Living organisms require energy for growth, respiration, reproduction, and movement. Primary producers such as plants absorb energy from the sun and convert it to biomass, via photosynthesis, which is then either used for cellular respiration or passed up the food chain. In this activity, measure dissolved oxygen to observe the photosynthesis and cellular respiration of an aquatic plant under different conditions and demonstrate what plants need for each process. This kit contains enough materials for 8 groups of students and comes with a Teacher's Manual and student study guide copymaster. The activity covers AP Environmental Science primary learning objective ENG-1.A.* Kit Includes 2 Manganese Chloride Reagent, 25 mL 2 Alkaline Iodide Reagent, 25 mL 2 Sulfuric Acid, 50%, 25 mL 2 Starch Indicator Solution, 15 mL 2 Sodium Thiosulfate Titrant, 0.002 M, 750 mL 24 Pipettes 16 Sample Bottles with Caps DOT Info: Small Qty Exemption 49CFR173.4 THIS PACKAGE CONFORMS TO 49 CFR 173.4 for domestic highway or rail transport only WARNING: This product can expose you to chemicals including Strong inorganic acid mists containing sulfuric acid, which are known to the State of California to cause cancer. For more information go to www.P65Warnings.ca.gov. *AP® and the Advanced Placement Program are registered trademarks of the College Entrance Examination Board. The activities and materials in these kits were developed and prepared by Aldon, which bears sole responsibility for their contents.