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Biodiversity

Learning Outcomes  👉 What is biodiversity  👉 Origin of biodiversity  👉 Nature of biodiversity  👉 Interrelationships of organisms  👉 How to measure biodiversity  👉 Biodiversity of Bangladesh  👉 Risks and remedies of biodiversity  What is Biodiversity? The term biodiversity describes the great variety of life on Earth. Biodiversity refers to the variety of living things, including plants, animals, and microorganisms. We don't know for sure exactly how many different organisms there are on Earth. However, scientists estimate that there are about 8-14 million (80 to 140 lakh) different species of organisms on this Earth. Some believe that the number is higher. But whatever the number, most of these organisms are unknown to us. Only 1.2 million (12 lakh) species have been identified and described so far, most of which are insects. This means that billions of other organisms are still mysterious and unknown to us. Origin of Biodiversity The unique characteristics of all sp

SSC Physics

Physics Note


Secondary Physics

Physical Quantities and Their Measurements

  • Physical Quantities and Their Measurements
  • Measuring Instruments

Motion

  • Rest and Motion
  • Different Types of Motion
  • Scalar and Vector quantities
  • Distance and Displacement
  • Speed and Velocity
  • Acceleration and Deceleration or Retardation
  • Equation of Motion
  • Laws of Falling Bodies

Force

  • Inertia of Concept of Force - Newton's First Law
  • Nature of Fundamental Forces
  • Balanced and Unbalanced Forces
  • Momentum
  • Collision
  • Effect of Force on Motion: Newton's Second Law
  • Gravitational Force
  • Newton's Third Law
  • Frictional Force

Work, Power, and Energy

  • Energy
  • Different forms of Energy
  • Sources of Energy
  • Conservation and Transformation of Energy
  • Relation between mass and Energy
  • Power

State of Matter and Pressure

  • Pressure
  • Density
  • Pressure in liquids
  • Air Pressure
  • Elasticity
  • Three States of Matter: Solid, Liquid, and Gas

Effect of Heat on Matter

  • Heat and Temperature

  • Thermometric Properties of matter

  • Thermal Expansion of Matter

  • Effect of Temperature on Change of State

  • Specific Heat

  • Fundamental Principles of Calorimetry

  • Effect of Pressure on Melting Point and Boiling Point

Waves and Sound

  • Simple Harmonic Motion
  • Waves
  • Sound Wave
  • Sound Pollution

Reflection of Light

  • Nature of Light
  • Reflection
  • Mirror
  • Spherical Mirror
  • Convex Mirror
  • Concave Mirror
  • Magnification
  • Uses of Mirror

Refraction of Light

  • Refraction of Light
  • Total Internal Reflection
  • Uses of refraction
  • Types of Lenses
  • The function of the Eye
  • Perceptions of Colored Objects

Static Electricity

  • Charge
  • Static Electricity by Friction
  • Electrical Induction
  • Electric Force
  • Electric Field
  • Electric Potential
  • Capacitor
  • Uses of Static Electricity

Current Electricity

  • Electric Current
  • Relationship between Potential Difference and Electricity
  • Electric Power
  • Electric Supply
  • Safe Use of Electricity
  • Design of Circuit in Residence

Magnetic Effects of Current

  • Magnet
  • Magnetic Effects of Current
  • Electromagnetic Induction

Modern Physics and Electronics

  • Radioactivity
  • Development of Electronics
  • Analog and Digital Electronics
  • Semiconductor
  • Information and Communications Technology
  • Internet and E-mail
  • Effective Use of ICT

Physics to Save Life

  • Background of Biophysics
  • Contributions of Jagadish Chandra Bose
  • Human Bodies and Machines
  • Diagnostic Instruments
  • Physics in Treatment

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