Question

у скляну банку з чистим піском помістили дощових червів.Декілька місяців туди додавали пісок і воду.Згодом на поверхні піску утворився темний шар.Поясніть чому.​

Answer 1

Ответ:

Незнаю, может потому что листя свои речовини выпустили и воно згнило бо не было у листя жизни. оно же на деревьях развивается а тут в писке ничего нету ни сока не дерева. и оно потеряло свойства и згнило и перетвлрилось на кучу шара чёрного

Answer 2

Formation of Dark Layer on the Surface of Sand in a Glass Jar with Earthworms

The formation of a dark layer on the surface of sand in a glass jar with earthworms can be attributed to several factors. Here are some possible explanations:

1. Organic matter decomposition: Earthworms are known for their role in decomposing organic matter. As they consume organic material such as dead plant material and microorganisms in the soil, they excrete waste in the form of castings. These castings are rich in nutrients and organic matter. Over time, the accumulation of earthworm castings on the surface of the sand can contribute to the formation of a dark layer [[1]].

2. Microbial activity: Earthworms create a favorable environment for microbial activity in the soil. The presence of earthworms can enhance the microbial decomposition of organic matter, leading to the release of byproducts such as humic substances. Humic substances are dark-colored organic compounds that can contribute to the darkening of the sand surface [[2]].

3. Chemical reactions: The interaction between organic matter, minerals in the sand, and microorganisms can result in chemical reactions that produce dark-colored compounds. For example, the breakdown of organic matter by microorganisms can release substances like melanin, a pigment responsible for dark colors in many organisms. These substances can accumulate on the surface of the sand, leading to the formation of a dark layer [[3]].

It's important to note that without further information or analysis, it is difficult to determine the exact cause of the dark layer in the specific scenario described. The explanations provided above are based on general knowledge about earthworms, organic matter decomposition, and soil processes.

I hope this explanation helps! Let me know if you have any further questions.