fall than would have fallen naturally.
Seeding can cause rain to fall over a large area.
Seeding can cause rain to fall from fair skies.
Silver-iodide seeding is more expensive than carbon-dioxide seeding.
When rain formed in relatively warm air falls through a layer of freezing air, what is the result?
Sleet
Hail
Snow
Ice Storms
Fog
What is similar to dew, but only occurs at temperatures below freezing?
Frost
Fog
Sleet
Hail
Snow
What is the name of the type of fog that is formed when warm air moves over colder water?
Advection fog.
Wind fog.
Frontal fog.
Radiation fog.
Steam fog.
How is steam fog formed?
When cold air moves over warm water.
When warm air moves over cold water.
When warm air moves over warm land.
It is caused by the Earth giving off heat at night.
It is caused when cold air moves over cold land.
What type of fog forms only at night, over a land surface?
Radiation fog
Advection fog
Steam fog.
Frontal fog
Moon fog
What type of fog can be extremely hazardous for automobile drivers inland?