Question

For a science fair project, Tobin attempted to build a self-sustaining terrestrial ecosystem. To build the ecosystem, he first placed 0.5 liters of wet dirt and sand in a layer at the bottom of a 2.5 liter glass container. He planted several ferns in the dirt and then added worms and crickets to the ecosystem. He placed an oxygen sensor inside the container to record the oxygen concentration of the air. He then secured a lid on the container. Tobin placed the ecosystem in front of a partially shaded window. Every day, he recorded the oxygen concentration in the air of the terrarium, measured in grams per liter. His results are shown in the table below. Day Concentration of Oxygen in Air (g/L) 1 0.299 2 0.297 3 0.292 4 0.286 5 0.279 Which of the following provides the most reasonable explanation for Tobin's results in terms of the mass of oxygen over the first five days?

Answer 1

Answer:

I don't know the answer to your question

Explanation:

Answer 2

Answer:

Approximately 0.040 grams of the oxygen from the ecosystem air was incorporated into new molecules that were used by organisms or released to the soil as waste.

Explanation:

I had the study island