I think I can, I think I can… I just need my CO 2, H 2 O and light…

 Takes place in the chloroplast of plant cells  Cells in the leaves have the most chloroplasts because they are closest to the sun!

 (Adenosine triphosphate)  Universal energy currency  When we talk about energy being either produced or used we are talking about it in the form of ATP  ATP, your rechargeable battery  We “recharge” through eating!  Just add P!  P stands for what element??

 Pathway that converts light energy into chemical energy  Source of light energy usually is:  Chemical energy stored as:  Plants then use the sugars (glucose) to produce high energy carbohydrates like starches. sun Glucose (Sugar)

 CO 2  CO 2 + H 2 O H 2 O + light  C 6 H 12 O 6 C 6 H 12 O 6 + O2O2O2O2  Carbon dioxide + water + light  sugar + oxygen

Carbon dioxide + water + light  sugar + oxygen  No CO 2 = no photosynthesis  Shortage of water can slow or stop photosynthesis  (Plants in extreme areas have evolved to protect against this)  Intensity of light  (There is an upper limit – plants have a maximum limit)

Carbon dioxide + water + light  sugar + oxygen  Temperature  The enzymes that assist in photosynthesis can only work in a certain temperature range. (32˚F – 95˚F)  Anything colder or warmer and you risk damaging the enzymes  At VERY low temperatures, photosynthesis stops entirely

 Plants and some types of organisms are able to use light energy from the sun to produce food  “auto” = “self”  “troph” = “nourishment”  Plants! And SOME bacteria!  Other organisms cannot use the sun’s energy directly- we call them Heterotrophs!  “hetero” = “other”  Examples  Animals  Fungi (decomposers)