A World in a Bottle

Lab Report Guiding Question: How do organisms survive in a closed ecosystem? Hypothesis: I am hypothesizing that the plants will grow around 5 inches in 10 days. My hypothesis were almost correct. The plant grew 4 inches in 11 days. Materials: • Soil • Sand • Cotton • Seeds • Water • Plastic bottles • Moss Process: First my group and I have got two plastic bottles and cut the top of the bottle and put soil in the bottle, afterwards, we have planted seeds in the soil and sprinkled some water so it can grow faster. In the other bottle we cut the bottle, put the soil, planyed seeds and we have put cotton . We did this so we can see which one will grow faster and better. Variables: In our lab the controlled variables were, the soil, the seeds , and the water. The manipulated variables were cotton, and moss. Data collection: Table Data collection: In our lab we have measured the height of the plant daily, so that we can see how much did the plant grow from the day before we measured in inches. Our controlled variable was the height. Content Review In this lab the biotic factors were the seeds ,the soil , water. The abiotic factors were: cotton, moss, and sand. 2. The factors all have entered the terrarium, cotton for example helped us by growing the plants much faster. 3. A plant eating insect would be able to survive but for a short period of time because it will eat the plant in just few days. 4. It differs by: we planted the plants in a bottle, and we used cotton and moss and sand which differs a lot from the ecosystem in the world. Plants are mostly planted in soil in the ground. Conclusion: The Planting in a bottle with abiotic factors proved true. This type of planting worked a great deal. The plants grew over 10 inches this proved that this method could be used for a shorter period of time, because the roots wont have any more room to grow in the bottle. Further Inquiry: I am questioning, would the plants able to survive more time in the bottle even though their roots are getting bigger.