17.1 – Atmospheric Structure and Temperature – Part I This template can be used as a starter file for presenting training materials in a group setting. Sections Right-click on a slide to add sections. Sections can help to organize your slides or facilitate collaboration between multiple authors. Notes Use the Notes section for delivery notes or to provide additional details for the audience. View these notes in Presentation View during your presentation. Keep in mind the font size (important for accessibility, visibility, videotaping, and online production) Coordinated colors Pay particular attention to the graphs, charts, and text boxes. Consider that attendees will print in black and white or grayscale. Run a test print to make sure your colors work when printed in pure black and white and grayscale. Graphics, tables, and graphs Keep it simple: If possible, use consistent, non-distracting styles and colors. Label all graphs and tables.

Do Now What is the most abundant gas in clean, dry air? Give a brief overview of the presentation. Describe the major focus of the presentation and why it is important. Introduce each of the major topics. To provide a road map for the audience, you can repeat this Overview slide throughout the presentation, highlighting the particular topic you will discuss next.

Do Now What is the most abundant gas in clean, dry air? Nitrogen Give a brief overview of the presentation. Describe the major focus of the presentation and why it is important. Introduce each of the major topics. To provide a road map for the audience, you can repeat this Overview slide throughout the presentation, highlighting the particular topic you will discuss next.

Key Words Atmosphere Weather Climate Components Variable

Vocab Words Ozone Troposphere Stratosphere Mesosphere Thermosphere

Composition of the Atmosphere Weather is constantly changing, and it refers to the state of the atmosphere at any given time and place. Climate, however, is based on observations of weather that have been collected over many years. Climate helps describe a place or region. Give a brief overview of the presentation. Describe the major focus of the presentation and why it is important. Introduce each of the major topics. To provide a road map for the audience, you can repeat this Overview slide throughout the presentation, highlighting the particular topic you will discuss next.

Composition of the Atmosphere Major Components Air is a mixture of different gases and particles, each with its own physical properties. Variable Components Water vapor is the source of all clouds and precipitation. Like carbon dioxide, water vapor absorbs heat given off by Earth. It also absorbs some solar energy. Ozone is a form of oxygen that combines three oxygen atoms into each molecule (O3). If ozone did not filter most UV radiation and all of the sun’s UV rays reached the surface of Earth, our planet would be uninhabitable for many living organisms. Give a brief overview of the presentation. Describe the major focus of the presentation and why it is important. Introduce each of the major topics. To provide a road map for the audience, you can repeat this Overview slide throughout the presentation, highlighting the particular topic you will discuss next.

Use a section header for each of the topics, so there is a clear transition to the audience.

Human Influence 1 2 3 Transportation – 46% Emissions from transportation vehicles account for nearly half the primary pollutants by weight. Transportation – 46% 1 Stationary Source Fuel Combustion – 27% 2 Industrial Processes – 15% 3 This is another option for an Overview slide.

Use a section header for each of the topics, so there is a clear transition to the audience.

Heat and Structure of the Atmosphere The atmosphere rapidly thins as you travel away from Earth until there are too few gas molecules to detect. Pressure Changes Atmospheric pressure is simply the weight of the air above. What will the audience be able to do after this training is complete? Briefly describe each objective how the audience will benefit from this presentation.

Temperature Changes The atmosphere can be divided vertically into four layers based on temperature. The troposphere is the bottom layer of the atmosphere where temperature decreases with an increase in altitude. The stratosphere is the layer of the atmosphere where temperature remains constant to a height of about 20 kilometers. It then begins a gradual increase until the stratopause. The mesosphere is the layer of the atmosphere immediately above the stratosphere and is characterized by decreasing temperatures with height. The thermosphere is the region of the atmosphere immediately above the mesosphere and is characterized by increasing temperatures due to the absorption of very short-wave solar energy by oxygen.

Use a section header for each of the topics, so there is a clear transition to the audience.

Group Challenge Question What would happen, specifically, if the ozone was gone? How is ozone depletion different from global warming? Use a section header for each of the topics, so there is a clear transition to the audience.