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Why is biology divided into the physical and applied branches?

Why is biology divided into the physical and applied branches? In biology, living organisms, including their structure, function, growth, reproduction, classification, origin, and evolution are discussed. Biology also teaches how to use this knowledge to improve human life. To discuss this knowledge in detail, biology has been divided into two branches. one is physical biology in which theoretical concepts are discussed, and the other is applied biology in which the way of using theoretical knowledge is discussed. Actually, for learning and using knowledge easily and effectively, biology is divided into these two parts.

Physical Quantities and Their Measurements


Chapter - 1: Physical Quantities and Their Measurements

👉 All Chapter Contents 👈 

1.1 Physics
Name of the physicist or thinker
Thales (624BC - 569 BC)
Prediction regarding solar eclipse
Concept of magnetic properties  of loadstone
Pythagoras (527 BC- 497 BC)
Invention of a number of geometric theorem.
Research works on vibrating string which is used even in the present scales of musical instrument.  

1.4 Objectives of Physics
1.5 Physical Quantities and Their Measurements
1.6 Measuring Instruments
1.7 Error and Accuracy

Question Bank

1.1 Physics

  • What is physics?
  • Describe the scope of physics.
  • What is the main goal of physics?
  • What are the branches of physics?
  • Who is famous for solar eclipse predictions?

1.2 Scope of Physics

  • Describe the scope of physics.
  • What is classical physics?
  • What is modern physics?

1.3 Development of Physics

  • Who is famous for solar eclipse predictions?
  • What does the word atom mean?
  • Who says the matter has an inseparable unit?
  • What is the contribution of Archimedes to physics?
  • What did Hygen contribute to physics?
  • Who wrote the encyclopedia about the history of nature?
  • Who is the proponent of the experimental scientific method?
  • Who made the model of the aircraft?
  • Why is Dr. Gilbert so memorable?
  • Who discovered the law of refraction of light?
  • What did Hygen contribute to physics?
  • Who invented the air pump?
  • Who measures the speed of light?
  • Who presented the idea of solar-centric theory?
  • What did Kepler say about the direction of the sun?
  • Write Galileo's contribution to physics?
  • Write Newton's contribution to physics.
  • Who invented calculus?
  • Why did the Industrial Revolution take place in Europe in the eighteenth century?
  • Who shows that electric current has a magnetic action?
  • Explain logically that the wonderful advances in physics have taken place in the twentieth century.
  • The nucleus is fissionable, who said in what year?
  • What happens as a result of nuclear fission?
  • Who provides the theory of relativity?
  • Who presented clear proof of Plank's quantum theory?
  • Which scientist has been awarded the Nobel Prize for his outstanding contribution to the discovery of the weakest force in the aggregation of fundamental forces?
  • Explain the discovery of physics has changed our way of life.

1.4 Objective of Physics

  • Describe the objective of physics.
  • Physics reveals the mysteries of nature - explain.
  • Physics describes the laws of nature - explain.
  • Technology improves by following the basic principles of physics - explain.

1.5 Physical Quantities and Their Measurements

  • What do you mean by quantity?
  • What are fundamental quantities?
  • Write all the fundamental quantities.
  • What are derived quantities?
  • Write some examples of derived quantities.
  • Proof that force is a derived quantity.
  • Why acceleration is a derived quantity?
  • Write differences between fundamental and derived quantities.
Units of Measurement
  • What is the unit of measurement?
  • What is an SI unit?
  • Why is a unit needed to express the measure of a quantity?
  • Write the definition of all fundamental quantities.
  • What is meter
  • What is a kilogram?
  • What is an ampere?
  • Write the symbol of a unit of fundamental quantities.
  • 1 nanosecond is equal to how many seconds?
  • How many meters is equal to 1 petameter?
  • What is a scientific symbol?
  • Express the number 0.0000000005687 in a scientific way.
  • Express the number 265945665665 in a scientific way.
  • Explian the advantages of the scientific method of numbers.
  • What is a dimension?
  • Determine the dimension of force?
  • Why it is necessary to know the level equations of different quantities?
Scientific symbols and notations
  • What are the methods to follow to write the symbol of units and different numbers?
  • Explain the reasons for using scientific symbols and prefixes.

1.6 Measuring Instruments

  • What is a meter scale?
  • How to measure with a meter scale?
  • What is the vernier constant?
  • How to determine the vernier constant of slide calipers?
  • What is vernier coincidence?
  • What does vernier coincidence 7 meant?
  • Why is the vernier scale used with the main scale?
  • Write the requirements of the vernier scale for precise and accurate measurements.
  • What are slide calipers?
  • How to determine the diameter of a cylinder with the help of slide calipers?
  • Describe how to determine the size of a cylinder using a slide caliper.
  • Describe the need for slide calipers for fine measurement.
  • What is a screw gauge?
  • How to measure by screw gauge?
  • What is pitch?
  • What is the least count?
  • How to determine the least count?
  • What is a stopwatch?
  • How to measure time with the help of a stopwatch?
  • Mathematical Problems:
    • Will be added...

1.7 Error and Accuracy

  • How many types of errors are usually seen during the measurement?
  • Explain the random error.
  • What is meant by mechanical error?

Secondary Physics


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