This Week In Science #13

In our tank there is a plant. It is somewhat alive. If we were too seal the tank and removed the plant the spiders are more likely to die than survive. I think that the plant is helpful because it helps complete the cycle of photosynthesis. If there were no plants in the tank the spiders would die because there would be no oxygen. There would be too much carbon dioxide because the spiders would keep producing CO2 without any plants taking it in.