Our Environment is an important chapter in Class 10 Science that helps students understand the relationship between living organisms and their surroundings. The chapter explains ecosystems, food chains, food webs, and the impact of human activities on the environment. It also highlights the importance of conserving natural resources for a sustainable future.

Environment and Ecosystem

The environment includes all living and non-living components surrounding us. An ecosystem is a functional unit where living organisms interact with each other and with their physical environment. Examples of ecosystems include forests, ponds, deserts, and grasslands.

Components of an Ecosystem

An ecosystem consists of:

Biotic Components

These are the living organisms present in an ecosystem, such as plants, animals, and microorganisms.

Abiotic Components

These are the non-living factors such as air, water, soil, sunlight, and temperature that influence living organisms.

Food Chain

A food chain is a sequence of organisms in which each organism depends on the previous one for food. It shows the flow of energy from producers to consumers and finally to decomposers.

Types of Organisms in a Food Chain

• Producers (Green plants)
• Consumers (Herbivores, carnivores, omnivores)
• Decomposers (Bacteria and fungi)

Food Web

A food web is a network of interconnected food chains in an ecosystem. It helps maintain ecological balance by providing multiple feeding relationships among organisms.

Biodegradable and Non-Biodegradable Substances

Biodegradable Substances

These substances can be broken down naturally by microorganisms. Examples include paper, vegetable waste, and cotton.

Non-Biodegradable Substances

These substances do not decompose easily and may remain in the environment for a long time. Examples include plastics, glass, and certain chemicals.

Environmental Problems

Human activities such as deforestation, pollution, excessive use of plastics, and improper waste disposal can harm ecosystems and disturb ecological balance. Environmental conservation is necessary to protect biodiversity and natural resources.

Importance of Environmental Conservation

Conserving the environment helps maintain ecological balance, supports life on Earth, protects natural resources, and ensures a healthier future for coming generations.

CBSE Exam Preparation Tips

Students should focus on understanding ecosystems, food chains, food webs, and the differences between biodegradable and non-biodegradable substances. Regular revision of NCERT diagrams, examples, and textbook questions will help strengthen concepts and improve exam performance.