Basic Concept of Science
A comprehensive exploratory breakdown of foundational principles, etymological roots, pioneering fathers & mothers, core disciplines, and dynamic real-world simulations.
Foundations of Science
What is science at its very core? In everyday language, we often equate science with laboratory test tubes, rockets, or complex formulas. However, science is fundamentally a systematic way of thinking, investigating, and explaining natural reality.
Etymological Origin & Core Definition
Science comes from the Latin word "Scientia", which translates directly to Knowledge.
Formal Definition: Science is the study of the behaviour of nature and the physical world. Any systematic knowledge that is concerned with the physical world and its phenomena is called science.
The Scientific Method in Action
Observation: You notice plants placed beside the sunny window grow tall, while shaded plants wither.
States of Matter & Physical Changes
Current State: Water molecules transition from rigid crystal lattice (Ice) into fluid (Liquid water).
Physics
The King of ScienceIn our classification of natural science, Physics is celebrated as the King of Science (while Mathematics is honored as the Queen). It explores the fundamental rules governing the entire universe from subatomic particles to colliding galaxies.
Core Sub-Branches of Physics:
Study of motion, forces, velocity, friction, and mechanical work.
Study of heat, temperature, thermal equilibrium, and engine cycles.
Electricity, magnetic field interactions, electromagnetic waves, and light.
Behaviour and properties of light, mirrors, lenses, reflection, and refraction.
Study of atomic nuclei, their constituents (protons, neutrons), radioactivity, fission, and fusion.
Newton's 2nd Law of Motion (F = m • a)
Applying 50 N of force to a 5 kg object produces an acceleration of 10.0 m/s².
Galileo's Free Fall & Gravity Law
Dropping an object from a 100m tower on Earth takes 4.52 seconds regardless of its weight.
Gravitational Acceleration in Vacuum
Chemistry
The Central ScienceChemistry forms the crucial bridge connecting physics and biological life. It explains why leaves change colors, how batteries store electricity, and how medicine interacts with human cells.
Key Sub-Branches of Chemistry:
Study of carbon-containing compounds and life-related molecules.
Study of non-carbon substances, minerals, salts, and pure metals.
Thermodynamics, kinetics, and quantum mechanics applied to reactions.
Separation, identification, and quantitative analysis of chemical samples.
Chemical processes occurring within living organisms (enzymes, ATP, DNA, metabolism).
Chemical Bond Formation & Synthesis
Product Formed: Water (H₂O) — Two hydrogen atoms covalently share electrons with one oxygen atom to achieve stability.
pH Scale: Acidity, Neutrality & Alkalinity
Substance: Pure Water — Nature: Neutral (Equal H⁺ and OH⁻ ions)
Biology
The Science of LifeFrom the smallest single-celled amoeba to sprawling ecosystems, Biology investigates the processes, structures, and systems that sustain life.
The branch of biology dedicated to the study of animals, their behaviour, anatomy, and taxonomy.
The branch of biology dedicated to the study of plants, flora, growth, photosynthesis, and metabolism.
Other Vital Branches of Biology:
Microorganisms (bacteria, viruses).
Father: LeeuwenhoekHeredity & variation in genes.
Father: Gregor MendelStructure & function of cells.
Father: Robert HookeOrganisms and their environments.
Ecosystem BalancePhotosynthesis & Sunlight Energy Conversion
Sunlight Level: 50% • Oxygen (O₂) Output: Moderate (15 bubbles/min)
Cell Structure & Organelle Comparison
Plant Cell: Features a rigid cellulose cell wall, green chloroplasts for photosynthesis, and a large central sap vacuole.
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Explore All Notes Class 7th
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