The internal environment of an earthworm is a highly active bioreactor. The mucus and fluids inside the worm's gut stimulate dormant soil microbes. When earthworms excrete casts, they deposit concentrated populations of beneficial bacteria and fungi back into the soil. This microbial spike accelerates the natural decomposition of organic matter, establishing a self-sustaining nutrient cycle. Vermiremediation: Neutralizing Toxins in Brownfield Sites
(word bank example): Worms improve soil by increasing oxygen levels, breaking down toxins , and creating nutrient-rich casts. Unlike chemical methods, this process is low-cost and sustainable .
Their castings (waste) act as a powerful natural fertilizer. Reading Passage Answers
In 1990, a rescue plan was proposed by the local landscaping company and the regional developer Scottish Greenbelt . Rather than using expensive traditional methods, they opted for a low-cost, biological solution: vermiremediation (using earthworms to restore soil).
– The initial state of the derelict site before the project began. worms put new life into derelict site reading answers
What is unique about the earthworms used in this project? A. They were imported from another country. B. They are hermaphrodites and can reproduce without a mate. C. They only eat sewage material. D. They were raised in a laboratory.
Worms dig deep vertical tunnels. This breaks up compacted, industrial soil.
Without earthworms, the natural soil regeneration process would take up to . With them, the timeline reduces to just 5-10 years.
Explanation: Earthworms require a food source to survive in harsh derelict environments; researchers added organic waste to stimulate their population growth. Heavy metals The internal environment of an earthworm is a
The passage explains how scientists used worms (specifically Eisenia fetida ) to restore contaminated, derelict industrial land (brownfield sites). Worms accelerate soil remediation by breaking down pollutants, aerating soil, and working alongside bacteria.
What caused the soil at the Hallside site to be unable to support construction? A. The site was left abandoned for too long. B. Heavy metals made the land unsuitable. C. The soil lacked necessary minerals. D. Brick and mortar were unavailable.
Their deep-burrowing habits create tunnels that allow air and water to penetrate the compacted soil.
Medium Question types typically included: Their castings (waste) act as a powerful natural fertilizer
Burrowing earthworms act as natural plows. As they move through compacted substrate, they create an extensive network of tunnels.
– The biological reason why worms are suited for this specific task.
When answering questions about this passage, test-takers often confuse these points:
The phrase acts as your primary anchor. When skimming the passage, look for synonyms like brownfield, abandoned land, wasteland, or former industrial zone . Understanding the Worms' Mechanism
Worms improve soil structure by creating a network of burrows .