In Class 10 Biology, the chapter 'Our Environment' completely shifts your focus from the tiny cells inside your body to the massive, terrifying, and beautiful natural world outside.
The word Environment refers to absolutely everything that physically surrounds a living organism—including the air it breathes, the water it drinks, and the other animals that try to eat it.
Definition: The physical and biological surroundings in which an organism lives.
Biotic Meaning: All living, biological organisms.
Abiotic Meaning: All non-living, physical and chemical factors.
The Supreme Energy Source: The Sun is the ultimate, massive source of all energy driving the Earth's environment.
Every single forest, ocean, and desert on Earth is made of exactly two distinct components:
When the Biotic (Living) and Abiotic (Non-Living) components aggressively interact and depend on each other in a specific geographical area, they create an Ecosystem.
The most crucial rule of our environment is the violent transfer of energy.
Environment refers to the complete sum of all the living (biotic) and non-living (abiotic) surroundings that constantly affect the life, growth, and survival of an organism.
Biotic components are all living things like plants, animals, and fungi. Abiotic components are all the non-living physical factors like sunlight, wind, soil, and water.
Decomposers (like bacteria) play a massive, critical role. They act as nature's recyclers by completely breaking down dead plants and animals, returning vital nutrients back into the soil.
NADP Full Form — Nicotinamide Adenine Dinucleotide Phosphate
NADP full form is Nicotinamide Adenine Dinucleotide Phosphate. NADPH is produced in photosynthesis light reactions and used in biosynthesis.
Natural Things and Man-Made Things
Learn the difference between natural things (created by nature like trees and sun) and man-made things (created by humans like cars and books).
Nereis — Structure, Classification, and Characteristics
Nereis (Neanthes): phylum Annelida, class Polychaeta. Learn its classification, body structure, parapodia, setae, and importance in biology Class 11.
Net Primary Productivity (NPP) — Definition, Formula, Examples
Net Primary Productivity (NPP): the organic matter available to consumers after plant respiration. NPP = GPP − Respiration. Class 12 CBSE ecology notes.
Nightfall (Nocturnal Emission) — Biology, Causes and Facts
Nightfall (nocturnal emission) is the involuntary ejaculation of semen during sleep. It is a normal biological process caused by testosterone and REM sleep.
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