Question

an exper

Chapter 8 Photosynthesis in class Group Assignment Each member of the group should be assigned as the "le of the group should be assigned as the lead" for one question. The lead is responsible for leading the group discussion for that question and for writing the gro sion for that question and for writing the group answer for that question. Use a separate sheet for your answers. Leader name 1. Jan Baptista van Helmont did an important experiment related to photosynthesis. He weighed a small willow tree and a pot of soil. Jan then planted the tree in the pot. Over the course of five years, he added only water to the POL. At the end of five years, he weighed (dry welat excludes water the tree and found that it had gained 74,400 8. He weighed the soil (dry weight), and it was only 57 less. Where did the additional 74,350 grams come from? Explain. Leader name 2. Biosphere 2 is a research facility designed to be an artificial, closed ecosystem. The closed nature of th biosphere allows relatively precise monitoring of various factors like gasses and other ecosystem proce mount of carbon dioxide in Biosphere 2 over a typical 24 hour period.

Answer 1

Photosynthesis Sunlight Water Oxygen given off into air bunlieb Light Sunlight 6202 + 6H2O -> Co Higor +O2) Starch СЫorophy) : o chlorophyll | trappead light energy to make food o to Leaf (Water • absorbed from the roots. Carbon dioxide from air

Answer:-> - Helmont performed the five year plant experiment. Over the course of five years, he added only cociter to the pot of planta At that time, be knew nothing of photosynthesis so he concluded that the trees weight increased by 74,350 grams had come from coater. As be added only coater during experiment, be argued that the growth, change in weight, accumulation of bork & roots had been formed based on the supply of coalessalone But actually, the increased 74,350 gram weight comes from photosynthesis, in cohich ... carbon from air and minerals from soil are used to generate new plant tissue & growth Photo supthesis is a process by cobich green plants turso čtmospheric carbon dioxide and weetes into food corqanic molecules) usiog energy from Supliebt. The green color pigroente present in then Teaf are called chlorophyll. It helps to absorb Sunlight_duming photosynthesis