PLEAEES HELP I'LL GIVE BRAINLIST TO ANYBODY WHO IS RIGHT

Phenomenon: On September 26th 1991, 8 scientists locked themselves inside a smaller model of the earth's biosphere, called Biosphere 2. No one was allowed to leave or enter for two years. The scientists had to grow their own food, recycle all their human waste and water, and make sure there was the proper balance of oxygen and carbon dioxide in the air they were breathing.

This biosphere was considered a closed system because it was sealed off from the outside world. There was no exchange of liquid, solid, or gas matter. Even the bottom of the biosphere was sealed off from the earth below with a large sheet of metal. Biosphere 2 received sunlight and heat energy with the outside world, but did not exchange carbon dioxide, water, and oxygen.



Design a Hypothetical Experiment

Design an experiment that would help scientists figure out why the levels of Oxygen decreased in Biosphere 2

How are you going to test your hypothesis? Will it be full scale test or will you be using a model?

what will you use as a control group?

How will you know if you are successful?

write out the steps for setting up running the experiment.
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