1. Lesson Agenda – 9/14 Warm-up Introduction to ESRT 14
Practice with ESRT 14
Reflection

2. Warm-up
According to the Earth Science Reference Tables answer the following:
Which is the most abundant element in the crust
Which is the least abundant element in the hydrosphere
What elements are the troposphere made up of?
Bonus: Why do you think there is so much Oxygen and Hydrogen in the hydrosphere?

3. ESRT p. 14 – Layers of the Atmosphere

4. Layers
Troposphere - earth's surface to a height of about 3.7–6.2 miles (6–10 km)
Stratosphere – extends to 32 miles (50 km) above the earth's surface 
Mesosphere - about 30 and 50 miles (50 and 80 km) in altitude
Thermosphere - the region of the atmosphere above the mesosphere and below the end of the atmosphere

5. Layers Picture

6. Practice

7. Exit Ticket
Using your ESRT and page 14, describe the distances of each layer of the atmosphere above earth. Draw a diagram to show these distances.