CBSE Class 9 > Class 9 Notes > Science New NCERT 2026-27 (New Syllabus) > NCERT Textbook: Earth as a System: Energy, Matter, and Life
NCERT Textbook: Earth as a System: Energy, Matter, and Life
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| 1. What are the main components of the Earth as a system? |  |
Ans. The Earth as a system consists of four main components: the atmosphere, hydrosphere, lithosphere, and biosphere. The atmosphere is the layer of gases surrounding the Earth, the hydrosphere includes all water bodies, the lithosphere is the solid outer layer of the Earth, and the biosphere encompasses all living organisms and their interactions with the other components.
| 2. How does energy flow through the Earth's systems? | |
Ans. Energy flows through the Earth's systems primarily via the Sun, which provides solar energy. This energy is absorbed by the Earth's surface and drives processes such as weather, climate, and photosynthesis. The flow of energy can be seen in food webs, where energy is transferred from producers to consumers and then to decomposers, illustrating the interconnectedness of life and energy transfer.
| 3. What role does matter play in Earth's systems? | |
Ans. Matter is essential in Earth's systems as it forms the basis of all physical substances, including rocks, water, and living organisms. The cycling of matter, such as the water cycle and the carbon cycle, ensures that essential elements are recycled and made available for use by different organisms, thus maintaining the balance of ecosystems.
| 4. What is the significance of life in the Earth system? | |
Ans. Life plays a critical role in the Earth system by influencing the environment and contributing to the cycling of matter and energy. Organisms interact with their surroundings, modifying habitats and affecting processes like nutrient cycling and energy flow. This intricate interplay helps sustain ecosystems and maintain the balance necessary for life to thrive on Earth.
| 5. How do human activities impact Earth's systems? | |
Ans. Human activities significantly impact Earth's systems through actions such as deforestation, pollution, and urbanisation. These activities can disrupt natural cycles, alter habitats, and lead to climate change. For instance, the burning of fossil fuels increases greenhouse gas emissions, which contributes to global warming and affects weather patterns, biodiversity, and water resources.
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Apr 25, 2026 Last updated
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Document Description: NCERT Textbook: Earth as a System: Energy, Matter, and Life for Class 9 2026 is part of Science Class 9 New NCERT 2026-27 (New Syllabus) preparation. The notes and questions for NCERT Textbook: Earth as a System: Energy, Matter, and Life have been prepared according to the Class 9 exam syllabus. Information about NCERT Textbook: Earth as a System: Energy, Matter, and Life covers topics like and NCERT Textbook: Earth as a System: Energy, Matter, and Life Example, for Class 9 2026 Exam. Find important definitions, questions, notes, meanings, examples, exercises and tests below for NCERT Textbook: Earth as a System: Energy, Matter, and Life.
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NCERT Textbook: Earth as a System: Energy, Matter, & Life of Science Class 9 New NCERT 2026 is the updated edition as per the latest syllabus of the 2026-27, PDF available for download.
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