NCERTCh 13Free

Our Environment

🎓 Class 10📖 Science📖 11 notes🧠 15 Q&A⏱️ ~17 min

Our EnvironmentStudy Notes

NCERT-aligned · 11 notes · 3 shown free

Our Environment

Explanation

Our Environment

The term 'environment' is frequently used in everyday language, media, and discussions, often highlighting concerns about its current state compared to the past. Environment refers to the surroundings in which we live, encompassing all living (biotic) and non-living (abiotic) components that influence us directly or indirectly. These components interact continuously, maintaining a delicate balance essential for life. Understanding the environment involves studying these interactions and recognizing human impact on natural systems. This chapter focuses on the components of the environment, their interactions, and the consequences of human activities on ecological balance.

  • Environment includes all living (biotic) and non-living (abiotic) components around us.
  • Interactions among these components maintain natural balance.
  • Human activities influence and alter environmental conditions.
  • Understanding environment is key to addressing ecological issues.
  • 📌 Environment: The surroundings in which living organisms exist, including biotic and abiotic components.
  • 📌 Biotic components: Living organisms such as plants, animals, and microorganisms.
  • 📌 Abiotic components: Non-living physical factors like temperature, rainfall, wind, soil, and minerals.

13.1 ECO-SYSTEM — WHAT ARE ITS COMPONENTS?

Explanation

13.1 ECO-SYSTEM — WHAT ARE ITS COMPONENTS?

An ecosystem is a functional unit of nature where living organisms (plants, animals, microorganisms) interact with each other and with the physical environment (air, water, soil, sunlight). It consists of biotic components (living organisms) and abiotic components (non-living physical factors such as temperature, rainfall, wind, soil, and minerals). These components interact to maintain ecological balance. For example, a garden with various plants and animals forms an ecosystem where biotic and abiotic factors influence growth, reproduction, and survival. Ecosystems can be natural, like forests, ponds, and lakes, or human-made, such as gardens and crop fields. Understanding ecosystems helps us appreciate the interdependence of organisms and their environment.

  • Ecosystem includes both biotic (living) and abiotic (non-living) components.
  • Interactions among these components maintain natural balance.
  • Examples of natural ecosystems: forests, ponds, lakes.
  • Examples of human-made ecosystems: gardens, crop fields.
  • Abiotic factors influence the activities and survival of organisms.
  • 📌 Ecosystem: A community of living organisms interacting with non-living components in a specific area.
  • 📌 Biotic components: Living organisms in an ecosystem.
  • 📌 Abiotic components: Physical and chemical factors affecting organisms.

Producers, Consumers and Decomposers

Explanation

Producers, Consumers and Decomposers

Organisms in an ecosystem can be categorized based on their mode of obtaining food into producers, consumers, and decomposers. Producers, mainly green plants and certain bacteria, synthesize organic compounds like sugars and starch from inorganic sub

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

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

Answer:

Fossil fuels

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

Answer:

ಕಾಗದದ ಲೋಟ

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

Answer:

ಮೂರು

MediumNCERT
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

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

Answer:

ಏಕಮುವಾಗಿರುತ್ತದೆ

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

Answer:

ಗುಲಾಬಿ ಗಿಡ

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

Answer:

ನೀರು

MediumNCERT