1. “The Atmosphere”
17.1

2. What is Atmosphere? Atm = “Ocean of Air” Weather = Atm at a time
Climate = Atm over time
= Atm of a place

3. Composition of Atmosphere
Gases & Particles around our planet.
“Air” = Many Gases
Nitrogen & O2 (99%)
CO2 (important!)

4. Water Vapor (H2O) Ozone (O3) All Clouds & Precipitation
3 Oxygen Molecules
Protects us from UV rays!

5. Atm. = 4 Layers Thermosphere Mesosphere Stratosphere Troposphere
Based on tempo
Thermosphere
Mesosphere
Stratosphere
Troposphere

6. As you go UP↑… Pressure ↓ “Thinner Air” Temp? Varies. Colder…
Then hotter!
Then Colder?!
Varies.

7. Earth Motion R_______ R________ OTATION Spinning on axis Days
Going around
Seasons
OTATION
EVOLUTION

8. Uneven Solar Energy Solar Energy is not distributed evenly over Earth!
Light waves hit surface at different angles!
Earth heats unevenly!

10. Solstice & Equinox