Students are introduced to air masses, with an emphasis on the differences between and characteristics of high- versus low-pressure air systems. Students also hear about weather forecasting instrumentation and how engineers work to improve these instruments for atmospheric measurements on Earth and in space.

This lab exercise provides students with activities utilizing vector operations within the context of the atmospheric and oceanic environments.

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This activity is a hands-on investigation that teaches students that air resitance affects how things move and that pressure from compressed air can move things.

Students investigate the weather from a systems approach, learning how individual parts of a system work together to create a final product. Students learn how a barometer works to measure the Earth's air pressure by building a model using simple materials. Students analyze the changes in barometer measurements over time and compare those to actual weather conditions. They learn how to use a barometer to understand air pressure and predict actual weather changes.

This lesson introduces students to the concept of air pressure. Students will explore how air pressure creates force on an object. They will study the relationship between air pressure and the velocity of moving air.

Learn about cloud formations over the Sierra Nevada Mountains in this video from Nature.

This is a lab activity where students observe the relationship between pressure and volume. They use their data to determine the formula for Boyle's Law.

This activity includes reading a non-ficiton book and trying the experiments with air listed in the book. Students will record their observations regarding the experiments in an observation journal.

This lesson introduces the ways that engineers study and harness the wind. Students will learn about the different kinds of winds and how to measure wind direction. In addition, students will learn how air pressure creates winds and how engineers build and test wind turbines to harness energy from wind.

This activity is a hands on lesson where students will explore high and low air pressure.

This homework assignment is given in the first two weeks of class. Students receive one or two lectures that cover the topics of atmospheric layers, temperature and pressure profiles, concepts of atmospheric mass and pressure and measuring (i.e. dropsonde) instrumentation. At the beginning of each lecture I briefly show them the tropical update from the NOAA National Hurricane Center web site; if there is an active storm, I show where I go to get more info, such as the projected storm track and storm history (for example, from Intellicast Hurricane Tracking). Then, for this assignment, I reintroduce them to these hurricane information web sites and demonstrate how to find the historical data on tropical storms (such as from the Unisys Hurricane Data Archive), and how to copy and paste text data into word and/or excel, as a tab- or space-delimited file. I point out some problem areas with this data-grabbing method, such as headers that get lost from their associated data column or date information that may not format as dates.
I then hand out the assignment, which asks them to:

Find data on a current or recent (this year) tropical system, provide the name and year of the storm and the reference web site, and plot the wind speed and pressure variables against time. Students should label the axes and give a descriptive title to the chart.
Describe what they notice in the graphed data and if it seems believable (this allows students to decide if they have done the task correctly by using their understanding of the data).
Predict what will happen if the storm a) intensifies or b) weakens.
I then provide another data set (of any long-duration tropical storm that formed, weakened and later re-intensified) and ask them to go through the same process of plotting and interpretation.
I tell them that some future climate predictions are for more storms with lower central pressures and ask which of the two charts best represents that future scenario, and why.

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ZOOM guest Amy wants to be a meteorologist and volunteers at a weather observatory. In this adapted video segment, she shows us instruments used to predict the weather and describes how air pressure affects weather patterns.

Students graph the relationship between air pressure and wind speed in 2005's Hurricane Katrina and for the entire 2005 hurricane season. From their analyses, they come up with an estimate of the minimum air pressure that is likely to result in hurricane-force winds of 65 knots or higher.

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Students use latex tubes and bicycle pumps to conduct experiments to gather data about the relationship between latex strength and air pressure. Then they use this data to extrapolate latex strength to the size of latex tubing that would be needed in modern passenger sedans to serve as hybrid vehicle accelerators, thus answering the engineering design challenge question posed in the first lesson of this unit. Students input data into Excel spreadsheets and generate best fit lines by the selection of two data points from their experimental research data. They discuss the y-intercept and slope as it pertains to the mathematical model they generated. Students use the slope of the line to interpret the data collected. Then they extrapolate with this information to predict the latex dimensions that would be required for a full-size hydraulic accumulator installed in a passenger vehicle.

This activity is a mini-lab where students determine relationships between gas laws and temperature, pressure, and volume; particularly Charles and Boyle's Law. The concept of mini-labs originated from Dr. Dan Branan and Dr. Matt Morgan. See mini-labs.org for more details.

Helps students develop the idea of air pressure. How high pressure and low pressure affect the development of weather. This lesson explains the ways in which air moves, from a lot to a little, and the effects movement of air can have. 

The assignment requires students to observe the weather map in the newspaper for four consecutive days. On the first day they are instructed to choose a location somewhere in the country. The will record the weather conditions there and observe any weather systems that exist elsewhere in the country. They then make predictions of how they expect weather in their location to change over the subsequent three days.

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This video segment from Nature takes viewers to a road race in Death Valley.

Students learn about tornadoes - their basic characteristics, damage and occurrence. Students are introduced to the ways that engineers consider strong winds, specifically tornadoes, in their design of structures. Also, students learn how tornadoes are rated, and learn some basics of tornado safety.

Part 1

The SAGUARO Exploring GIS Investigations for Earth Science curriculum requries the use of ESRI's ArcView GIS software version 3.0 for Macintosh or 3.2 and higher for PC.
Use ArcGIS and data files from the SAGUARO Project's (http://pro.arcgis.com/en/pro-app/help/projects/supported-data-types-and-items.htm) Exploring Tropical Cyclones investigations. After the students are introduced to the program they are asked to determine what criteria are required for the formation of tropical cyclones.
Exploring Tropical Cyclones Unit 1 has a great deal of data for the students to use. The data is presented as layers on a world map. Different features can be turned on and off at will, and layers can be brought in from other units if desired.

Features they can work with are:

August SST
February SST
tropical cyclone tracks
locations of tropical cyclone formation for Jun-Sep
locations of tropical cyclone formation for Dec-Mar

Part 2

Students are divided into small groups (3-4 students works well) where they compare their findings (including what evidence they used) with the findings of the other group members. Each group is then asked to determine the threshold temperature for tropical cyclone formation as well as to calculate the area of the ocean that has SST equal to or above this threshold temperature (you can have them calculate this for each season, or as a total area including both February and August data).

Part 3

Class discussion of what they have found so far. Introduce them to model predictions of SST for different atmospheric CO2 levels. Propose a 2 degree C increase in tropical SST and ask what they think that will mean. What other factors might influence the formation of tropical cyclones?

Part 4

Assign an article or two (ideally a published peer reviewed article - to introduce them to this type of scientific writing - that is if you can find one that you consider appropriate for your students) that introduces them to other factors required for tropical cyclone formation and predictions of how climate change might affect them. For example an article that discusses the role of wind speed near the surface of the ocean, or vertical wind shear, or one that shows that the threshold temperature is actually predicted to increase by the same magnitude as the SST increase.
Have them write a report that summaries the criteria for cyclogenesis as well as explaining how they would go about predicting where tropical cyclones will form as a result of an increased SST. They do not need to perform all of the tests they propose! They should state what sort of information they would like to obtain and why.

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