1. The Carbon Cycle…
life
and
Earth’s atmosphere
Carbon is an ________________
atomic # _______
means _____________________
valence electrons ________
it is referred to as the element of life….. link
where’d the carbon on Earth come from?... link
and now that it is here on Earth….
element 6
each atom of C has 6 protons 4

2. the element carbon is involved in two key processes related to life….
Organisms in which photosynthesis occurs
Organisms that undergo cellular respiration
Organelle that this process occurs in…

3. What do you know about photosynthesis & cellular respiration?

4. Photosynthesis occurs in what organisms?
plants
and
some
bacteria (protists)
sunlight
Photosynthesis requires ___________________
( __________________
___________________ )
to produce
____________________
light
energy in the form of
e/m radiation
carbohydrates

5. all living things… Cellular Respiration occurs in what organisms?
requires _________________
to ______________________ _______________________
all living things…
carbohydrates
provide energy

6. What is an organelle? link
What organelle is responsible for Photosynthesis?
_______________
What organelle is responsible for
Cellular Respiration?
___________________
chloroplasts
mitochondria

7. to better understand photosynthesis, cellular respiration,
the carbon cycle,
and their relationship to the atmosphere….
(remember we are in the atmosphere unit)
we need to better understand chemical changes
and how they are represented
chemical change __________________________________________
_________________________________________________
(physical change ____________________________________
_________________________________________________ )
a chemical change is represented by a chemical equation
a change in which one or more substance(s) are
converted into one or more new substance(s)
at the atomic scale, bonds between atoms are broken,
and new bonds form
a change in which no new substances form
ex: change in temperature, change in state…

8. H2 + O2  H2O reactants products
chemical change __________________________________________
_________________________________________________
a chemical change is represented by a chemical equation
a change in which one or more substance(s) are
converted into one or more new substance(s)
at the atomic scale, bonds between atoms are broken,
and new bonds form
H O2  H2O
turn
into
reactants
products

9. photosynthesis: respiration:
The chemistry of photosynthesis and respiration…
photosynthesis:
reactants (______________________):
___________________ ______________
products (_________________________):
_____________________ ____________
respiration:
___________________ _____________
___________________ _____________
Represent how the reaction for photosynthesis
is related to the reaction for respiration
the stuff you start with
carbon dioxide CO2
water H2O
the new stuff you end with
glucose C6H12O6
oxygen O2
the stuff you start with
aerobic cellular respiration
glucose C6H12O6
oxygen O2
the new stuff you end with
carbon dioxide CO2
water H2O

10. before we further consider the chemistry of photosynthesis and respiration….
we’ll take a detour…..
Think back to the lemonade making activity.
What is the Law of Conservation of Matter ?
given this law is true…
what is incorrectly represented in the chemical equation below ?
H O2  H2O

11. given this law is true…
what is incorrectly represented in the chemical equation below ?
H O2  H2O
called ___________________________________________
unbalanced
How would we fix this “problem”?
called ___________________________________________
balancing the chemical equaiton
need to have enough molecules of each substance such that
the number of atoms of each element in the reactants
equals
the number of atoms of each element in the products

12. PRACTICE need to have enough molecules of each substance such that
the number of atoms of each element in the reactants
equals
the number of atoms of each element in the products
H O  H2O
PRACTICE

13. (general) Chemical Equation for Photosynthesis!
(general) Chemical Equation for (aerobic) Cellular Respiration!

14. (general) Chemical Equation for Photosynthesis!
(general) Chemical Equation for (aerobic) Cellular Respiration!

15. Photosynthesis: purpose _____________________________________________
to provide food for energy to “do”, and for “stuff” to build
Balanced Chemical Equation
Connection to Atmosphere
(gases consumed and produced)
Where the reaction takes place
Energy in / out
From / to ….
consumed:
produced:
carbon dioxide,
CO2
in the
chloroplasts
in cells
6 CO H2O
 C6H12O O2
energy in
from the Sun
oxygen, O2
aerobic
Cellular Respiration: purpose __________________________________________
to provide energy to “do”
Balanced Chemical Equation
Connection to Atmosphere
(gases consumed and produced)
Where the reaction takes place
Energy in / out
From / to ….
consumed:
produced:
oxygen, O2
C6H12O O2
 6 CO H2O
in the
mitochondria
in cells
energy out
stored in ATP
carbon dioxide,
CO2

16. Now that you have an understanding of
the chemical changes for photosynthesis and aerobic cellular respiration,
where they take place,
how they are connected, and the gases involved,
create a diagram that shows:
- organelle where the reactions take place
- the reactions
- the relationship between the chemical reactions
- the energy source and/or where energy is stored for each reaction
- the gases involved and the connection to the atmosphere

17. Investigate Carbon Cycling in an Aquatic Plant
Lab:
Investigate Carbon Cycling in an Aquatic Plant
before we do the lab…
review some lab terminology OR
set up lab,
then review terminology
instructions
experimental methods (pg 2)
fill in initial observations (pg 3)
go back to page 1 and begin answering questions

18. definitions first then examples
before we do the lab…
review some lab terminology
Let’s say we want to test the effectiveness of different soaps/sanitizers
on bacterial growth…
variable ________________________________________
there are two types of variables:
independent ______________________________
__________________________________
dependent ______________________________
constant ________________________________________
definitions first then examples

19. Let’s say we want to test the effectiveness of different soaps/sanitizers
on bacterial growth…
variable ________________________________________
there are two types of variables that are meant to change:
independent ______________________________
__________________________________
dependent ______________________________
constant ________________________________________
control __________________________________________
anything that potentially changes in an experiment.
the variable that is intentionally varied
by the experimenter…. the cause
the variable that the experimenter
measures the response of… .the effect
any variable that is held the same in an experiment to make
sure that only the Independent Variable is being changed
sample(s) to which the independent variable is not applied…
(… or applied at a reference level)
where the independent variable being tested cannot influence
the results (the effects on the dependent variable)

20. before we do the lab…
review some lab terminology
Let’s say we want to test the effectiveness of different soaps/sanitizers
on bacterial growth…
variable ________________________________________
there are two types of variables:
independent ______________________________
__________________________________
dependent ______________________________
constant ________________________________________

21. C6H12O6 6 H2O + + 6 O2 6 CO2 taken in from atmosphere by
photosynthesis
released into
atmosphere by
photosynthesis
released into
atmosphere by
aerobic cellular
respiration
taken in from
atmosphere by
respiration
energy stored
in ATP….