A group of children, "Little Explorers," participate in a science experiment to study earthworms and their importance in the ecosystem. They set up a mini-terrarium with different types of soil, leaves, and other materials, and introduce earthworms into the environment. Over several days, they observe the earthworms' behavior, noting how they mix the soil, break down leaves, and create tunnels. The children also learn about the earthworms' anatomy, including their five hearts and ability to move through the soil. After three weeks, they release the earthworms into the garden, where they will help to fertilize the soil and promote plant growth.
Here are the key facts extracted from the text:
1. Queen Cleopatra considered earthworms sacred.
2. Charles Darwin dedicated a treatise to earthworms.
3. Earthworms have 5 hearts that are actually 5 pumps to pump blood throughout their body.
4. Earthworms are decomposers and help break down organic matter.
5. Earthworms prefer a humid and dark environment.
6. Earthworms lay eggs that can be dormant in compost, leaves, etc. and hatch when they find the right environment.
7. Earthworms can move through the soil and mix different layers together.
8. Earthworms are attracted to certain types of soil and can be found in gardens, greenhouses, and under hedges.
9. Earthworms are an important part of the food chain and ecosystem.
10. Earthworms can be kept in a terrarium with different types of soil, leaves, and other organic matter.
11. Earthworms can be fed with dry leaves, grass, and other organic matter.
12. Earthworms can be released into the garden after 3 weeks in a terrarium.
13. Earthworms can help improve soil quality and fertility.
14. Earthworms are preyed upon by hens and other animals.