Weather

Do Now

1. Weather refers to the state of the atmosphere at a specific ___ .2. Weather describes conditions such as air ___ , wind, ___ , and the amount of ___ in the air.

time and place

pressure temperaturemoisture

1. Relative humidity is high when temperature is low. Explain. 3 lines

2. High humidity is associated with: 3 lines

3. Low humidity occurs when it is 3 lines

If we hold water vapor constant than in the winter the air will hold less water vapor.

cool damp nights, heavy dew, a fog, condensation, or rain.

hot, dry, clear, sunny, windy and when evaporation is high.

4. Relative humidity= Amount of water vapor in the air x 100Max amt of water vapor it can hold

Do Now1. 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 lines2. 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: ___ , ___ ) to low pressure (density, temperature: ___ , ___).

more dense coldless 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 measures exposed to (dry) ___

2. The wet bulb temperature measures ___ in the air.

3. It is the lowest temperature that can be reached by the ___ of water only. (For example, it is the temperature you experience when your skin is wet as the air moves by you.)

air

humidity

evaporation

4. Relative humidity is the amount of ___ in the air compared to what the air can "hold" at that temperature. 5. When the air can not "hold" all the moisture, then it condenses as ___ .

moisture

dew

Do now1. High pressure systems are huge areas of stable air 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 does, it dries and ___ up.3. Weather is mostly dry and has ___ skies.

higher

clearwarms

2. High pressure system is an area of skip 3 lines

?. Air inside these pressure system falls and as it does, 3. Weather

stable air due to a nearby area that has higher air pressure.

is mostly dry and has clear skies.it dries and warms up.

Do Now1. When warm air ___ from the Earth’s surface, the area becomes unstable. 2. A ___ pressure system is created by an area of warm air meets with cold air and pushes the cold air back forming a cold front behind it.3. So you get a ___ 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 ___ front.

rises

low

warm

cold

3. So you get a ___ 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 ___ front.

warm

cold

Four Types of Air MassesPolar= cold air mass away from the equatorTropical= warm air mass close to the equatorMaritime= moist air mass originate from the oceanContinental= dry air mass over land

Describe the climate by combining two air masses together:a. Mojave Desert- b. Antarctica-c. Key West, Florida-d. 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 Now1. 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. No clouds, 40 knots (44mph), wind coming from NE into a high pressure system.

4. 25% cloud coverage at NE, 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 line2. ___ rises and reaches the cold air above. 2 word answer3. The cold air chills the rising air to where the dew point (at which ___. Skip 1 line4. The water vapor in the air ___ skip 1 line5. An increase in relative humidity (amount of moisture the air currently holds) means that air ___ .

1. Clouds are made up of ___

2. ___ rises and reaches the cold air above. 3. The cold air chills the rising air to where the dew point (at which ___

tiny water droplets or tiny ice crystals

Hot air

water vapor in the air converts to water droplets) is reached.

4. The water vapor in the air ___ 5. An increase in relative humidity (amount of moisture the air currently holds) means that air ___.

condenses and forms clouds.

at higher temperatures, holds more moisture.

Clear or cloudylow or highHot or cold

Top or bottom

Notes to accompany handout. Write the height and the red descriptions.

thunderstormsfeathery

Nice weather

gray, rain

Long, flatFluffy, white

Do Now

1. CLOUD FORMATION: pressure= temp= water in the air= air molecules

condenseform as 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”.

tornadodowndraft. Sinking cold air causes warm, moist air near the ocean's surface to rise, and when the air reaches higher altitudes, the moisture

Do Now1. Winds at two different altitudes blow at two different speeds creating wind shear. What is a wind shear? Skip 2 lines2. 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 lines3. 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 NowExplain 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 a clouds forms 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 Now1. 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 Activity1. 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.

MATERIALS skip 5 lines

HYPOTHESISIfthenbecause…

DATASeparate paper

if a hurricane starts in a certain areathen it will end up in a different areabecause we need to know where it is going to hit

if a hurricane forms then it will land somewhere elsebecause we need to know how to be prepared.

if a hurricane has a distancethen we will know where its coming frombecause we need to be warned.

Step 3- graph table 2

Step 2- your prediction

Step 1- graph table 1

Do NowHurricane Andrew Video1. Why is Florida more susceptible to hurricanes? 3 lines2. What was the cause of the rotating updraft? 4 lines3. Was the wind speed of Hurricane Andrew more than 175 mph? Explain. 2 lines4. What do you think? Can hurricanes be a creation of global warming?

Hurricane Andrew Video1. 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 Video-2. 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 Video-3. 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 REVIEW1. Tropical, maritime 9. temperature2. polar, continental 10. no clouds3. 30 knots 11. wind coming from NE4. 40 knots 12. wind coming from S5. 25% clouds 13. warm front6. high humidity 14. moving to NE7. low humidity 15. high pressure system8. purple 16. low pressure system

Review game

1. ___ is associated with cool damp nights, heavy fog, etc2. ___ is associated with hot, dry, clear air.

3. Relative humidity is high when ___ is low

explanation winter: summer:Water vapor in the air 25% 25%Amt of vapor 75% 50%it can hold

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.

6. At a ___ system, weather can be from clear skies to winds and snow.

Explanation: in Gizmo, we saw that cold air can no longer hold water vapor

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.

Low pressure system has warm front moving to NE which means warm air is at SW and cold air is at NE.

8e. Cloud coverage?8f. Wind speed?8g. Wind direction?8h.Pressure system?8i.Front?8j. Front direction?

Word bank 21. higher ground 6. Indian Ocean2. no windows 7. southern hemisphere3. tornado 8. low pressure4. warm, moist 9. brick5. cool, dry 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 #2Circle the diagram (Left or Right) that you are answering.

Question #3