photosynthesis turning light into life. what is photosynthesis? autotrophs convert sunlight ...
DESCRIPTION
Plants provide Chemical energy on which all life depends Oxygen – plants created our atmosphere Materials – shelter, clothing, medicine Food – for (almost) all other life formTRANSCRIPT
PhotosynthesisPhotosynthesisTurning Light into LifeTurning Light into Life
What is Photosynthesis?What is Photosynthesis?Autotrophs Autotrophs
convertconvert Sunlight Sunlight to Chemical to Chemical
EnergyEnergy
Plants providePlants provideChemical energy on which all life dependsChemical energy on which all life dependsOxygen – plants created our atmosphereOxygen – plants created our atmosphereMaterials – shelter, clothing, medicineMaterials – shelter, clothing, medicineFood – for (almost) all other life formFood – for (almost) all other life form
All the catching of facts All the catching of facts is done for youis done for you
All the breaking down of All the breaking down of complex information is complex information is done for youdone for you
All the digesting of All the digesting of difficult chemical difficult chemical formulas is done for youformulas is done for you
All you have to do is All you have to do is swallow it!swallow it!
Photosynthesis the easy wayPhotosynthesis the easy way
COCO22 + + HH22OO CC66HH1212OO66 + + OO22
Materials Required for Photosynthesis:Materials Required for Photosynthesis: Sunlight – provides energySunlight – provides energy Carbon Dioxide – provides carbon Carbon Dioxide – provides carbon Water – provides electronsWater – provides electrons & enzymes to put everything together!& enzymes to put everything together! Oxygen is a “waste product” after Oxygen is a “waste product” after
electrons have been removed from waterelectrons have been removed from water
Where does Where does photosynthesis take photosynthesis take
place?place?
http://extension.oregonstate.edu/mg/botany/images/fig12a-small.gif
Leaf StructuresLeaf Structures• Cuticle & epidermis protect plantCuticle & epidermis protect plant• Stomates allow gases in and outStomates allow gases in and out• Veins in leaf transport water, Veins in leaf transport water,
nutrientsnutrients• Xylem - water & minerals up from Xylem - water & minerals up from
rootsroots• Phloem - food from leaves to plantPhloem - food from leaves to plant
Leaf StructuresLeaf Structures• Mesophyll = middle leafMesophyll = middle leaf
• Palisade layer is where most Palisade layer is where most photosynthesis takes placephotosynthesis takes place
• Cells have many chloroplastsCells have many chloroplasts
• Spongy mesophyll allows gases to Spongy mesophyll allows gases to circulatecirculate
Chloroplasts are organelles within plant
cells with liquid (stroma) and
stacks of membranes
(grana)
Thylakoids – membranesthat form grana
Photosystems Photosystems Clusters of chlorophyll molecules in Clusters of chlorophyll molecules in
thylakoids that absorb light energy thylakoids that absorb light energy
http://kvhs.nbed.nb.ca/gallant/biology/thylakoid.jpghttp://kvhs.nbed.nb.ca/gallant/biology/thylakoid.jpg
Narrate this movie! Narrate this movie!
Pigments and ColorPigments and Color Chlorophyll a – most Chlorophyll a – most
important pigment in important pigment in photosynthesisphotosynthesis
Other pigments Other pigments are also presentare also present
Chlorophyll aChlorophyll a Chlorophyll aChlorophyll a
absorbsabsorbs blueblue & red light& red light
Chlorophyll a Chlorophyll a reflectsreflects green/green/yellowyellow lightlight
That’s why That’s why leaves look leaves look greengreen!!
Light Reactions - the BasicsLight Reactions - the Basics