this ppt is mainly for the students of grade 7 igcse go ahead,have a look! follow for more ppts! just comment whichever ppt you want next and it will be ready for u! -proud dsrvian

1. STRATOSPHERE
THE SECOND LAYER OF THE EARTH’S
ATMOSPHERE!!

2. INDEX…
PICTURE PICTURE INTRODUCTION
MORE INFORMATION PICTURE DIAGRAM
LEARN EXTRA DISCOVERY
WORDPOOL

5. So what is Stratosphere??
The stratosphere is the second major layer of Earth’s
atmosphere just above the troposphere and below
the mesosphere .It is stratified in temperature, with
warmer layers higher up and cooler layers farther
down.
At moderate latitudes the stratosphere is
situated between about 10–13 km and 50 km
altitude above the surface, while at the poles it
starts at about 8 km altitude, and near the
equator it may start at altitudes as high as 18 km.

6. Let’s know more information on the
Stratosphere!!
Within this layer, temperature increases as altitude
increases. The top of the stratosphere has a
temperature of about −3°C just slightly below the
freezing point of water.
Methane ,while not a direct cause of ozone
destruction in the stratosphere, does lead to the
formation of compounds that destroy ozone.

7. Let’s see a picture of Stratosphere!!

8. LET’S SEE A DIAGRAM OF THE
STRATOSPHERE…

9. LET’S LEARN MORE…
Life
ῳ Bacterial life survives in the stratosphere, making it a
part of the biosphere. In 2001 an Indian experiment,
involving a high-altitude balloon, was carried out at a
height of 41 kilometres and a sample of dust was
collected with bacterial material inside.Also, some
bird species have been reported to fly at the lower
levels of the stratosphere. On November 29, 1973, a
Rüppell's vulture was ingested into a jet engine
11,552 m above the Ivory Coast, and bar-headed
geese reportedly overfly Mount Everest's summit,
which is 8,848 m.

10. DISCOVERY OF STRATOSPHERE…
€ Léon Teisserenc de Bort and Richard
Assmann, in separate publications and
following years of observations, announced
the discovery of an isothermal layer at
around 11–14 km, which is the base of the
lower stratosphere. This was based on
temperature profiles from unmanned
instrumented balloons.

11. WORDPOOL…
• Exponentially-becoming more rapid.
• Stratified-formed or arranged into
layers.
• Ingested-put into.