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Entry Task
Monday March 21st
Grab a paper from the
front. Complete it and
glue onto ISN 57
Schedule:
• Finish Wind Notes
• Global Winds (ISN 59)
Objective:
• ISN 59 I can understand that
uneven heating causes air to
move and that the Earth’s
rotation affects wind direction
Homework:
• 16.1 and 16.2 Quiz tomorrow.
Pressure Gradient
Force
• On the diagram use
arrows to indicate the
direction of air flow
due to the pressure
gradient force.
PGF + Coriolis Force
(Effect)
• On the diagram use
arrows to indicate the
direction of air flow
due to the Pressure
Gradient force and
the Coriolis force.
PGF + Coriolis Force +
Friction
• Now combine the
three forces to
indicate wind
direction.
Low Pressure Center
• Winds converge (come together) in low
pressure regions as air is pushed away from
high pressure regions.
• The air in the center must go somewhere, so
when air converges near a low, it is forced
upward.
• As the air cools, it cannot hold water vapor.
This vapor condenses, which forms clouds
and precipitation.
• Rain, sleet, hail, and snow often take place
near low pressure areas.
High Pressure Center
• When air diverges (moves away from)
high pressure areas, the air above sinks
to fill the empty space.
• The sinking air warms.
• As the air warms, it can hold more water
vapor.
• The clouds will evaporate.
• Due to this, high pressure areas are
usually dry.
Narrow regions of air
travel in west to east
flowing jet streams
about 12 km above the
surface of Earth just
under the stratosphere
These winds are fast
moving currents of
air that run for
several thousand
miles but are
relatively thin. They
move in a wavy
pattern following the
contours of low and
high pressure areas
The wavy path
changes positions
with the seasons.
During the winter
months, jet streams
are stronger because
Polar Regions
become colder, but
the temperature near
the equator stays
about the same
Jet streams bring
cool, polar air down
from the north and
warm, tropical air up
from the south. If the
ridge of the jet
stream is sitting over
you it is generally
warm and dry. If the
trough is sitting
under you , it is
generally very cold
and snowy or rainy
Entry Task
Tuesday March 22nd
On ISN 60
Answer the following
questions using full
sentences, IQIA.
1. How do mountains and
bodies of water affect
patterns of heating
and cooling?
2. When do sea breezes
occur?
3. When do mountain
breezes occur?
Schedule:
• Local winds (ISN 61)
• Wind and Air Pressure Review
(ISN 60)
• 16.1 and 16.2 take home Quiz
Objective:
• ISN 61 I can understand how
local winds form
• I can be assessed on
information about air pressure
and wind
Homework:
• Finish Take home quiz
Local Winds
• Split page 61 in half.
• Label the top half “Sea Breeze”
• Label the bottom half “Mountain/Valley
Breeze”
• For each, write how the wind blows and
why. Draw a labeled Diagram to support
your explanation.
• Look at page 549 to help.
Local Winds
Sea Breeze
Answer the following on ISN 60 (Local Winds
Questions). IQIA.
1. What is the relationship between air pressure and
wind?
2. The uneven heating of Earth causes what?
3. What factor determines the strength of wind?
4. What winds travel thousand of kilometers in steady
patterns?
5. What causes the Coriolis effect?
6. Global winds travel along how many routes in each
hemisphere?
7. In which direction do winds curve in the Northern
Hemisphere?
1. What is the relationship between air pressure and
wind? Differences in air pressure cause winds
2. The uneven heating of Earth causes what? Air
circulation
3. What factor determines the strength of wind? The
difference in air pressure between two areas
determines the strength of wind
4. What winds travel thousand of kilometers in steady
patterns? Global winds
5. What causes the Coriolis effect? Earth’s rotation
6. Global winds travel along how many routes in each
hemisphere? Three
7. In which direction do winds curve in the Northern
Hemisphere? To the right
Wednesday, March 23rd
Entry Task
Review: think back to the
water cycle. Can you
describe evaporation,
condensation and
precipitation?
Schedule:
• Grade Quiz
Objective:
• I can understand information
about air pressure and winds
• (ISN 62) I can understand
that most clouds form as air
rises and cools
Homework:
Read 16.3 and do 16.3 RSG
(ISN62)
Please have on desk:
• 16.1 and 16.2 Take home quiz
Entry Task
none
Thursday, March 24th
Schedule:
• Cloud notes
• Cloud Types
Worksheet
Objective:
• ISN 63 I can classify
cloud types based on
their characteristics
Homework:
• Finish Cloud Types WS
Please have on desk:
• 16.3 RSG ISN 62
Most Clouds Form as Air
Rises and Cools
Ch. 16:Earths atmosphere is a
blanket of gases that supports
and protects life
What you’ve learned
• Water vapor circulates
from Earth to the
atmosphere
• Warm air is less dense
than cool air and rises
What your going to learn in
16.3
• How water in the
atmosphere changes
• How clouds form
• Characteristics and types
of clouds
How clouds form
• It rains and there are water puddles all over the
ground.
• As it starts to heat up the water evaporates and
turns into water vapor.
• The vapor rises and as it rises it gets colder.
• This causes water vapor to freeze or form tiny
water droplets.
• As it all condenses they form clouds.
• Once they get too heavy they simply fall as
precipitation.
Different types of clouds
• Cirrus: appear feathery or whispy
• Cumulus: clouds that can grow to be very tall
• Stratus: clouds that form in flat layers
Word Parts tell more about clouds:
• With nimbo- or nimbus- it means it’s a type of
cloud that produces precipitation
• With the prefix alto- it means clouds at a
medium altitude
Cirrus Clouds
• Form in very cold air
at high altitudes
• Made of ice crystals
and have a wispy or
feathery appearance
• Usually seen in good
weather but they can
sometimes mean a
storm is coming
Cumulus Clouds
 Puffy white with dark
bases(look like cotton
balls)
 Usually occur during
good weather when
warm air rises an its
water vapor condenses
 If they get really tall
they can produce
showers
 Cumulonimbus are the
largest and cause
thunderstorms(can be
11miles high)
Stratus Clouds
• Smooth gray clouds
that form in layers
• Produce light
precipitation
• The higher up they
form, the thinner they
are
Fog
• Fog is a cloud that rests on the ground or
a body of water
• Forms when a surface is colder than the
air above it
• Clears as ground is heated up
Humidity
• The absolute humidity is the
mass of the water vapor in a
given volume of air or gas.
• It’s unit of measurement is
grams per cubic meter
Relative Humidity
• Relative humidity is the ratio of the amount of
water vapor in a volume of air compared to the
amount needed for saturation at the same
temperature
• Saturation: a condition in which the amounts of
precipitation and condensation are equal
• Varies with temperature
• Expressed as a percentage
• Relative humidity=(actual amount of water/total
amount the air can hold) X 100
Dew Point
• As the temperature rises, the amount of water
vapor the air holds also rises.
• If the temperature cools, the atmosphere cannot
hold as much water. When this happens, the
water vapor leaves the air in the form of liquid
water, this is called dew.
• Dew point- when the water vapor turns to liquids
• Varies each day and from place to place
• Depends on the temperature and amount of water in
the air
Human Perception
Dew
Human Perception
Over 80°F
Severely high. Even deadly for asthma related
75-80°F
Extremely uncomfortable
70-74°F
Very humid, quite uncomfortable
65-69°F
Somewhat uncomfortable for most people at upper edge
60-64°F
OK for most, but all perceive the humidity as being high
55-59°F
Comfortable
50-54°F
Very comfortable
Under 50°F
A bit dry for some
Entry Task
Friday, March
On ISN 63- under your
notes
Answer the following
questions using full
sentences, IQIA.
1. What is humidity?
2. The temperature at
which air will reach
saturation is called
what?
3. What are clouds made
of?
4. What do cloud droplets
condense on?
th
25
Schedule:
• Finish Cloud Notes
• Types of Precipitation
Objective:
• I can understand that water
falls to Earth’s surface as
precipitation
• I can identify and explain the
different types of
precipitation
Homework
• 16.4 RSG and 16.4 Questions
Please have on desk:
• ISN 62 and 64