RBSE Class 7 Science Notes Chapter 17 Forests: Our Lifeline

These comprehensive RBSE Class 7 Science Notes Chapter 17 Forests: Our Lifeline will give a brief overview of all the concepts.

RBSE Class 7 Science Chapter 17 Notes Forests: Our Lifeline

→ Forest is a system comprising various plants, animals and micro-organisms.

→ Organisms which feed on plants often get eaten by other organisms, and so on. This is said to form a food chain. For example:
{Grass → insects → frog → snake → eagle}

→ Every part of the forest is dependent on the other parts. If we remove one component, all other components would be affected.

→ The presence of humus ensures that the nutrients of the dead plants and animals are released into the soil. From there, these nutrients are again absorbed by the roots of the living plants.

→ Many people also live in the forest. Some of them may belong to different tribes. The forest provides them food, shelter, water and medicines.

→ The forest keeps on growing and changing, and can regenerate.

→ The forest is a ‘dynamic living entity’ - full of life and vitality.

→ Forests not only help in controlling floods but also help maintain the flow of water in the streams so that we could get a steady supply of water.

→ Forests influence climate, water cycle and air quality.

→ Construction of roads, building, industrial development, increasing demand of wood, overgrazing of animals and indiscriminate falling of trees are some of the major causes of deforestation.