Warm up:
• With your “new” table partner
• Try to balance the equation:
• __H2O + __CO2  __ C6H12O6 + __O2
• Remember: You can only change where the __ is.
• Responsibilities: Due by 11:59???
ATP
• The basic unit of useable energy that cells need
to power their lives is known as ATP. ATP stands
for: Adenosine Tri-phosphate.
• ATP is “the money” of the cell. Mitochondria is
responsible for using this.
• It is the bonds that hold the Adenosine, Ribose
(sugar) and Phosphate groups together that hold
the energy. When the molecule is broken apart
by cells, this energy is released and used.
• ATP – Adenosine Tri-phosphate
• ATP = raw energy.
Photosynthesis
• Photosynthesis is an ‘energy storing’ process.
Performed by plants (and some bacteria), it
harnesses the energy available in sunlight for the
purpose of building glucose, a basic sugar
molecule organisms use as food. The term comes
from the two latin roots ‘photo’ always meaning
light, and ‘synthesis’ which means to build.
• The essential factor plants have that animals do
not, allowing them to perform this function, is
the pigment chlorophyll.
PSN
• Uses Sunlight to make “glucose”
• The essential chemical reaction for life.
• Happens in chlorophyll
PSN Where is it happening?
• Chlorophyll acts like an energy trap, or a rechargeable battery. It collects the energy
available from sunlight and then uses that to
begin the chemical process that forms
glucose.
• Collects Energy
2 Phases of Photosynthesis
• Light Reactions:.
• Water is split into oxygen and hydrogen.
• The oxygen is given off as a waste product, the
hydrogen is used by the plant.
• Keep the H
• Release the O
Stronger, clearer
• Use you notes and diagram to write a
summary of the light dependent reaction.
• Go meet up with another person. Each
person will share their summary while the
other takes notes.
Steps of light reaction
1. Happens in thylakoid inside a cholorplast.
2. Accept a photon (light).
3. Split water
– Use H to make NADPH and ATP
– Lose O as O2
Steps of the Dark Reactions
1. Carbon dioxide is fixed by RDP (chloroplasts
contain ribulose diphosphate or RDP. This is a
5-carbon sugar molecule with two phosphate
groups. This is a carbon dioxide receptor.
2. PGA combines with hydrogen and forms
PGAL.
3. Glucose is formed.
Steps of dark reaction
1. Inside the stroma (chloroplast goo)
2. Use energy to make sugar in the calvin (dark)
cycle.
3. ATP and NADPH are changed to ADP and
NADP+ and go back to the light reaction
where they are used again.
• https://www.youtube.com/watch?v=mYbMP
wmwx88
Want a headache from a nice person?
• https://www.youtube.com/watch?v=FfLLHQD
gpjI
MAJOR IDEA!!!!
• Photosynthesis is the bridge between the
organic (living) and inorganic (nonliving)world! This is the process in which nonliving building blocks are organized into a
carbon based substance that then powers life.
The Screaming Gummy
My only regret is that I have but one
life to give to CODALAND!
Materials:
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one 25x150 mm Pyrex test tube
one ring stand with clamp for test tube
5 grams potassium chlorate
Bunsen burner
one candy gummy bear
CAUTIONS!
• Caution! This reaction produces a large quantity
of heat, flame, and smoke (mostly water vapour).
It should be done in a well ventilated room, or,
preferably, in a fume hood. Potassium chlorate
should be used with caution. It is a strong
oxidizing agent, especially when molten. Keep all
combustible materials away from the reaction
area. Make sure the test tube used is
scrupulously clean and the mouth is pointed
away from the audience. GOGGLES!
Procedure:
1. Set up the stand and clamp, and support the
test tube in the clamp in a vertical position.
2. Add 5-7 grams of potassium chlorate to the
test tube (about 1 cm in depth).
3. .Gently heat the tube with the burner until
the potassium chlorate is completely molten.
Bubbles of oxygen will begin to form.
4. .Remove the burner and use crucible tongs to
drop in the gummy bear, and stand back!
Analysis
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Student Analysis:
What is a decomposition reaction?
Write a balanced reaction for the decomposition of potassium chlorate.
How could we test for the presence of oxygen in this decomposition reaction?
Why is it necessary to heat this reaction?
What is the difference between an endothermic and an exothermic reaction?
Write a balanced reaction for the oxidation of glucose. Show, using oxidation numbers, which
substance is oxidized and which substance is reduced in the reaction. Also state the oxidizing agent
and the reducing agent.
What caused the Gummy Bear to explode?
Observe the products of this reaction. Did the reaction go to completion, forming only CO2 and
H2O? What would the products include if the combustion was incomplete?