Weather
Do Now
1. Weather refers to the state of the atmosphere
at a specific ___
time and place
.
2. Weather describes conditions such as air
___
, wind, ___
pressure
temperature , and the
moisture
amount of ___
in the air.
1. Relative humidity is high when temperature is
low. Explain. 3 lines
As the air cools down, it can not hold the
water vapor so more of it goes in the air.
2. High humidity is associated with: 3 lines
cool damp nights, heavy dew, a fog,
condensation, or rain.
3. Low humidity occurs when it is 3 lines
hot, dry, clear, sunny, windy and when
evaporation is high.
4. Relative humidity=
Amount of water vapor in the air
Max amt of water vapor it can hold
x 100
Do Now
1. Disregarding altitude, when air becomes hot,
it ___, becomes less dense and then rises.
2. When air becomes cold, the molecules ___
and sink.
3. Wind blows from areas of high (density,
temperature: ___, ___) to low pressure (density,
temperature: ___, ___).
1. On a hot sunny day what happens to warm air? 3 lines
2. What happens to air molecules on a chilly day?
On a hot day, the ground heats up the air
above it, expanding the hot air molecules
and making it rise.
2. What happens to air molecules on a chilly day?
On a chilly day, the shady ground cools the
air above it, condensing the cold air
molecules and making it sink.
3. Why does air become cold as you climb up a
mountain?
An increase in altitude makes molecules thin
out (expand). Therefore hot air molecules can
not bounce off each other to create heat.
1. Wind blows from areas of high (density,
temperature: more
___ dense ,cold
___ ) to low pressure
(density, temperature: ___
___).
less dense, hot
3. Which movement does wind blow?
include temp and density
3. Wind blows from area of high pressure (cold,
more dense) to low pressure (warm, less dense).
Red on top of blue water
Blue on top of red water
Activity A, #3
Activity B, #3
Activity C, # 1
Activity C, #3
Activity C, # 4
Activity C, #6
Do Now
1. A dry bulb temperature
air
measures exposed to (dry) ___
2. The wet bulb temperature
humidity in the air.
measures ___
3. It is the lowest temperature
that can be reached by the
evaporation of water only.
___
(For example, it is the
temperature you experience
when your skin is wet as the air
moves by you.)
4. Relative humidity is the amount of ___
moisture in
the air compared to what the air can "hold" at that
temperature.
5. When the air can not "hold" all the moisture, then
dew .
it condenses as ___
Do now
1. High pressure systems are huge areas of stable air
higher
due to an area where the air's pressure is ___
than the pressure in the surrounding area.
2. Air inside these pressure systems falls and as it
warms up.
does, it dries and ___
3. Weather is mostly dry and hasclear
___ skies.
1. High pressure system is an area of skip 3 lines
stable air due to a nearby area that has
higher air pressure.
? Air inside these pressure system falls and as a
result, air dries and warms up.
2. Weather is mostly dry and has clear skies.
Do Now
1. When warm air ___
rises, the area becomes unstable.
2. A low pressure system is created by an area of
warm air meets with cold air and ___ skip one line
pushes the cold air back, forming a cold
front behind it.
3. So you get a warm front first followed by the
___ cold
front.
4. Weather can be from rain to clear skies from the
warm front and ___
snow to winds from the cold front.
the cold
3. So you get a warm front first followed by ___
front.
4. Weather can be from rain to clear skies from the
warm front and ___
snow to winds from the cold front.
Four Types of Air Masses
Polar= cold air mass away from the equator
Tropical= warm air mass close to the equator
Maritime= moist air mass originate from the ocean
Continental= dry air mass over land
Describe the climate by combining two air masses
together:
a. Mojave Desertb. Antarcticac. Key West, Floridad. Aleutian Islands, Alaska-
a. Mojave Desert= Tropical and continental
b. Antarctica= Polar and continental
c. Key West, Florida= Tropical and maritime
d. Aleutian Islands, Alaska= Polar and maritime
http://www.livescience.com/29544
-how-to-read-clouds.html
http://www.livescience.com/34024
-gallery-weird-clouds.html
Do Now
1. Describe these weather conditions.
Clear sky, 25 knots (28 mph), wind moving
from W into a high pressure system.
2. 75% cloud coverage at NW, 50 knots (57 mph),
wind moving from NW into a low pressure
system.
Low pressure system has cold front
moving to SE which means cold air is at
SE and warm air is at NW
3. Clear sky, 40 knots (44mph), wind coming
from NE into a high pressure system.
4. 25% cloud coverage, 30 knots (33
mph), wind coming S into a low pressure
system.
Low pressure system has warm front moving to
NE which means warm air is at SW and cold air
is at NE.
Do Now
1. Clouds are made up of ___ skip 1 line
2. ___ rises and reaches the cold air above. 2
word answer
3. The cold air chills the rising air to where the
dew point (at which ___. Skip 1 line
4. The water vapor in the air ___ skip 1 line
5. An increase in relative humidity (amount of
moisture the air currently holds) means that air
___ .
-1. Clouds are made up of ___
tiny water droplets or tiny ice crystals
collected in the air
2. Hot
___ air rises and reaches the cold air above.
-3. The cold air chills the rising air to where the dew
water vapor in the air converts to
point (at which ___
water droplets) is reached.
condenses and
4. The water vapor in the air ___
forms clouds.
5. An increase in relative humidity (amount of
moisture the air currently holds) means that air ___.
at higher temperatures, holds more moisture.
Clear or cloudy
low or high air pressure
hot or cold air
Top or bottom
In a low/high pressure system….
Notes to accompany handout.
Write the height and the red descriptions.
feathery
Nice weather
gray, rain
Long, flat
Fluffy, white
thunderstorms
Do Now
1. CLOUD FORMATION:
pressure= temp= water in the air= air molecules
form as
condense
water
droplets
Identify Cloud Name
Key “Cloud ID Types”
Cloud Project, part 1 (50 pts)
Materials:
glue, paper, cottonballs, marker
1. Create four different types of clouds with cottonballs.
2. You must have at least one cloud in each elevation (low,
middle, high)
3. Every cloud must be label a name, elevation (include unit),
and one feature.
4. Make sure you draw and color your landscape (buildings,
mountains, airplane, etc).
Part 2 (50 pts)
Complete the worksheet, “Types of Clouds”.
tornado
down
cause
the oc
when
altitud
Do Now
1. Winds at two different altitudes blow at two
different speeds creating wind shear. What is a
wind shear? Skip 2 lines
2. If this column gets caught in an updraft, the
updraft then spins and speeds up creating a
funnel cloud. How does an updraft form? Skip 4
lines
3. The rain and hail in the thunderstorm cause
the funnel to touch down creating a tornado.
How does a downdraft form?
1. What is a wind shear?
It is two different wind speeds are in different
directions over a short distance in the air.
2. How does an updraft form?
The atmosphere is
unstable as warm, moist
air rises up in a cloud that
is warmer than its
environment, like a hot air
balloon.
3. How does a downdraft form?
It is when dry air cooled by the rain becomes
more dense and sinks inside a thunderstorm
cloud.
Do Now
Explain if it is false.
1. Tornadoes appear almost transparent until
they pick up dust and debris or a cloud forms
within a funnel.
2. Tornadoes only occur in the mid-western
parts of the United States.
3. The best place to seek shelter is in a wooden
shed.
1. Tornadoes appear almost transparent until they
pick up dust and debris or clouds form within a
funnel. True
2. Tornadoes only occur in the mid-western
parts of the United States.
False- tornadoes can strike any state
where wind shear meets.
3. The best place to seek shelter is in a wooden
shed. False- Any low level floor of a home,
concrete made, and no windows.
Do Now
1. Name determines location:
Atlantic ocean=
Pacific ocean=
Indian ocean=
2. Spiral rain bands determine location:
clockwise=
counterclockwise=
3. Why is a hurricane called a heat machine?
1. Name determines location:
hurricanes
typhoons
cyclones
2. Spiral rain bands determine location:
Counterclockwise= Northern hemisphere
Clockwise direction= Southern hemisphere
(R) counterclockwise
(L) clockwise
3. Why is a hurricane
called a heat machine?
Hurricanes begin as
tropical storms over the
warm moist waters of
the Atlantic and Pacific
Oceans near the
equator. As the
moisture evaporates it
rises until enormous
amounts of heated
moist air are twisted
high in the atmosphere.
Class Discussion- Hurricane Activity
1. How can we predict a hurricane is forming?
2. What tools can we use in a class activity?
3. Think about your other lab activities.
4. HYPOTHESIS
If
then
because…
MATERIALS skip 5 lines
DATA
Separate paper
if a hurricane starts in a certain area
then it will end up in a different area
because we need to know where it is going to hit
if a hurricane forms
then it will land somewhere else
because we need to know how to be prepared.
if a hurricane has a distance
then we will know where its coming from
because we need to be warned.
Step 3graph
table 2
Step 2your
prediction
Step 1graph
table 1
Do Now
Hurricane Andrew Video
1. Why is Florida more susceptible to hurricanes? 3
lines
2. What was the cause of the rotating updraft? 4 lines
3. Was the wind speed of Hurricane Andrew more
than 175 mph? Explain. 2 lines
4. What do you think? Can hurricanes be a creation of
global warming?
Hurricane Andrew Video
1. Why is Florida more susceptible to
hurricanes?
In the summer, there is a combination of:
warm Atlantic Ocean, increase in humidity
and low pressure systems.
Hurricane Andrew Video2. What was the cause of the rotating updraft?
Water vapor condenses. As it descends, it
picks up moisture from the ocean surface.
This makes the vapor rise again giving it rain
and creating more wind speed.
Hurricane Andrew Video3. Was the wind speed of Hurricane Andrew
more than 175 mph? Explain.
It is a possibility but the radar that followed it
was destroyed by the wind speed.
Hurricane Andrew Video 4. What do you think? Can hurricanes be a
creation of global warming?
No because
Yes because
Not
enough
data?
BINGO REVIEW
1. Tropical, maritime
9. temperature
2. polar, continental
10. no clouds
3. 30 knots
11. wind coming from NE
4. 40 knots
12. wind coming from S
5. 25% clouds
13. warm front
6. high humidity
14. moving to NE
7. low humidity
15. high pressure system
8. purple
16. low pressure system
Review game
1. ___ is associated with cool damp nights,
heavy fog, etc
2. ___ is associated with hot, dry, clear air.
3. Relative humidity is high when ___ is low
explanation
Water vapor
in the air
Amt of vapor
it can hold
winter:
summer:
25%
75%
25%
50%
4. In the hot and cold water lab:
the color ___ was seen as cold water was on top
of hot water.
5. At a __ system, weather is mostly dry and
you get clear skies.
Explanation: in Gizmo, we saw that
cold air can no longer hold water vapor
6. At a ___ system, weather can be from clear
skies to winds and snow.
Explanation: in Gizmo, we saw that warm
air rises bringing water vapor with it.
7. Describe the climate by combining two air
masses:
a. Mexico
b. Canada
8. Describe these weather conditions:
Go to next slide
8a. No clouds, 40 knots (44mph), wind coming
from NE into a high pressure system.
Given:
small feather= 5 knots,
large feather= 10 knots,
triangle= 50 knots
8a.Cloud coverage?
8b.Wind speed?
8c.Wind direction?
8d.Pressure system?
8b. 25% cloud coverage at NE, 30 knots
(33 mph), wind coming from S into a low
pressure system.
8e. Cloud coverage?
8f. Wind speed?
8g. Wind direction?
8h.Pressure system?
8i.Front?
8j. Front direction?
Low pressure system has warm front moving to
NE which means warm air is at SW and cold air is
at NE.
Word bank 2
1. higher ground
2. no windows
3. tornado
4. warm, moist
5. cool, dry
6. Indian Ocean
7. southern hemisphere
8. low pressure
9. brick
10. release
1. In tornadoes and hurricanes, an updraft
means ___ air rises up.
2. In tornadoes and hurricanes, a downdraft
means ___ air descends.
3. A best place to seek shelter from a
tornado is going to a room w ___.
4. A best place to seek shelter from a tornado is
staying in a place that is made of ___.
5. A best place to seek shelter from a
hurricane is to move to a ___.
6-7. Give two pieces of info about this cyclone.
8. If hurricane winds end up on land, we can
call it a ___.
9. In the activity, I saw clouds when I ___
the bottle.
10. Therefore, cloud formation could be
due to a ___ system.
Test questions #2
Circle the diagram (Left or Right) that
you are answering.
Left
Right
• 1. Earth is a spherical
shape.
• We know this because
the Sun moves in an arc
and there are images
from spacecraft
Question #3