What made the oxygen in our
atmosphere?
Bacteria
What evidence tells us what the early
atmosphere was like?
O-free minerals/rock followed by
O-rich minerals/rocks
Amino Acids could not form in an
oxygen environment
What element makes up ozone?
Oxygen O3
What had to form before land life
could form on Earth?
Ozone
What process makes oxygen?
Photosynthesis
What are the two major gases in
the present atmosphere?
N= 78%; O=21%
Where is most of the air located on
the planet? Why?
Ground level, due to gravity
C6H12O6 + O2 → CO2 + H2O + Energy
1. What are the reactants?
2. What are the products?
Gluose & Oxygen
CO2/H2O, & Energy
3. What is the purpose for this To make energy
process? What is/are the waste
products? CO2/H2O
6 CO2+ 6 H2O + Sun --> C6H12O6 + 6 O2
1. What is this process? Photosynthesis
and
2. What are the products? Glucose
Oxygen
3. What are the waste products?
Oxygen
4. What is the purpose for this
process? To make glucose
What is a carbon sink?
Any place which can store
carbon, such as atmosphere,
oceans, rocks, soil, living
organisms
What is the connection between
altitude and air pressure?
As altitude rises, air
pressure decreases
What determines how air moves?
High and Low pressure
systems; air moves from H to L
pressure
How does temperature change with
altitude?
Temp. decrease w/ alt. in the
troposphere, rises in the
stratosphere due to ozone, drops
in the mesosphere because of no
ozone, and rises in the
thermosphere. Temps. level off at
the pauses.
In what part of the atmosphere do you
find the Exosphere and ionosphere?
Thermosphere
What do humans do to destroy the
ozone?
Create chlorofluorocarbons
(CFCs)
Explain how ozone is destroyed.
CFC, takes an O atom from O3;
The ClO mole. Is broken by a
free O atom to make an O2 mole
and frees up a Cl atom to break
another O3 mole.
UV radiation
What are the three ways energy
moves in the atmosphere and
which if these ways is the primary
way?
Conduction, Radiation, and ConvectionsConvection is the primary way to move
energy.
What happens to the Sun’s energy as
it enters Earth’s atmosphere?
It is reflected by clouds and
surface, absorbed by the soil,
water, clouds, and eventually
radiates back as long wave
radiation
Does all of the Sun’s energy leave the
planet? Explain.
Most leaves, but some stays due to
the Greenhouse Effect and keeps the
planet warm
1. What is the pressure at approximately
20 km above the surface?
~ 50 mb
2. What is the altitude if the pressure is
200 mb?
~12 km
1. What is the coldest part of the atmosphere?
Mesopause
2. What happens to temperature in the
Troposphere as elevation increases?
Temperatures Drop
3. What are the regions where the
temperatures reverse themselves?
Pauses
Explain the Carbon/O cycle
CO2 is taken in by plants for
photosyn. to make food and
release O2. The O2 is taken in by
animals for cell. resp. and CO2 is
released as a waste.
Explain the Nitrogen Cycle
Free N2 is taken in by N-fixing bact. And
turned into N- compounds. Those Ncomp. are used by plants, eaten by
animals which then release n-comp. as
they produce waste, die and decay.
Bact. turn these comp. back into N2.