9/10/13 11th Day of School Learning Goal (7.E.1.1): I will be able to describe the composition of Earth’s atmosphere (what it’s made of) Due Today: pocket folder Evening Assignment: Work on atmosphere composition slides of Powerpoint

Do Now In your composition notebook, copy and answer the following… What is Earth’s atmosphere made of? McDougall textbook, p. viii

Do Now Did you get it right? What is Earth’s atmosphere made of? Gases (air) Particulates Energy (ex. Heat, radiation, etc)

Defining key words What is the atmosphere? Look up and write down the definition for atmosphere from two different sources. Textbook: Science dictionary: Webster’s dictionary: Computer dictionary: Online: McDougall textbook, p. A11

Defining key words What is the atmosphere? Envelope of gases surrounding Earth Layer of gases that surrounds Earth Mixture of gases that surround Earth McDougall textbook, p. A11

Composition of Earth’s Atmosphere Most of the materials in Earth’s atmosphere are gases 78% Nitrogen 21% Oxygen 1% (Argon, CO 2, and other gases) Up to 4% water vapor Essential for life McDougall textbook, p. A11

Composition of Earth’s Atmosphere Most of the materials in Earth’s atmosphere are gases 78% Nitrogen 21% Oxygen 1% (Argon, CO 2, and other gases) Up to 4% water vapor Essential for life It also contains solid & liquid particles (particulates) Dust Sea salt Fungal Spores Viruses & bacteria Pollen Water droplets

The Composition makes life on Earth Possible. 1. Living things use gases in the air: oxygen, nitrogen, argon, carbon dioxide, & water vapor 2. The atmosphere keeps Earth warm. Transports energy to different regions of the planet (radiation, conduction & convection). 3. The atmosphere protects & supports life. 4. Supplies materials that your body uses.

Major 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 Slide(s) about the properties of Earth’s atmosphere Slide(s) about the structure of Earth’s atmosphere

Evening Assignment Work on Title, atmosphere definition, and Earth’s atmosphere composition slides.