Photosynthesis: Life from Light and Air 2008-2009

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) = used to build the sugar  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 CO2 ATP sugars enzymes H2O

Photosynthesis ATP ADP _______ _______ _______ _______ _______ _______ sun Photosynthesis _______ _______ _______ ADP ATP _______ _______ _______ used immediately to synthesize sugars H2O sugar CO2

Chloroplasts are only in plants animal cells plant cells

Chloroplasts _____________ _____________ Leaf Leaves sun Leaves CO2 _____________ _____________ ___________ _______________ __________ __________ __________ _____________ _____________

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

Leaf Structure _______________________ ___________ ____________

Transpiration xylem (water) stomate guard cells ____________ O2 H C so it gets to leaves from roots O2 H C

Transpiration Water evaporates from the stomates in the leaves pulls water up from roots water molecules stick to each other more water is pulled up tree from ground

Function of Leaf Structures Cuticle ________________________________________ Epidermis Palisades layer Spongy layer

Stomates & Guard Cells guard cell stomate __________________________________ ______________________________ gets to leaves for photosynthesis guard cell stomate

Guard cells & Homeostasis keeping the internal environment of the plant balanced ________________________

Xylem ______________________

Phloem: food-conducting cells ____________________________________________________________ __________________

glucose + oxygen  carbon + water + energy How are they connected? ________________ glucose + oxygen  carbon + water + energy dioxide C6H12O6 6O2 6CO2 6H2O ATP  + _________________ 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 6CO2 6H2O C6H12O6 6O2 light energy  +  glucose + oxygen carbon dioxide sun + water +

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

Energy cycle ATP Cellular Respiration Cellular Respiration CO2 O2 H2O capture light energy Cellular Respiration synthesis ____________________ H2O CO2 __________ __________ _______ O2 _______ _______ _______ ____________________ digestion Cellular Respiration ATP release chemical energy

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!! 2008-2009