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Our Environment

🎓 Class 10📖 Science📖 10 notes🧠 15 Q&A⏱️ ~15 min

Our EnvironmentStudy Notes

NCERT-aligned · 10 notes · 3 shown free

Our Environment

Explanation

Our Environment

The environment is defined as the surrounding in which we live. It encompasses all living (biotic) and non-living (abiotic) components that affect us directly or indirectly. The biotic components include plants, animals, and microorganisms, while the abiotic components consist of air, water, soil, sunlight, temperature, and other physical factors. These components interact continuously, influencing each other and maintaining the balance necessary for life. The environment is not static; it changes due to natural processes and human activities. Understanding the environment is crucial because it sustains life and provides resources essential for survival. The environment also includes ecosystems, which are functional units where organisms interact with each other and with their physical surroundings. These interactions form complex networks that support biodiversity and ecological balance.

  • Environment includes all living and non-living things around us.
  • Biotic components: plants, animals, microorganisms.
  • Abiotic components: air, water, soil, sunlight, temperature.
  • Interactions between biotic and abiotic components maintain ecological balance.
  • Environment changes due to natural and human factors.
  • Ecosystems are functional units of the environment.
  • 📌 Environment: The surroundings including all living and non-living things.
  • 📌 Biotic components: Living organisms in the environment.
  • 📌 Abiotic components: Non-living physical and chemical elements.

Ecosystem

Explanation

Ecosystem

An ecosystem is a functional unit of nature where living organisms (plants, animals, and microorganisms) interact with each other and with the non-living components (air, water, soil, sunlight) of their environment. These interactions form a complex and dynamic system that sustains life. Ecosystems can be natural, such as forests, grasslands, and ponds, or artificial like agricultural fields. The components of an ecosystem are interdependent; changes in one affect others. The biotic components are categorized into producers, consumers, and decomposers. Producers, mainly green plants, synthesize food using sunlight through photosynthesis. Consumers depend on producers or other consumers for food. Decomposers break down dead organic matter, recycling nutrients back into the soil. The balance in an ecosystem is maintained through these interactions, ensuring the flow of energy and cycling of nutrients.

  • Ecosystem is a natural unit of living and non-living components interacting.
  • Includes biotic (producers, consumers, decomposers) and abiotic components.
  • Producers make food via photosynthesis.
  • Consumers depend on producers or other consumers for energy.
  • Decomposers recycle nutrients by breaking down dead matter.
  • Ecosystems maintain ecological balance through interactions.
  • 📌 Ecosystem: A community of living organisms interacting with their physical environment.
  • 📌 Producers: Organisms that produce food from sunlight (green plants).
  • 📌 Consumers: Organisms that consume other organisms for food.

Food Chain

Explanation

Food Chain

A food chain is a linear sequence of organisms through which energy and nutrients flow in an ecosystem. It shows who eats whom in the natural world. The food chain always begins with producers, usually green plants, which synthesize their own food us

Practice QuestionsOur Environment

Includes NCERT exercise questions with answers

Q1.The major source of air pollution is :
A.Using tidal energy
B.Using solar energy
C.Burning fossil fuels
D.Using Geothermal energy

Answer:

Burning fossil fuels

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Q2.Which source of energy is limited
A.Wind energy
B.Solar energy
C.Fossil fuels
D.Nuclear energy

Answer:

Fossil fuels

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Q3.12..___________________ ಜೈವಿಕ ವಿಘಟನೆಗೆ ಒಳಗೊಳ್ಳುತ್ತದೆ ಮತ್ತು ಪರಿಸರಕ್ಕೆ ಹಾನಿಯಾಗುವುದಿಲ್ಲ.
A.ಕಾಗದದ ಲೋಟ
B.ಪ್ಲಾಸ್ಟಿಕ್ ಲೋಟ
C.ಪ್ಲಾಸ್ಟಿಕ್ ಚೀಲ
D.ಪ್ಲಾಸ್ಟಿಕ್ ಪ್ಯಾಕೆಟ್ಸ್

Answer:

ಕಾಗದದ ಲೋಟ

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Q4.11.ಓಝೋನ್ ಪರಮಾಣು_____________ ಆಮ್ಲಜನಕದ ಅಣುಗಳಿಂದ ರಚನೆಯಾಗಿದೆ.
A.ಎರಡು
B.ಒಂದು
C.ನಾಲ್ಕು
D.ಮೂರು

Answer:

ಮೂರು

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Q5.10.ಈ ಕೆಳಗಿನವುಗಳಲ್ಲಿ ಯಾವುದು ಆಹಾರ ಸರಪಳಿಗೆ ಒಳಪಡುವುದಿಲ್ಲ.
A.ಹುಲ್ಲು------>ಮಿಡತೆ------>ಹಕ್ಕಿ
B.ಹುಲ್ಲು------>ಮೇಕೆ------->ಮಾನವ
C.ಹುಲ್ಲು------>ಜಿಂಕೆ------>ಸಿಂಹ
D.ಹುಲ್ಲು------>ಮೀನು------>ಮೇಕೆ

Answer:

ಹುಲ್ಲು------>ಮೀನು------>ಮೇಕೆ

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Q6.9.ಆಹಾರ ಸರಪಳಿ ಅಥವಾ ಆಹಾರ(ಪೋಷಣಾ) ಸ್ಥರದಲ್ಲಿ ಶಕ್ತಿಯ ಹರಿವು ______________ .
A.ಏಕಮುವಾಗಿರುತ್ತದೆ
B.ಏಕಮುಖವಾಗಿರುವುದಿಲ್ಲ
C.ನಿರ್ದಿಷ್ಟವಾಗಿದೆ
D.ವಿರ್ದಿಷ್ಟವಾಗಿರುವುದಿಲ್ಲ

Answer:

ಏಕಮುವಾಗಿರುತ್ತದೆ

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Q7.8.___________________ಪರಿಸರ ವ್ಯವಸ್ಥೆಯಲ್ಲಿ ಜೈವಿಕ ಘಟಕವಾಗಿದೆ.
A.ಉಷ್ಣತೆ
B.ಗುಲಾಬಿ ಗಿಡ
C.ಮಣ್ಣು
D.ಮಳೆ

Answer:

ಗುಲಾಬಿ ಗಿಡ

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Q8.7._______________ ಪರಿಸರ ವ್ಯವಸ್ಥೆಯಲ್ಲಿ ಜೈವಿಕ ವಿಘಟಕವಲ್ಲ.
A.ನೀರು
B.ಸೂಕ್ಷ್ಮಾಣುಜೀವಿಗಳು
C.ಸಸ್ಯಗಳು
D.ಪ್ರಾಣಿಗಳು

Answer:

ನೀರು

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