Today we set up our bottle biome two liter bottles. We used duct tape to connect the three pieces of the bottles. There is a hole in the cap of the bottle which is where the cotton string went through it. We filled the bottom portion with water until it touched the cap of the bottle. We filled the top portion with 8-10 cm of potting soil then proceeded to add seeds with soil on top. Also, we added a top to cover the entire bottle. What i expect to happen is for the plant to grow on the top portion of the bottom and for us to be able to see the roots on the bottom portion.
Bottle Biome Experiment 