The document summarizes the five layers of Earth's atmosphere. It describes that the atmosphere extends from Earth's surface to hundreds of kilometers above and is composed primarily of nitrogen, oxygen, and trace amounts of other gases. It then outlines the characteristics of each atmospheric layer - the troposphere, stratosphere, mesosphere, thermosphere, and exosphere - including their distances from Earth's surface and key features.

1. Unit 10:
Atmosphere Layers

2. I. Atmosphere or “air”
thin layer of gases
that surrounds Earth.
Extends from surface
to hundreds of km
above surface.

3. A. 78% N, 21% O2
qremaining 1% CO2,
He, Ne, Ar, H2O
vapor, & others.

4. B. Protects us from
UV
C. Helps keep Earth
warm

5. II. The Five Layers

6. A. Troposphere
qextends from
Earth’s surface to
about 10 km (6 mi.)
above surface

7. 1. it’s the air we
breathe
2. most
weather
occurs here

8. B. Stratosphere
qextends from 10
km to 45 km (28 mi)
above Earth

9. 1. very thin air
2. not as turbulent
as troposphere

10. 3. planes fly in lower
part of stratosphere
4. contains the
ozone layer

11. C. Mesosphere 45-80km
D.Thermosphere
80-500km

12. E. Exosphere 500km on
qgases get thinner
and thinner

13. q Biosphere - The layer around the
Earth in which life occurs naturally,
extending to about 8km above the
Earth to the deepest part of the
ocean, which is 8 km deep