Class 8 Science - HARYANA
How Nature Works in Harmony
The chapter 'How Nature Works in Harmony' for Class 8 Science under the Haryana Board (BSEH) explores the delicate balance present in natural ecosystems. Students learn about the interdependence of plants, animals, and microorganisms, energy flow in food chains and food webs, and nutrient cycling like the carbon and nitrogen cycles. The chapter emphasizes the importance of biodiversity and how human activities disrupt natural harmony, leading to environmental issues. Understanding this chapter is crucial for board exams as it forms the foundational base for environmental science concepts tested frequently in objective and descriptive questions.
Start Learning FreeKey Concepts
Ecosystem
A self-sustaining community of living organisms interacting with each other and their non-living physical environment.
Food Chain and Food Web
A food chain shows the linear transfer of energy from producers to consumers, while a complex interconnected network of multiple food chains forms a food web.
Biodiversity
The variety of plant and animal life in a particular habitat or on Earth, which is essential for maintaining ecological balance.
Nutrient Cycling
The movement and exchange of organic and inorganic matter back into the production of living matter, exemplified by cycles like water, carbon, and nitrogen.
Ecological Balance
A state of dynamic equilibrium within a community of organisms where diversity remains relatively constant over time.
Important Formulas
Board Exam Info
This chapter typically carries around 4 to 6 marks in the Haryana (BSEH) Class 8 Science examination. Common question types include defining key ecological terms, differentiating between a food chain and a food web, and short-answer questions explaining the importance of maintaining nature's balance.
Frequently Asked Questions
What is the difference between a food chain and a food web?
A food chain is a single straight-line path of energy flow, whereas a food web consists of many overlapping and interconnected food chains in an ecosystem.
Why is biodiversity important for nature?
Biodiversity ensures ecosystem resilience, stability, and provides essential services like pollination, clean water, and nutrient recycling.
What happens if a primary consumer is removed from a food chain?
The population of producers will increase due to a lack of grazing, and the secondary consumers will face starvation due to a lack of food, disrupting the ecosystem.
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