This document discusses the layers of Earth's atmosphere. It identifies the five major layers from lowest to highest as the troposphere, stratosphere, mesosphere, thermosphere, and exosphere. Each layer is described in terms of its height, temperature, pressure, and the gases found within it. The troposphere contains most of the atmosphere's mass and weather. The stratosphere contains the ozone layer. The mesosphere is the coldest layer. The thermosphere contains ionized gases. The exosphere is the uppermost thin layer where molecules are collisionless.

1. Earth’s
Atmosphere

2. Hello
I am Chael Bern E. Llamis &
I am your Teacher for this lesson

3. OBJECTIVES:
Students will be able to:
1. Recognize the different layers of the
Earth's atmosphere.
2. Explain each layer of the
atmosphere's heights,temperatures,
and pressures.
3. Identify the gases that exist in each
of the atmosphere's layers.
4. Present information about one of the
layers of Earth’s atmosphere.

4. INTRODUCTION

5. LAYERS OF ATMOSPHERE
● Earth's atmosphere has five major
and several secondary layers.
● From lowest to highest, the major
layers are the troposphere,
stratosphere, mesosphere,
thermosphere and exosphere.

6. Troposphere
● The troposphere is the lowest layer
of Earth's atmosphere.
● Most of the mass of the atmosphere
is in the troposphere.
● Most types of clouds are found in the
troposphere, and almost all weather
occurs within this layer.

7. Stratosphere
● The stratosphere is the second layer
of the atmosphere as you go upward.
● The infamous ozone layer is found
within the stratosphere.
● Ozone molecules in this layer absorb
high-energy ultraviolet (UV) light
from the Sun, converting the UV
energy into heat.

8. Mesosphere
● The mesosphere is the third layer of
the atmosphere, directly above the
stratosphere and directly below the
thermosphere.
● Mesosphere extends from about 50
to 85 km above our planet.
● The mesosphere is the coldest layer
of the atmosphere which surrounds
the Earth.

9. Thermosphere
● The thermosphere is the layer in the
Earth's atmosphere directly above
the mesosphere and below the
exosphere.
● It extends from about 90 km to
between 500 and 1,000 km above our
planet.
● Within this layer of the atmosphere,
ultraviolet radiation causes
photoionization/photodissociation
of molecules, creating ions.

10. Exosphere
● The Exosphere is the uppermost region
of the Earth's atmosphere.
● The exosphere is a thin,
atmosphere-like volume surrounding a
planet or natural satellite where
molecules are gravitationally bound to
that body, but where the density is so
low that the molecules are essentially
collisionless.

11. ● The air in Earth's atmosphere is
made up of approximately 78
percent nitrogen and 21 percent
oxygen.
● Air also has small amounts of lots of
other gases, too, such as carbon
dioxide, neon, and hydrogen.
Composition of Air

12. What does the
temperature do in
each layer of the
atmosphere?

13. ● As the density of the gases in this layer decrease
with height, the air becomes thinner.
● Therefore, the temperature in the troposphere
also decreases with height in response.
● As one climbs higher, the temperature drops from
an average around 62°F to -60°F at the
tropopause.
Temperature variation in
different layers of atmosphere

14. Thankyou and
Have a Great Day
Students