Our Environment Class 10 Notes CBSE Science Chapter 15
CBSE NCERT Class 10 Notes Science contains physics, chemistry and biology notes of chapter 15 Our Environment topics given in textbook are part of Revision Notes for Class 10
Read also CBSE Class 10 Chapter-wise Science Notes
According to new CBSE Exam Pattern, Short Answer typ questions and MCQs Science is one of the important subject of class 10th of the CBSE because it is a crucial sub-subject of Science
Here we have given NCERT Science
According to new CBSE Exam PatternScience Notes cover an overview of the main given points of every concepts and Topics in the NCERT TextBooks Class 10th Science this Chapter Notes includes topic/concepts wise explanations for all the topic provided in the book such as Biomagnification , Accumulation, Pesticides, Ozone depletion, Waste , Components of Ecosystem , biodegradable and non biodegradable, Environment, Wastes , Biotic components, ozone layer depletion., Trophic level, Bioaccumlation , food chain and Efforts to Protect Environment
Well prepared Class 10th Science Notes will guidance students understand the topics ,concepts and themes covered in all the chapters of Ncert Text book of 10th
Our Environment
-All biological (plants, animals, micro-organisms etc.) and physical (Soil,
Water, air, sunlight etc.) Surroundings around us create our environment.
ving constituents
All interacting organisms in an area together with no of the environment form an ecosystem.
Types of Ecosystem
-It exists in nature without any human interference
Example - Pond, River,
Made by humans for their own interest Example Aquarium, Garden
Components of Ecosystem
Biotic Components
Abiotic components [Non-living components]
[living components]
All the living organism of a
certain area like plants, animals
humans, microbes etc.
-All climatic factors like rain,
humidity, temperature inorganic
substances like oxygen, nitrogen
etc.
Producers
Consumers
Decomposers
Careers
Producers
aura Organism which prepare their own food from simple inorganic substances like carbon dioxide and water by using sunlight energy in the presence of chlorophyll
Ex. Green plants and certain blue-green algae
Consumers
Those organism which consume food prepared by producers are called
Consumers
Herbivores
Carnivores
Omnivores
Those animals which eats only plants
Those animals which eats only other
-Those animals which eats both plants and
animals as food.
animals.
-Ex. Goat, Sheep etc.
Ex Lion, Tiger etc.
-Ex. Man, Dog
Decomposers
Micro-organism that break down the complex organic compounds present in dead organism into simpler substances. Su
-Ex. Certain bacteria and Gaur
Food Chain
The flow of nutrients and energy from one organism to another at different trophic levels forms a food chain.
-Food chain represents a single unidirectional transfer of energy.
- Food chain starts with producer.
5
Food Chain(producer)
Grasshopper -10-10-10 (Herbivore)
(Carnivores)
A food chain shows how energy moves from plants te animals
Eagle (Top carnivore)
Food Web Gaurd
-Several Interconnected food chains forms a food web Single food chain doesn't naturally occur in an ecosystem.
Cottom
waven
Trophic Levels
The various steps in a food chain at which the transfer of food (or energy) takes place are called trophic levels
Plant
Insect
Frog
Eagle
There are generally a greater number of individuals at the lower trophic levels of ecosystem, the greatest number is of producers
The energy transfer is never 100% Thus, each successive trophic level receives lesser energy than previous resulting in a pyramid sh
Percent Law
Only 10 percent of the energy entering a particular trophic level of organisms is available for transfer to the next higher trophic level.
1%
10%
Deer
10 J
13
10%
Energy Pyramid
Bioaccumulation
Bioaccumulation refers to the accumulation of a toxic chemical in the tissue of a particular organism. It occurs in a single organism over lifetime
Biomagnification
Biomagnification refers to the increase in concentration of harmful chemical substances in the body of living organism at each trophic levels of a food chain.
It expands over different trophic levels.
Organisms at the higher trophic levels have higher concentration of such chemicals
Eg. In the below case, man will have the highest amount of pesticides
Pesticides
plants
Herbivore
Man
Soil
Ozone Layer Depletion
How Do our Activities Affect the Environment
Ozone molecule is (0.) fa atoms of oxygen combined together
Ozone layer protects the life on earth from harmful ultraviolet radiations coming from sun.
Ultraviolet rays can cause skin cancer.
How Ozone is formed:
- Ozone is formed high up in the atmosphere by the action of ultraviolet radiation on oxygen gas.
UV (Ozone)
-Chlorofluorocarbon (CFC) is one of the major chemicals that deplete the ozone layer. CFC is found in coolant, fire extinguisher etc.
- In 1987, United Nations Environment Programme (UNEP) forged an agreement among its member countries to freeze CFC production.
Managing the Garbage we produce
Waste Biodegradable
Wastes that can be broken down by biological processes.
Ex. Vegetable waste, paper cups, Kulhad
etc.
Non-Biodegradable
Wastes that can't broken down by biological processes
- Ex. Polythene bags. Glass etc.
Management aura
These are Landfills, Incineration, Composting, Sewage treatment, Recycling etc.
Efforts on Individual Level
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Importance of Class 10th Science Notes
The 10th grade includes the three branches of Science: Physics, Chemistry, and Biology, which are consolidated into a single textbook. This subject is conceptually dense, and achieving high marks requires a clear understanding of these concepts. To facilitate this, we offer easy-to-follow and detailed Class 10 Science Notes, which will aid in comprehending the material and answering exam questions. Additionally, the NCERT Science Revision Notes contain important points for quick review, allowing for efficient chapter comprehension. Simply select your desired chapter from the list below.
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