1. 9/12/13 13th Day of School Learning Goal (7.E.1.1): I will be able to describe the structure of Earth’s atmosphere. Due Today: Title, composition, & properties Powerpoint slides Evening Assignment: Work on atmosphere structure slide(s) of Powerpoint

2. Do Now In your composition notebook, copy and answer the following… Give two examples of each: -Earth’s atmosphere composition -Earth’s atmosphere properties McDougall textbook, p. viii

3. Do Now How’d you do? -Earth’s atmosphere composition -Mostly gases (ex. Nitrogen and Oxygen -Particulates (ex. Dust, clouds) -Energy (ex. Heat energy, UV radiation -Earth’s atmosphere properties -Air temperature decreases as altitude increases -Air pressure decreases as altitude increases -Air density decreases as altitude increases

4. Earth’s Atmosphere Structure: Temperature Layers Each layer has a different… Name Altitude range Temperature range Air pressure & Air density Heat source Special features

5. Thermosphere Name means “heat” Altitude range: 56-600 miles Temperature range: -120F  to 3600F! Heat source: sun (from above) Special features: auroras, space shuttle Mesosphere Name means “middle” Altitude range: 31-56 miles Temperature range: 32F  to -120F Heat source: stratosphere (from below) Special features: meteors burn up Stratosphere Name means “spreading out” Altitude range: 6-31 miles Temperature range: -76F  to 32F Heat source: sun (from above) Special features: ozone layer blocks UV Troposphere Name means “turning” Altitude range: 0-6 miles Temperature range: 59F  to -76F Heat source: ground (from below) Special features: weather, life Source: McDougall p. A20-21 and

6. Minor Assessment Assignment: Earth’s Atmosphere Powerpoint You will make a Powerpoint presentation about Earth’s atmosphere. You may use information and pictures from class, the textbook, other books, and the Internet but you MUST cite your sources (ex. title, page, web address, etc). Include text in your own words explaining any images you use. Your Powerpoint should have the following slides. Final Powerpoint is due Friday 9/13/13. Title slide with title, your name, period, date Slide defining atmosphere Slide(s) about the composition of Earth’s atmosphere -Gases -Particulates -Energy Slide(s) about the properties of Earth’s atmosphere -Air has substance -Air temperature decreases as altitude increases -Air pressure decreases as altitude increases -Air density decreases as altitude increases -Protects & supports life Slide(s) about the structure of Earth’s atmosphere -Thermosphere -Mesosphere -Stratosphere -Troposphere

7. Minor Assessment Rubric

8. Evening Assignment Work on Title, atmosphere definition, Earth’s atmosphere’s composition, properties, and structure slides. Due by the end of class Friday.