Light as a Factor in Photosynthesis

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Transcript Light as a Factor in Photosynthesis

Light as a Factor
in
Photosynthesis
GERANIUM LEAF LAB
Pigment as a
Factor in
Photsynthesis
Coleus Leaf Lab
Sketch the
Original
variegated
Coleus
leaf
shown
Color
matters!
Sketch the
Coleus leaf
after
treatment
(boiled)
with
alcohol
Sketch the
Coleus leaf
after
treatment
with
Lugols
QUESTIONS TO CONSIDER:
What did the Lugol’s indicate
about the leaf?
Where is this substance found
in the leaf?
Write a brief conclusion for this
experiment.
Gas as a
factor in
Photsynthesis
Elodea Lab
DAY 1 in Light
Sketch
the bottle
with
Elodea
and BTB,
remember
color
matters!
DAY 2 after 24 hours
Sketch the
bottle with
Elodea and
BTB,
remember
color
matters!
Questions to consider:
What changes did you observe
in the bottle?
Why did these changes occur?
What does this indicate?
Write a brief conclusion for
this experiment.
Photosynthesis
• Process of converting suns energy into
chemical energy (food)
• ATP is the ‘fuel’ for the plant
– Usable energy
• Plants need
–
–
–
–
Sunlight ( leaves are like solar panels)
Water (roots take in water)
Chlorophyll (green parts)
CO2 ( enters through small porous openings under the
leafs)
Photosynthesis
• Plants take in the previous four substances
• Sugar is produced
– Used for food
• Release O2
– WHAT WE BREATHE!
General Equation:
6CO2 + 6H20
C6H12O6 + 6O2