1、A boundary between two air masses is a (n) ______.
A、A、 lapse rate
B、
B、 isobar
C、
C、 front
D、
D、 continent
2、A cloud of marked vertical development (often anvil-shaped) would be classified as ______.
A、A、 cirrus
B、
B、 cirrocumulus
C、
C、 altocumulus
D、
D、 Cumulonimbus
3、A cyclone in its final stage of development is called a(n) ______.
A、A、 tornado
B、
B、 anticyclone
C、
C、 occluded cyclone or occluded front
D、
D、 polar cyclone
4、A hygrometer is device used for determining ______.
A、A、 the absolute temperature
B、
B、 atmospheric pressure
C、
C、 wind velocity
D、
D、 relative humidity
5、Advection fog is most commonly caused by ______.
A、A、 air being warmed above the dew point
B、
B、 saturation of cold air by rain
C、
C、 a rapid cooling of the air near the surface of the Earth at night
D、
D、 warm moist air being blown over a colder surface
6、An occluded front is caused by a(n) ______.
A、A、 cold front becoming stationary
B、
B、 warm front becoming stationary
C、
C、 cold front overtaking a warm front
D、
D、 warm front dissipating
7、Clouds appearing in the following order: cirrus, cirrostratus, altostratus, stratus, and nimbostratus usually indicate the approach of a(n) ______.
A、A、 warm front
B、
B、 occluded front
C、
C、 medium front
D、
D、 cold front
8、Pressure gradient is a measure of ______.
A、A、 a high-pressure area
B、
B、 pressure difference over horizontal distance
C、
C、 pressure difference over time
D、
D、 vertical pressure variation
9、The atmosphere in the vicinity of a high pressure areas is called a (n) _____.
A、A、 anticyclone
B、
B、 cold front
C、
C、 occluded front
D、
D、 cyclone
10、A generally circular low pressure area is called a (n) ______.
A、A、 cyclone
B、
B、 anticyclone
C、
C、 cold front
D、
D、 occluded front
11、The legend/symbol which designates an occluded front is represented by a _______.
A、A、 red line
B、
B、 Purple line
C、
C、 blue line
D、
D、 dashed blue line
12、A psychrometer has two thermometers that provide dry bulb and wet bulb temperatures. By comparing these two temperature readings with a set of tables, you can determine the ___
A、A、 atmospheric pressure
B、
B、 wind speed
C、
C、 relative humidity and dew point
D、
D、 wind chill factor
13、A sea breeze is a wind ______.
A、A、 that blows towards the sea at night
B、
B、 that blows towards an island during the day
C、
C、 caused by cold air descending a coastal incline
D、
D、 caused by the distant approach of a hurricane
14、When winds of force reach 10-11 in Beaufort Scale，usually we call such winds as______．
A、A、 Hurricane
B、B．Breeze
C、C．Storm
D、D．Gale
15、Anticyclones are usually characterized by ______.
A、A、 dry, fair weather
B、
B、 high winds and cloudiness
C、
C、 gustiness and continuous precipitation
D、
D、 overcast skies
16、Altocumulus clouds are defined as ________.
A、A、 high clouds
B、
B、 middle clouds
C、
C、 low clouds
D、
D、 vertical development clouds
17、One of the factors which affects the circulation of ocean currents is ___
A、A、 humidity
B、
B、 varying densities of water
C、
C、 vessel traffic
D、
D、. the jet stream
18、Ocean currents are well defined and __.
A、A、 create large waves in the direction of the current
B、
B、 change direction on 3600 during a 24 hour period
C、
C、 remain fairly constant in direction and velocity through out the year
D、
D、 are characterized by a light green color
19、A sling psychrometer is a(n) ______.
A、A、 type of cargo gear
B、
B、 instrument used in celestial navigation
C、
C、 instrument used to measure relative humidity
D、
D、 instrument used to measure specific gravity
