Photosynthesis: Life from Light and Air 2006-2007

Plants are energy producers Like animals, plants need energy to live Unlike animals, plants don’t need to eat food to make that energy _____________________________

How do plants make energy & food? Plants use the energy from the sun _____________________________ glucose, sucrose, cellulose, starch, & more sun ATP sugars

Building plants from sunlight & air Photosynthesis 2 separate processes _______________________ collect sun energy use it to make ATP take the ATP energy collect CO2 from air & H2O from ground use all to build sugars ATP H2O + CO2 sugars carbon dioxide CO2 water H2O sugars C6H12O6 +

Using light & air to grow plants ______________________________________ ____________________________________________ (ATP)  glucose + oxygen carbon dioxide sun energy + water + 6CO2 6H2O C6H12O6 6O2 sun energy  +

What do plants need to grow? The “factory” for making energy & sugars __________________ Fuels The Helpers Make ATP! Make sugar! I can do it all… And no one even notices! sun H2O ATP sugars enzymes CO2

_______ _______ _______ ________ ________ ________ sun Photosynthesis _______ _______ _______ ADP ATP ________ ________ ________ sugar CO2

Chloroplasts are only in plants animal cells plant cells

_____________ _____________ _____________ _____________ Chloroplasts _____________ _____________ Leaf Leaf CO2 Chloroplasts Chlorophyll Chloroplast _____________ _____________

Energy Building Reactions H2O + light energy  ATP + O2 H2O _________________ _________________ _________________ sunlight Energy Building Reactions ATP O2

Sugar Building Reactions CO2 +  ATP C6H12O6 + ADP CO2 ____________ ____________ ____________ ____________ ____________ ____________ ADP Sugar Building Reactions ATP sugars C6H12O6

Putting it all together CO2 H2O C6H12O6 O2 light energy  + H2O CO2 _______________ ____________ sunlight ADP Energy Building Reactions Sugar Building Reactions ATP sugars C6H12O6 O2

So what does a plant need? Bring In ___________ Let Out Move Around leaves shoot roots 6CO2 6H2O C6H12O6 6O2 light energy  +

Leaf Structure ______________ photosynthesis ______________ __________ CO2 __________ ______ ______ _____________ O2 H2O CO2

Stomates ______________________ _______________ guard cell stomate

Xylem ______________________

Phloem: food-conducting cells ____________________________________________________________ __________________

Putting it all together Making a living… _____________________ leaves = solar collectors photosynthesis stomates = gases in & out roots take in water from soil pulled up by leaf evaporation roots take in from soil

How are they connected? Respiration  Photosynthesis  glucose + oxygen  carbon + water + energy dioxide C6H12O6 6O2 6CO2 6H2O ATP  + Photosynthesis So, in effect, photosynthesis is respiration run backwards powered by light. Cellular Respiration oxidize C6H12O6  CO2 & produce H2O fall of electrons downhill to O2 exergonic Photosynthesis reduce CO2  C6H12O6 & produce O2 boost electrons uphill by splitting H2O endergonic + water + energy  glucose + oxygen carbon dioxide 6CO2 6H2O C6H12O6 6O2 light energy  +

____________________ ____________________ sun Energy cycle Photosynthesis ____________________ H2O CO2 O2 ____________________ Cellular Respiration The Great Circle of Life! Where’s Mufasa? ATP

The poetic perspective All of the solid material of every plant was built out of thin air All of the solid material of every animal was built from plant material sun air Then all the cats, dogs, mice, people & elephants… are really strands of air woven together by sunlight!

Got the energy… Ask Questions!! 2006-2007