Download Entry Task

Monday, April 4th
Entry Task- on ISN 71
For problems 1-3, Decide if the
statements are true. If they are
write them out as is. If they are
false, correct the statement.
1. The gas that varies from 0%-4% in
Earth’s atmosphere is nitrogen.
2. The Coriolis effect influences air
motion across Earth’s surface
3. The changing of a gas to a liquid is
evaporation.
Problem 4, answer IQIA
4. Based on the reading/RSG you did
for 17.1, why do you think we are
reviewing the above information?
Schedule:
• 17.1 notes
Objective:
• ISN 71- I can
understand that
weather changes as
air masses move
• ISN 73- I can
understand that a
front is a boundary
between air masses
Homework:
None 
Please have on desk:
• 17.1 RSG (ISN 70)
Air Mass – a large
volume of air in
which temperature
and humidity are
nearly the same in
different locations at
the same altitude.
• Air masses are formed when a large bunch of
air sits over a part of the planet for several
days.
• In the US, the 4 main air masses always have
two names
• one for moisture
• one for temperature.
• Continental
OR Maritime
describe the
moisture of
the air mass.
• Tropical OR
Polar describe
the temperature
of the air mass.
• Air masses come from different areas on
Earth. Such as:
– Deserts
– Tropical regions
– Even at the poles!
• The area where the mass originates is called
the source region.
– Continental means it
was formed over land
(See the word
“continent” in there?
Hint!)
-
Tropical means it was
formed around the
equator (within 25°N
or S latitude)
– Maritime means it was
formed over water. (See
“marine?”)
-
Polar means it was
formed close to the
poles
• If an air mass stays over it’s source region it’s
more likely to pick up it’s characteristics.
• Air masses can stay put and control the
weather for periods of time from days to up to
months
Who knew
there was a
day
celebrating
ME?!!
• Global winds can cause air masses to move from the
region in which they were formed.
• Once an air mass begins to travel away from the
source region, it will start to pick up the
characteristics of what it is traveling over.
• Fast moving air masses may not change; slower
moving air masses may change.
Entry Task
Tuesday, April
th
5
Schedule:
• Fronts (ISN 73)
Be ready to be randomly called
on to answer the following
Objective:
questions.
• I can understand that a
1. What do you call an air mass
front is a boundary between
that
–
–
–
–
is cold and dry
is warm and dry
is cold and wet
is warm and wet
2. What do you call the place
that an air mass originates?
3. How do air masses move?
air masses
Homework
• Finish ISN 72
• A front is a boundary between air masses. (different
fronts cause different weather patterns)
Cold vs Warm Fronts
• A cold front forms when a cold air mass forces
warm air to rise; forms tall clouds.
• A warm front forms when a warm air mass
pushes a cold air mass; forms flat clouds.
A cold front forms when a cold air mass forces
warm air to rise; forms tall clouds.
These travel pretty fast.
Cold Front
1. The warm air gets quickly pushed up
by the cold air mass. This causes the
atmosphere to become unstable
2. The rapidly cooled water vapor from
the warm air condenses and forms
tall cumulonimbus clouds.
3. Thunderstorms usually occur. ( rain)
What a cold front looks like:
In the winter, a cold front may cause the temp to drop a lot.
In the summer, cold fronts produce drier, cooler air
A warm front forms when a warm air mass
pushes a cold air mass; forms flat clouds.
These happen more gradually over time.
Warm Front
1. Warm air slowly rises over and replaces
the colder, denser air
2. The air along the border of the two air
masses, the warm air condenses to
creating a blanket of clouds in the sky.
3. Warm fronts bring with them extended
periods of rain, sleet or snow.
What a warm front looks like:
• As it approaches, high cirrus then high stratus clouds form.
• The clouds will get lower and lower
• Many hours of precipitation ( think PNW in the winter.)
Similarities between Warm and
Cold fronts
• Use this time to discuss what Warm and cold
fronts have in common
•Both can bring rain
•Both move from E to W
•Both change in temp and weather conditions
•Both are boundaries between two contrasting
air masses
A stationary front occurs when two air
masses push against each other.
Stationary Front
There is a lack of air mass
movement for a period of time.
1. The air in the cold and warm air
masses may still move side to
side
2. But for the most part it just stays
“stationary” ( no movement)
What a stationary front looks like:
• Cloudy skies
• A high pressure system is formed when air moves all
the way around a high-pressure center.
• When a high pressure-system stays in one location
for a long time, an air mass may form.
• A low pressure system is a large weather
system that surrounds a center of low
pressure.
• It begins as air moves around and inward
toward the lowest pressure and then up to
higher altitudes.
Fronts and Pressure Systems ISN 72
High and Low Pressure Systems
Entry Task
Wednesday, April
th
6
Schedule:
• Storms (ISN 75)
Share your homework with
Objective:
your neighbor. Add
• (ISN 75) I can understand
anything to your fronts
that low pressure systems
and pressure systems
and vertical air motion can
diagrams that needs to be
cause storms
added.
Homework
• Read/RSG 17.2 and 17.3
Please have on desk:
• ISN 72
Entry Task
Thursday, April 7th
On ISN 74 Answer the
following questions
using full sentences,
IQIA.
1. Where and when do
hurricanes form?
2. What conditions
produce
thunderstorms?
3. How do tornadoes
form?
Schedule:
• Storm Video (ISN 74)
Objective:
• (ISN 74) I can understand
important information about
storms
Homework:
• Notebook Check tomorrow Pages
68-75
Please Have on Desk:
• ISN 75
Entry Task
Friday, April 8th
Get your notebook ready
for the check. It is on
pages 68-75.
Schedule:
• Notebook Check
• Storm video
Objective:
• I can learn about different
types of storms
Homework
• Have a wonderful break!
Please have on desk:
• Notebook