Class 10 Science — Chapter 13: Our Environment

What you'll learn

• ▸Ecosystem and its Components
• ▸Roles of Organisms: Producers, Consumers, Decomposers
• ▸Food Chains and Trophic Levels
• ▸Energy Flow and the 10% Law
• ▸Food Webs
• ▸Biological Magnification
• ▸The Ozone Layer: Function and Depletion

Chapter Summary

--- PAGE 1 --- 1064CH15 CHAPTER 13 Our Environment We have heard the word 'environment' often being used on the television, in newspapers and by people around us. Our elders tell us that the 'environment' is not what it used to be earlier; others say that we should work in a healthy 'environment'; and global summits involving the developed and developing countries are regularly held to discuss 'environmental' issues. In this chapter, we shall be studying how various components in the environment interact with each other and how we impact the environment. 13.1 ECO-SYSTEM — WHAT ARE ITS COMPONENTS? All organisms such as plants, animals, microorganisms and human beings as well as the physical surroundings interact with each other and maintain a balance in nature. All the interacting organisms in an area together with the non-living constituents of the environment form an ecosystem. Thus, an ecosystem consists of biotic components comprising living organisms and abiotic components comp…

Practice Questions from this Chapter

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1. Explain producers, consumers, and decomposers simply. Get Solution →
2. Show me an example of a human-made ecosystem. Get Solution →
3. Describe how energy flows through a food web. Get Solution →
4. What do all the interacting organisms in an area, together with the non-living constituents of the environment, form? Get Solution →
5. Which of the following is an example of an abiotic component of an ecosystem? Get Solution →
6. According to the text, which of the following is an example of a human-made (artificial) ecosystem? Get Solution →
7. Organisms like green plants that can produce their own food from inorganic substances using sunlight are called what? Get Solution →
8. What is the primary role of microorganisms like bacteria and fungi in an ecosystem? Get Solution →

Did you know?

• 💡 A single teaspoon of healthy soil contains billions of living organisms.
• 💡 Some plants release chemicals to warn other plants about insect attacks.
• 💡 The ocean is Earth's largest ecosystem, covering over 70% of its surface.
• 💡 Deep-sea ecosystems exist entirely without sunlight, powered by chemicals.
• 💡 A food chain rarely has more than four or five steps due to energy loss.

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