Topics
Matter in Our Surroundings
- Matter
- Characteristics of Particles (Molecules) of Matter
- The Solid State
- The Liquid State
- The Gaseous State
- Plasma
- Bose-einstein Condensate
- Change of State of Matter
- Concept of Melting (Fusion)
- Concept of Boiling (Vaporization)
- Concept of Sublimation
- Concept of Freezing (Solidification)
- Concept of Condensation (Liquefaction)
- Concept of Desublimation (Deposition)
- Concept of Evaporation
Is Matter Around Us Pure
- Matter
- Mixture
- Solutions
- Concentration of a Solution
- Concept of Suspension
- Colloidal Solution
- Evaporation Method
- Centrifugation Method
- Solvent Extraction (Using a Separating Funnel Method)
- Sublimation Method
- Chromatography Method
- Distillation Method
- Fractional Distillation Method
- Crystallisation Method
- Classification of Change: Physical Changes
- Pure Substances
- Elements
- Compound
Atoms and Molecules
- Difference Between Atoms and Molecules
- Law of Conservation of Mass
- Law of Constant Proportions
- Atom
- The Modern Day Symbols of Atoms of Different Elements
- Mass Number (A) or Atomic Mass
- Molecules
- Molecules of Elements
- Molecules of Compounds
- Concept of an Ion
- Writing Chemical Formulae
- Concept of Molecular Mass
- Concept of Molecular Mass
- Mole Concept
- Atoms and Molecules Numericals
Structure of the Atom
- Atom
- Sub-atomic Particles of Atom
- Structure of an Atom
- J. J. Thomson’s Atomic model
- Lord Rutherford’s Atomic model
- Neil Bohr’s Model of Atom
- Concept of Proton
- Neutrons (N)
- Concept of Electron
- Concept of Electrons Distributed in Different Orbits (Shells)
- Valency and Its Types
- Atomic Number (Z)
- Mass Number (A) or Atomic Mass
- Isotopes
- Isobars
- Atoms and Molecules Numericals
The Fundamental Unit of Life
- The Invention of the Microscope and the Discovery of Cell
- Prokaryotic and Eukaryotic Cell
- Osmosis and Osmotic Pressure
- Structure of a Cell
- Plasma Membrane
- Cell Wall - “Supporter and Protector”
- Nucleus - “Brain” of the Cell
- Cytoplasm - “Area of Movement”
- Endoplasmic Reticulum (ER)
- Golgi Apparatus
- Lysosome - “Suicidal Bag”
- Mitochondria - “Power House of the Cell”
- Plastids
- Non-living Substances Or Cell Inclusions
- Difference Between Plant Cell and Animal Cell
- Cell Inclusion
Tissues
Diversity in Living Organisms
Motion
- Motion and Rest
- Distance and Displacement
- Motion and Rest
- Motion Along a Straight Line
- Types of Motion Based on Speed
- Measuring the Rate of Motion - Speed with Direction
- Rate of Change of Velocity
- Distance - Time Graphs
- Distance - Time Graphs
- Velocity - Time Graphs
- Equations of Motion by Graphical Method
- Derivation of Velocity - Time Relation by Graphical Method
- Derivation of Position - Time Relation by Graphical Method
- Derivation of Position - Velocity Relation by Graphical Method
- Types of Motion Based on Speed
- Motion (Numerical)
Force and Laws of Motion
- Force
- Force - Push or Pull
- Force - Push or Pull
- Force - Push or Pull
- Effect of Force
- Effect of Force
- Types of Force: Contact Force
- Types of Force: Non-Contact Force
- Balanced and Unbalanced Forces
- Newton's First Law of Motion
- Inertia and Mass
- Newton's Second Law of Motion
- Newton's Third Law of Motion
- Conservation of Momentum
- Force and Laws of Motion (Numerical)
Gravitation
- Concept of Gravitation
- Newton’s Universal Law of Gravitation
- Free Fall
- To Calculate the Value of G
- Motion of Objects Under the Influence of Gravitational Force of the Earth
- Concept of Mass
- Concept of Weight
- Trust and Pressure
- Buoyancy Force (Upthrust Force)
- Pressure Exerted by Liquids and Gases
- Density of the Fluid
- Archimedes' Principle
- Relative Density
Work and Energy
- Definition of Work
- Work Done by a Constant Force
- Concept of Energy
- Different Forms of Energy
- Types of Mechanical Energy: Kinetic Energy
- Types of Mechanical Energy: Potential Energy
- The Potential Energy of an Object at a Height
- Work Done by a Energy
- Work Done by a Power
- Conversion of One Form of Energy into the Other Form
- Law of Conservation of Energy
- Rate of Doing Work
- Concept of Energy
- Work and Energy (Numericals)
Sound
Why Do We Fall ill
- Health and Its Failure
- The Significance of ‘Health'
- Personal and Community Issues Both Matter for Health
- Distinctions Between ‘Healthy’ and ‘Disease-free’
- Identification of Disease
- Categories of Diseases
- Chronic Diseases and Poor Health
- Causes of Disease
- Infectious and Non-infectious Causes
- Categories of Diseases
- Infectious Agents
- Airborne Diseases Caused by Bacteria
- Diseases Caused by Parasitic Worms
- Diseases Caused by Protozoa
- Modes of Transmission of Diseases (Air, Water, Food, Insects)
- Organ-specific and Tissue-specific Manifestations of Disease
- Principles of Prevention of Diseases
- Principles of Treatment of Diseases
Our Environment
- The Environment
- The Breath of Life - Air
- The Role of the Atmosphere in Climate Control
- Movements of Air (Winds) and Its Role in Bringing Rains Across India
- Water - A Wonder Liquid
- Water Pollution
- Mineral Riches in the Soil
- Biogeochemical Cycle
- The Water-cycle
- The Nitrogen-cycle
- The Carbon Cycle
- The Oxygen-cycle
- Ozone Layer Depletion
Improvement in Food Resources
notes
Motion Along a Straight Line:
When an object moves along a straight line, the motion of the object is called rectilinear motion. For example; motion of a car on highway.
Let A, B and C represent the position of the object at different instants. At first, the object moves through C and B and reaches A. Then it moves back along the same path and reaches C through B.
The total path length covered by the object is OA + AC, that is 60 km + 35 km = 95 km. This is the distance covered by the object.
Distance is not dependent upon the direction of the motion.
For motion of the object from O to A, the distance covered is 60 km and the magnitude of displacement is also 60 km. During its motion from O to A and back to B, the distance covered = 60 km + 25 km = 85 km
while the magnitude of displacement = 35 km. Thus, the magnitude of displacement (35 km) is not equal to the path length (85 km). Further, we will notice that the magnitude of the displacement for a course of motion may be zero but the corresponding distance covered is not zero. If we consider the object to travel back to O, the final position concides with the initial position, and therefore, the displacement is zero. However, the distance covered in this journey is OA + AO = 60 km + 60 km = 120 km.
Thus, two different physical quantities — the distance and the displacement, are used to describe the overall motion of an object and to locate its final position with reference to its initial position at a given time.