Weather Final Practice Quiz (Exam 2)
Weather is the study of all things that you may take for granted on a daily basis – namely, the rain, the clouds in the sky, sunny days, warm climates and thunder and lightning. How much do you know about it?
- 1.In cloud-to-ground lightning, the stepped leader makes contact with
- A.
Objects on the surface
- B.
A dart leader
- C.
A positive streamer
- D.
A return stroke
- 2.Severe thunderstorms are different from air-mass thunderstorms in that severe thunderstorms
- A.
Contain thunder and lightning
- B.
Have an anvil
- C.
Have a tilted updraft in the mature stage
- D.
Have a strong updraft and downdraft
- E.
Contain hail
- 3.The flood of 1993 had its greatest impact during the _______ months
- A.
Spring
- B.
Winter
- C.
Summer
- D.
Fall
- 4.Hail grows by
- A.
Collisions with graupel
- B.
Accretion of supercooled droplets
- C.
Collisions with frozen raindrops
- D.
Sublimation
- 5.A station at an altitude of 900 m (about 3000 feet) above sea level measures an air pressure of 930 mb. Under normal conditions, which of the values below do you think would be most realistic sea level pressure for this station?
- A.
900 mb
- B.
930 mb
- C.
1020 mb
- D.
1010 mb
- E.
1000 mb
- 6.Which statement below is NOT correct concerning the Coriolis force?
- A.
It deflects winds in opposite directions in the Northern and Southern Hemispheres
- B.
It can cause winds to change direction, but not to increase or decrease in speed
- C.
It causes the winds to deflect to the right in the Northern Hemisphere
- D.
It is strongest at the equator
- 7.The extent of property damage from hail depends on
- A.
The hardness of the hail
- B.
The size of the hail
- C.
All of these factors
- D.
The angle of impact of the hail
- 8.A type of thunderstorm that does not commonly produce hail is a(n) _______ thunderstorm
- A.
Ordinary
- B.
Multicell
- C.
Squall line
- D.
Supercell
- 9.A ______ usually indicates clearing weather or fair weather
- A.
Steadily rising pressure
- B.
Steadily falling pressure
- C.
Constant pressure
- D.
Fluctuating pressure
- 10.The weather conditions associated with the flood of '93 included a strong stationary high pressure system sitting over
- A.
North Dakota
- B.
Texas and Oklahoma
- C.
The southeast US
- D.
The central plains
- 11.Cloudy ice in a hailstone indicates the hailstone formed in an environment that was
- A.
Below freezing, very cold
- B.
About 0 degrees c
- C.
Below freezing, moderately cold
- D.
Warm (above freezing)
- 12.To correctly monitor horizontal changes in air pressure, the most important correction for a mercury barometer measurement is the correction for
- A.
Gravity
- B.
Altitude
- C.
Density
- D.
Temperature
- 13.A conditionally unstable environment needed for thunderstorm development means that air above the lowest levels of the atmosphere must ______ with increasing height
- A.
Cool slowly
- B.
Cool rapidly
- C.
Warm slowly
- D.
Warm rapidly
- 14.For a weather radar, range is determined by
- A.
Timing the return of the pulse
- B.
Measuring the frequency shift of the pulse
- C.
Satellite sensors
- D.
The strength of the pulse returning to the radar
- 15.The strength of the radar energy that returns to a weather radar is called the
- A.
Shift
- B.
Range
- C.
Pulse
- D.
Reflectivity
- E.
Velocity
- 16.Which of the following explain why it is possible to see clouds on satellite images taken at night?
- A.
The clouds emit infrared radiation
- B.
The clouds reflect light coming from the moon
- C.
The clouds emit visible light
- D.
The clouds reflect visible light from the sun
- 17.The surface pressures at the bases of warm and cold columns are equal. Air pressure in the warm column of air will ______ with increasing hight _______ than the cold column
- A.
Decrease, more slowly
- B.
Increase, more slowly
- C.
Increase, more rapidly
- D.
Decrease, more rapidly
- 18.The wind around a surface low pressure center in the Southern Hemisphere blows
- A.
Counterclockwise and inward toward the center
- B.
Counterclockwise and outward from the center
- C.
Clockwise and inward toward the center
- D.
Clockwise and outward from the center
- 19.Isobars on a surface weather map represent
- A.
Locations with the same dew point temperature
- B.
Locations with the same temperature
- C.
Fronts
- D.
All of these
- E.
Locations with the same sea level adjusted pressure
- 20.If you see a lightening stroke and then, 15 seconds later, hear the thunder, the lightning is about ___ miles away
- A.
15
- B.
45
- C.
3
- D.
5
- 21.An ordinary thunderstorm begins to dissipate when
- A.
When the downdraft spreads throughout the cloud and cuts off the updraft
- B.
When all the precipitation particles in the cloud turn to ice
- C.
Lightning neutralizes all the electrical charge in the cloud
- D.
When solar heating at the ground begins to decrease
- 22.What stage of the lightning process produces thunder?
- A.
Return stroke
- B.
Positive streamer
- C.
Stepped leader
- D.
Building electrical potential
- 23.On an upper-level chart, normally we find warm air associated with ______ pressure, and cold air associated with ______ pressure
- A.
High, high
- B.
Low, low
- C.
High, low
- D.
Low, high
- 24.An ordinary (air-mass) thunderstorm is most intense during the ______ stage
- A.
Dissipating
- B.
Mature
- C.
Multicell
- D.
Cumulus
- 25.From the gas law, we know that if pressure is kept constant, density must _____ as temperature increases
- A.
Stay the same
- B.
Increase
- C.
Decrease
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