Greek word atmos “vapor” and sphaira “sphere” The atmosphere is the layer of gas that surrounds Earth. 

2. may either be marine water or freshwater
Water found
beneath Earth’s
surface

4. Greek word atmos “vapor” and
sphaira “sphere”
The atmosphere is the layer of
gas that surrounds Earth.

7. This layer is the
closest to the Earth’s
surface.
Tropos
“change”
It is the layer
we live in.
The troposphere is
where all the weather
occurs.

8. Tropopause
 the boundary
between troposphere
and stratosphere.

9. Many jet aircraft fly in the
stratosphere because it is
very stable.
Extends to
about 50 km
from the
Earth’s surface.
we find the
ozone layer.
Stratos
“layer”

10. 50-55 km above the
Earth’s surface.
Boundary between
stratosphere and
mesosphere

11. Meteors or
rock fragments
burn up in the
mesosphere.
Meteors or
rock fragments
burn up in the
mesosphere.
Meso
means
“middle”

12. Boundary between
mesosphere and
thermosphere.
Mesopause

13. This layer lies
between 80 km
and 110 km
above the
Earth.
Thermo-
“heat”
Space shuttles fly
in this area and it is
also where the
auroras are found.

15. Exo-
“outside” or
“beyond”
This layer of
the atmosphere
merges into
space.
Satellites
are stationed
here.
16,000-28,
500 km from
the Earth’s
surface.

19.  Life began from nonliving matter such as
simple organic compounds.
 Contained chemicals such as methane, water,
ammonia, and hydrogen gas that accumulate
in a “soup” at certain areas viable for energy
transformation.

20. Life began not on the surface
of Earth but deep down in the
sea in areas known as marine
hydrothermal vents.

21. Life on Earth began
somewhere in the
universe.

22. How unique is Earth
compared with other
planets in the solar
system? Explain how
the subsystems work
in relation to how life
was formed.