What does Fe plus Mg represent?

What is it called when a glowstick turns on? Which set of chemical reactions is performed by the chloroplast of the cell? How many macro drops are there in 1 ml? What amount of nutrients does salt water have? How did Louis Pasteur disprove the spontaneous generation theory? What are chunks of ice orbiting gas giants equator called? Will a asteroid hit earth again? Yeast help in the production of oxygen or alcohol or glucose or salts? What are three primary factors that affect the rate of photosynthesis? Which characteristic is seen on maps of very large areas? What are the affects of biomass on our ozone layer? What is a tree with fake snow called? Why gases conduct electricity when pressure is reduced in discharge tube? What is the 4th step in pollination? Is a leaf a plant? Why does the excitation of molecules not take place during the stimulted emission process? What is the rate of cooling for gabbro? How are algae and plankton different? What are the disadvantages of plate service? Is matter still the same state even though it has changed state?