2/24/15
Date:
2/24/15
Topic:
Photosynthesis
Page # ___
Date:
2/24/15
Topic:
Photosynthesis
Page # ___
Today in Room 315…
ADMIT SLIP: Answer the pre-lab questions
HW: Finish the lab packet and answer the assessment ?s
CONTENT OBJ: SW investigate the variables affecting
photosynthetic rate using inquiry
LANG. OBJ: SW write a letter to local farmer’s with their
findings
ANNOUNCEMENTS: Chapter Test on Friday!
AGENDA:
Review AS
Read through Lab Intro
Demo Gizmo
Complete Gizmo
EXIT SLIP: All computers away and plugged in
Photosynthesis Gizmo
Virtual lab experience
Allows you to run scientific experiments in
MUCH less time
Watch DEMO
Note: Use Internet Explorer. Chrome may not work!
www.explorelearning.com
Click: Log In (upper right corner)
Username: tbaGIZMO
Password: tbaGIZMO
Click: Teacher: James Louis
Photosynthesis Lab- Launch Gizmo
Set up “Control” setting, and begin!
Homework
Finish the lab packet (ALL of it!)- due
TOMORROW
Answer the multiple choice assessment
questions packet (separate from lab packet)
ALSO DUE TOMORROW
2/24/15
Date:
2/24/15
Topic:
Photosynthesis Cont.
Page # ___
Date:
2/25/15
Topic:
Photosynthesis
Page # ___
Today in Room 315…
ADMIT SLIP: Do plants go through cellular respiration?
HW: Study notes for tomorrow! (Make a study guide!)
CONTENT OBJ: SWBAT recognize and explain the
similarities/differences between cell resp. & photosyn
LANG. OBJ: SW write notes in their journals
ANNOUNCEMENTS: Chapter Test Friday!
AGENDA:
Admit slip share out
Watch video on photosyn.
Photosyn notes
Watch video on photosyn/cellresp
EXIT SLIP: 3-2-1
Photosynthesis Video
https://www.youtube.com/watch?v=i8c5JcnFaJ0
( start at 9:30)
All Life Needs Energy*
Plants are producers, animals are consumers. Explain?
Animals are heterotrophs, meaning…
They get their energy from “eating others”
(hetero = other)
Plants are autotrophs, meaning…
They produce their own energy (auto = self)
Plants need energy
Can’t eat other plants! So, need the sun to
collect light energy  chemical energy
Need to obtain nutrients from environment to
build bigger energy molecules
ex. CHNOPS  C6H12O6 (glucose)
How do they get the materials needed?
Plant Structure*
k
Leaves =
collect
sunlight
Roots = collect
water & nutrients
Stomata =
exchange gas
(CO2 & O2)
Photosynthesis*
The process by which green plants, some
bacteria, and some protists use sunlight energy,
water, and carbon dioxide to produce glucose
and oxygen
6CO2 + 6H2O + Energy  C6H12O6 + 6O2
Two Part Process*
1. Light Reactions:
Requires light; converts light energy to chemical
energy
Occurs in the thylakoid membrane (see above)
Collects light energy and forms ATP & NADPH
Oxygen produced
Light
Reactions*
Light energy from the sun stimulates a protein
(called a “photosystem”) in the thylakoid
membrane to split H2O molecules into oxygen
and hydrogen ions
Oxygen is released (byproduct)
Hydrogen ions  protons (H+)  available for
electron transport chain
Light Reactions*
Use an electron transport chain just like in cellular
respiration!
Light energy and a proton (H+) gradient use ATP
synthase to produce ATP (light  chemical energy)
Both of these systems (cellular respiration &
photosynthesis) have ETCs, because they were both
derived from the same primitive ancestor!
Cell resp: ETC in mitochondria w/ electron carrier NADH,
Photosyn: ETC in chloroplast w/ electron carrier NADPH
Two Part Process*
2. Light-independent Reactions (Calvin Cycle)
Does not require light, but DOES require the
product of the light reaction (ATP)
Takes place in the stroma of the chloroplast
Uses ATP & NADPH to reduce CO2 and
synthesize (create) C6H12O6 (glucose)
NOT called the dark reactions because CAN
occur in light (just doesn’t need to)
Making connections…
Cellular Respiration ^
Photosynthesis ^
How are they related?
Photosynthesis Video
https://www.youtube.com/watch?v=i8c5JcnFaJ0
(start at 9:30)
Cell Resp & Photosyn.
How do they relate?
https://www.youtube.com/watch?v=eo5XndJaz-Y