ATSC Exam 3 Questions and Answers
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
Does the magnitude of the Coriolis force vary w/ the wind speed and latitude of the
object? - Answer-Yes
As the wind speed increases, the Coriolis force... - Answer-Increases
In reference to the Coriolis effect the stronger the wind the stronger the what? - Answer-
Deflection
What force is zero at the equator and maximum at the poles? - Answer-The Coriolis
force
What happens when the pressure gradient force and Coriolis force are in balance? -
Answer-The wind will blow parallel to isobars or isoheights
What is it called when the wind blows parallel to the isobars/isoheights due to the
pressure gradient force and Coriolis force being in balance? - Answer-Geostrophic flow
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
Does the magnitude of the Coriolis force vary w/ the wind speed and latitude of the
object? - Answer-Yes
As the wind speed increases, the Coriolis force... - Answer-Increases
In reference to the Coriolis effect the stronger the wind the stronger the what? - Answer-
Deflection
What force is zero at the equator and maximum at the poles? - Answer-The Coriolis
force
What happens when the pressure gradient force and Coriolis force are in balance? -
Answer-The wind will blow parallel to isobars or isoheights
What is it called when the wind blows parallel to the isobars/isoheights due to the
pressure gradient force and Coriolis force being in balance? - Answer-Geostrophic flow
