ATSC Exam 3 Questions and Answers
Are pressure differences much greater vertically than horizontally? - Answer-Yes
Because small height variations cause large changes in pressure what needs to be
corrected? - Answer-Station pressure
Station pressure is normally adjusted to a pressure at 0 meters this is reffered to as
what? - Answer-Mean sea level (MSL)
What is the adjusted station pressure called? - Answer-Sea-level pressure (SLP)
Near the Earth's surface, pressure decreases by how much? - Answer-10mb/100m
We add 10mb/100m of elevation to get SLP. - Answer-True
Adjusted sea-level pressure readings from weather stations can be plotted on what? -
Answer-A surface map
What are line connected points of equal pressure called? - Answer-Isobars
Isobars are normally drawn in what intervals? - Answer-4mb intervals
Isobars show areas of surface low and high pressure systems. - Answer-True
Constant heigh is... - Answer-Sea-level or 0 meters
What are constant pressure charts called? - Answer-Isobaric maps
Are constant pressure charts commonly used in forecasting and weather analysis? -
Answer-Yes
Levels of constant pressure are called what? - Answer-Isobaric surfaces
Variations in density and temperature will cause changes in what? - Answer-Pressure
Lines of constant height on a constant pressure chart are called what? - Answer-
Contour lines or isoheights
Warm temperatures aloft are usually associated w/ what? - Answer-Higher heights
The contour lines usually decrease from south to north because air temperatures
typically decrease from south to north. - Answer-True
, When bends in contour lines are to the south it is called what? - Answer-A trough
Low pressure or cyclones on the surface map are often associated w/ what? - Answer-A
trough on the upper-air charts
High pressure, or anticyclones on the surface map are often associated w/ a ridge on
the upper-air charts. - Answer-True
Contour lines on both charts give and indication of what? - Answer-Wind direction
The movement of wind depends upon what? - Answer-The force acting upon the air
The movement of wind is governed by Newton's Laws of Motion. - Answer-True
What is Newton's first law of motion? - Answer-An object at rest will remain at rest and
an object in motion will remain in motion if there is no force exerted on the object
What is Newton's second law of motion? - Answer-The force exerted on an object
equals its mass times acceleration
What is the pressure gradient? - Answer-The change in pressure over a distance
The stronger the pressure gradient the stronger the... - Answer-Force will be
When isobars are close together, this is called what? - Answer-A strong pressure
gradient
The horizontal difference in pressure will result in what? - Answer-A pressure gradient
force
Pressure gradient force moves from areas of higher pressure to... - Answer-Areas of
lower pressure
Pressure gradient force is what causes the wind to... - Answer-Blow
Highest wind speeds are typically located in areas where... - Answer-Isobars are close
together
Coriolis force describes what? - Answer-An apparent force that is due to the rotation of
the Earth
Because the Coriolis force is not a true force, but an apparent force, it is often called
the... - Answer-Coriolis Effect
What does the Coriolis force cause the wind to do? - Answer-Deflect to the right of the
path in the northern hemisphere and to the left in the southern hemisphere
Are pressure differences much greater vertically than horizontally? - Answer-Yes
Because small height variations cause large changes in pressure what needs to be
corrected? - Answer-Station pressure
Station pressure is normally adjusted to a pressure at 0 meters this is reffered to as
what? - Answer-Mean sea level (MSL)
What is the adjusted station pressure called? - Answer-Sea-level pressure (SLP)
Near the Earth's surface, pressure decreases by how much? - Answer-10mb/100m
We add 10mb/100m of elevation to get SLP. - Answer-True
Adjusted sea-level pressure readings from weather stations can be plotted on what? -
Answer-A surface map
What are line connected points of equal pressure called? - Answer-Isobars
Isobars are normally drawn in what intervals? - Answer-4mb intervals
Isobars show areas of surface low and high pressure systems. - Answer-True
Constant heigh is... - Answer-Sea-level or 0 meters
What are constant pressure charts called? - Answer-Isobaric maps
Are constant pressure charts commonly used in forecasting and weather analysis? -
Answer-Yes
Levels of constant pressure are called what? - Answer-Isobaric surfaces
Variations in density and temperature will cause changes in what? - Answer-Pressure
Lines of constant height on a constant pressure chart are called what? - Answer-
Contour lines or isoheights
Warm temperatures aloft are usually associated w/ what? - Answer-Higher heights
The contour lines usually decrease from south to north because air temperatures
typically decrease from south to north. - Answer-True
, When bends in contour lines are to the south it is called what? - Answer-A trough
Low pressure or cyclones on the surface map are often associated w/ what? - Answer-A
trough on the upper-air charts
High pressure, or anticyclones on the surface map are often associated w/ a ridge on
the upper-air charts. - Answer-True
Contour lines on both charts give and indication of what? - Answer-Wind direction
The movement of wind depends upon what? - Answer-The force acting upon the air
The movement of wind is governed by Newton's Laws of Motion. - Answer-True
What is Newton's first law of motion? - Answer-An object at rest will remain at rest and
an object in motion will remain in motion if there is no force exerted on the object
What is Newton's second law of motion? - Answer-The force exerted on an object
equals its mass times acceleration
What is the pressure gradient? - Answer-The change in pressure over a distance
The stronger the pressure gradient the stronger the... - Answer-Force will be
When isobars are close together, this is called what? - Answer-A strong pressure
gradient
The horizontal difference in pressure will result in what? - Answer-A pressure gradient
force
Pressure gradient force moves from areas of higher pressure to... - Answer-Areas of
lower pressure
Pressure gradient force is what causes the wind to... - Answer-Blow
Highest wind speeds are typically located in areas where... - Answer-Isobars are close
together
Coriolis force describes what? - Answer-An apparent force that is due to the rotation of
the Earth
Because the Coriolis force is not a true force, but an apparent force, it is often called
the... - Answer-Coriolis Effect
What does the Coriolis force cause the wind to do? - Answer-Deflect to the right of the
path in the northern hemisphere and to the left in the southern hemisphere
