Our Environment

Overview

Our Environment is a foundational topic in Environmental Studies (EVS) for WB TET Paper I. It introduces the basic components that make up the world around us and explains how living and non-living things interact with each other. Understanding this topic is essential because it forms the conceptual base for all other EVS topics—water, air, soil, plants, animals, and pollution are all parts of the environment.

For the WB TET exam, expect questions that test your understanding of environmental components, their classification, and how they depend on one another. Questions often involve identifying examples of biotic and abiotic factors, understanding food chains, and recognising human impacts on the environment. This topic also connects directly to pedagogy questions about teaching environmental awareness to young learners.

Mastering this topic means being able to classify environmental components correctly, explain interdependence through examples, and understand the balance that exists in nature. Teachers must be able to simplify these concepts for primary-level students using local, relatable examples.

Key Concepts

• **Environment** refers to everything that surrounds us—the air we breathe, water we drink, land we live on, and all living beings around us. It includes both natural and human-made elements.

• **Components of environment** are broadly divided into two categories: biotic (living) and abiotic (non-living). This classification is fundamental to understanding ecological relationships.

• **Biotic components** include all living organisms—plants (producers), animals (consumers), and microorganisms (decomposers). Each plays a specific role in the ecosystem.

• **Abiotic components** include non-living physical and chemical factors such as sunlight, temperature, water, air, soil, and minerals. These determine which organisms can survive in an area.

• **Interdependence** means that all components of the environment depend on each other for survival. Plants need soil, water, and sunlight; animals need plants and other animals for food; decomposers break down dead matter to enrich soil.

• **Ecosystem** is a self-sustaining unit where biotic and abiotic components interact. Examples include ponds, forests, grasslands, and deserts.

• **Food chain** shows the transfer of energy from one organism to another. It always begins with producers (green plants) and moves through primary consumers, secondary consumers, and decomposers.

• **Balance in nature** refers to the stable state where populations of organisms remain relatively constant because of interdependence. Human activities often disturb this balance.