Science 9

1. Measurement 4 Minutes

2. Physical Quantities (fundamental and derived) 8 Minutes

3. Units 6 Minutes

4. Characteristics of Units 8 Minutes

5. Standard system of units and advantages of S.I. unit 11 Minutes

6.Fundamental units and derived unit 16 Minutes

7. Example 1 of units 2 Minutes

1. Force 3 Minutes

2. Effects of Force 8 Minutes

3. Balanced and Unbalanced forces 6 Minutes

4. Distance travelled and displacement 10 Minutes

5. Speed 6 Minutes

6. Velocity 4 Minutes

7. Uniform and non-uniform Velocity 4 Minutes

8. Average velocity 4 Minutes

9. Acceleration 10 Minutes

10. Use of graphs in physics 18 Minutes

11. Equation of motion (first equation) 9 Minutes

12. Equation of motion(Second equation) 8 Minutes

13. Equation of motion(Third equation) 9 Minutes

14. Equation of motion(Fourth equation) 10 Minutes

1. Simple machines 3 Minutes

2. Advantages of simple machines 2 Minutes

3. Mechanical Advantage 2 Minutes

4. Velocity Ratio 5 Minutes

5. Efficiency 7 Minutes

6. Ways to increase efficiency of a machine 3 Minutes

7.Relationship between MA, VR and efficiency 5 Minutes

8.Principles of simple machines 5 Minutes

9.Lever 5 Minutes

10.Problem 1 (MA, VR and η of a lever) 12 Minutes

11.Pulley 7 Minutes

12.Problem 1 (MA, VR and η of a pulley) 8 Minutes

13.Inclined plane 4 Minutes

14.Problem 1 (MA, VR and η of a inclined plane) 3 Minutes

15.Wheel and axle 6 Minutes

16.Problem 1 (Ma, VR and η of a wheel and axle) 5 Minutes

17.Wheel and axle as a continuous lever 3 Minutes

18.Screw and wedge wala video 6 Minutes

19.Moment of force 8 Minutes

20.Mathematical description of moment of force 18 Minutes

21.Law of moment 6 Minutes

22.Problem 1 (Law of moment) 9 Minutes

23.Problem 2 (Law of moment) 6 Minutes

1. Work 13 Minutes

2. Definition of one joule work 4 Minutes

3. Work against friction 5 Minutes

4. Example 1 (Work done against friction) 4 Minutes

5. work against gravity 4 Minutes

6. Problem 1 5 Minutes

7. Energy 10 Minutes

8. Mechanical energy 9 Minutes

9. Example 1(Kinetic energy) 3 Minutes

10. Problem 2(Kinetic energy) 8 Minutes

11. Potential energy 7 Minutes

12. Example 1(Potential energy) 6 Minutes

13. Electrical energy 5 Minutes

14. Heat energy 6 Minutes

15. Light energy 2 Minutes

16. Sound energy 4 Minutes

17. Magnetic energy 3 Minutes

18. Chemical energy 3 Minutes

19. Nuclear energy 5 Minutes

20. Relation between work and energy 7 Minutes

21. Power 5 Minutes

22. What is one watt power 5 Minutes

23. Example 1(Power) 4 Minutes

1. Introduction to sound 4 Minutes

2. Properties of sound wave 5 Minutes

3. Sound wave 8 Minutes

4. Wave motion and some terms related to wave motion 14 Minutes

5. Relationship between time period and frequency 4 Minutes

6. Problem 1 (Wave motion) 2 Minutes

7. Problem 2 (Wave motion) 3 Minutes

8. Problem 3 (Wave motion) 7 Minutes

9. Speed of sound in different media at 0 degree C 6 Minutes

10. Factors effecting speed of sound in a gas medium 7 Minutes

11. Problem 1 (Factors effecting speed of sound) 4 Minutes

12. Audibility 8 Minutes

13. Applications of ultrasound 4 Minutes

14. Characteristics of notes(Pitch) 7 Minutes

15. Characteristics of notes(Intensity of sound) 10 Minutes

16. Average intensity level 5 Minutes

17. Factors effecting intensity of sound 3 Minutes

18. Characteristics of notes(Quality) 3 Minutes

19. Reflection of sound 2 Minutes

20. Echo 6 Minutes

21. Reverberation 4 Minutes

22. Refraction of sound 7 Minutes

23. Noise and music 2 Minutes

1. Light energy 4 Minutes

2. Refraction of light 5 Minutes

3. Optical medium 10 Minutes

4. Laws of refraction of light(First law) 4 Minutes

5. Laws of refraction of light(Second law) 7 Minutes

6. Problem 1 (Refraction of light) 3 Minutes

7. Problem 2 (Refraction of light) 5 Minutes

8. Examples of refraction of light 13 Minutes

9. Why does path of light bend (put question mark here) 12 Minutes

10. Real depth and apparent depth 4 Minutes

11. Example 1 (Real depth and apparent depth) 2 Minutes

12. Critical angle 7 Minutes

13. Example 1 (Critical angle) 5 Minutes

14. Total internal reflection 9 Minutes

15. Example 1 (Total internal reflection) 4 Minutes

16. Why diamonds shine but glass or water doesnot(put question mark here) 7 Minutes

17. Prisms 14 Minutes

18. How rainbow is formed in the atmosphere(put question mark here) 10 Minutes

19. Electromagnetic spectrum 16 Minutes

20. Visible and infrared light 10 Minutes

21. Radio waves and ultraviolet radition 6 Minutes

22. X-rays 4 Minutes

1. Electrical energy 4 Minutes

2. Electric current 6 Minutes

3. Electromotive force and potential difference 8 Minutes

4. Electric resistance 6 Minutes

5. Conductors, Semi-conductors and insulators 5 Minutes

6. Factors effecting resistance in metals 6 Minutes

7. Resistance formula 8 Minutes

8. Ohm's law 9 Minutes

9. Problem 1 7 Minutes

10. Problem 2 9 Minutes

11. Problem 3 5 Minutes

12. Problem 4 9 Minutes

13. Magnet 6 Minutes

14. Properties of magnetic lines of forces 5 Minutes

15. Neutral point 5 Minutes

16. Terrestrial magnetism 7 Minutes

17. Magnetic elements of the earth's magnetic field 10 Minutes

1. Pure substance and impure substance 8 Minutes

2. Elements 8 Minutes

3. Metals, non metals and metalloids 6 Minutes

4. Compounds 5 Minutes

5. Molecule 4 Minutes

6. Atom 6 Minutes

7. Shells, subshells and orbitals 15 Minutes

8. 3D Visualisation of Shells, subshells and orbitals 10 Minutes

9. Electronic configuration 14 Minutes

10. Aufbau principle 9 Minutes

11. Valence shell and valence electrons 3 Minutes

12. Information from valence electrons 4 Minutes

13. Valency 5 Minutes

14. Variable valency 4 Minutes

15. Radicals 5 Minutes

16. Valency of electropositive radicals 4 Minutes

17. Valency of electronegative radicals 3 Minutes

18. Ions 6 Minutes

19. Inert gases 8 Minutes

20. Duplet rule and octet rule 19 Minutes

21. Chemical bonding 5 Minutes

22. Electrovalent bond 8 Minutes

23. Example of electrovalent bond(Magnesium chloride) 4 Minutes

24. Characteristics of electrovalent bond 4 Minutes

25. Covalent bond 14 Minutes

26. Characteristics of covalent compounds 4 Minutes

27. Molecular formula of compounds and elements 4 Minutes

28. Infomation given by a molecular formula 4 Minutes

29. Steps of writing molecular formula of compounds 13 Minutes

1. Physical change and chemical change 7 Minutes

2. Chemical reaction 6 Minutes

3. Chemical equation 8 Minutes

4. Drawbacks of skeletal chemical equation 3 Minutes

5. Writing and balancing chemical equations 17 Minutes

6. Information conveye by a balanced chamical equation 4 Minutes

7. Limitations of chemical equations 7 Minutes

8. Endothermic and exothermic reaction 6 Minutes

9. Catalyst 4 Minutes

10. Characteristics of catalyst 4 Minutes

1. Solution 6 Minutes

2. Unsaturated and saturated solution 5 Minutes

3. Supersaturated solution 4 Minutes

4. Importance of solution 3 Minutes

5. Solubility of a substance 6 Minutes

6. Effect of heat on solubility 3 Minutes

7. Solubility curve 4 Minutes

8. Crystals 2 Minutes

9. Characteristics of crystals 2 Minutes

10. Crystallization 3 Minutes

11. Problem 1 3 Minutes

12. Problem 2 7 Minutes

13. Problem 3 12 Minutes

1. Atmosphere 5 Minutes

2. Hydrogen gas 5 Minutes

3. General methods of preparation for hydrogen gas 9 Minutes

4. Laboratory preparation of hydrogen gas 11 Minutes

5. manufacture of hydrogen 4 Minutes

6. Nascent hydrogen 2 Minutes

7. Physical properties of hydrogen gas 4 Minutes

8. Chemical properties of hydrogen gas 13 Minutes

9. Uses of hydrogen gas 3 Minutes

10. Oxygen 7 Minutes

11. General methods of preparation of oxygen gas 3 Minutes

12. Laboratory preparation of oxygen gas (With heat) 6 Minutes

13. Laboratory preparation of oxygen gas (Without using heat) 5 Minutes

14. Test of oxygen gas 3 Minutes

15. Manufacture of oxygen gas 2 Minutes

16. Physical properties of oxygen gas 4 Minutes

17. Chemical properties of oxygen gas 12 Minutes

18. Uses of oxygen gas 3 Minutes

19. Nitrogen 7 Minutes

20. General method of preparation of nitrogen gas 3 Minutes

21. Laboratory preparation o nitrogen gas 7 Minutes

22. Test of nitrogen gas 2 Minutes

23. Manufacture of nitrogen gas 2 Minutes

24. Physical properties of nitrogen gas 3 Minutes

25. Chemical properties of nitrogen gas 5 Minutes

26. Uses of nitrogen gas 4 Minutes

1. Metals 5 Minutes

2. General properties of metals 11 Minutes

3. Alloy 5 Minutes

4. Electron sea model of metals 7 Minutes

5. Some questions answered by electron sea model 6 Minutes

6. Chemical properties of metals 6 Minutes

7. Metalloids 3 Minutes

8. Role of metals for organisms 7 Minutes

9. Importance of zinc 4 Minutes

10. Importance of sodium and potassium 4 Minutes

11. Harmful effects pf mercury 3 Minutes

12. Harmful effects of lead 5 Minutes

1. Carbon in common materials 5 Minutes

2. Sources of carbon 5 Minutes

3. Nature of carbon 6 Minutes

4. Allotropy of carbon 7 Minutes

5. Diamond 4 Minutes

6. Uses of diamond 1 Minutes

7. Graphite 4 Minutes

8. Uses of graphite 2 Minutes

9. Chemical properties of carbon 7 Minutes

10. Organic and inorganic compounds 4 Minutes

1. Sources of water 8 Minutes

2. Sources of ground water 4 Minutes

3. Physical properties of water 10 Minutes

4. Capillary action 3 Minutes

5. Chemical properties of water 8 Minutes

6. Solvent property of water 8 Minutes

7. Uses of water 3 Minutes

8. Types of water 2 Minutes

9. Why does hard water not form lather easily (put question mark here) 4 Minutes

10. Types of hard water 2 Minutes

11. Temporary hardness and its removal 5 Minutes

12. Permanent hardness of water and its removal 4 Minutes

13. Permutits process 5 Minutes

14. Advantages and disadvantages of hard water 2 Minutes

1. Fertilizers 3 Minutes

2. Organic fertilizers 4 Minutes

3. Advantages of organic fertilizers 2 Minutes

4. Disadvantages of organic fertilizers 2 Minutes

5. Inorganic fertilizers 5 Minutes

6. Phosphorus fertilizers 5 Minutes

7. Potassium fertilizers 4 Minutes

8. Types of chemical fetilizers 4 Minutes

9. Advantages of chemical fertilizers 2 Minutes

10. Disadvantages of chemical fertilizers 2 Minutes

11. Precautions while using chemical fertilizers 4 Minutes

12. Difference between organic fertilizers and inorganic fertilizers_1 2 Minutes

1. Classification of plants and animals 4 Minutes

2. Importance of classification 5 Minutes

3. Heirarchy of classification 8 Minutes

4. Nomenclature 6 Minutes

5. Five-kingdom system of classification 7 Minutes

6. Kingdom(put colon here) Monera 4 Minutes

7. Kingdom(put colon here) Protista 4 Minutes

8. Kingdom(put colon here) Plantae 3 Minutes

9. Kingdom(put colon here) Fungi 3 Minutes

10. Kingdom(put colon here) Animalia 4 Minutes

11. Kingdom(put colon here) Plantae and its divisions 3 Minutes

12. Division(put colon here) Algae 5 Minutes

13. Division(put colon here) Bryophyta 4 Minutes

14. Division(put colon here) Tracheophyta and its sub-division Pteridophyta 8 Minutes

15. Sub-division(put colon here) Gymnosperms 4 Minutes

16. Sub-division(put colon here) Angiosperms 5 Minutes

17. Class(put colon here) Monocotyledons 5 Minutes

18. Class(put colon here) Dicotyledons 6 Minutes

19. Way of writing classification of plants 10 Minutes

20. Kingdom(put colon here) Animalia 5 Minutes

21. Phylum(put colon here) Porifera 8 Minutes

22. Phylum(put colon here) Coelenterata 6 Minutes

23. Phylum(put colon here) Platyhelminthes 5 Minutes

24. Phylum(put colon here) Nemathelminthes 6 Minutes

25. Phylum(put comma here) Annelida 5 Minutes

26. Phylum(put comma here) Arthropoda 10 Minutes

27. Phylum(put comma here) Mollusca 4 Minutes

28. Phylum(put comma here) Echinodermata 4 Minutes

29. Phylum(put comma here) Chordata 9 Minutes

30. Sub-phylum(put comma here) Vertebrata 6 Minutes

31. Class(put comma here) Pisces 4 Minutes

32. Class(put comma here) Amphibian 4 Minutes

33. Class(put comma here) Reptilia 4 Minutes

34. Class(put comma here) Aves 5 Minutes

35. Class(put comma here)Mammals 10 Minutes

36. Classification of Animals 17 Minutes

37. Mosquito 6 Minutes

38. Structure of mosquito 5 Minutes

39. Difference between Male and Female 2 Minutes

40. Lifecycle of a mosquito 3 Minutes

41. Larva of mosquito 5 Minutes

42. Papa of mosquito 3 Minutes

43. Adult stage of mosquito 5 Minutes

44. Disadvantage of mosquito 6 Minutes

45. Control measure of mosquito 5 Minutes

1. Adaptation 6 Minutes

2. Aquatic adaptation 6 Minutes

3. Adaptive characteristics of hydrophytes 5 Minutes

4. Aquatic animals and their adaptive characteristics 8 Minutes

5. Terrestrial animals 5 Minutes

6. Xerophytes and their adaptational characteristics 5 Minutes

7. Terrestrial animals and their adaptational characteristics 4 Minutes

8. Fossorial and arboreal animals and their adaptational characteristics 4 Minutes

9. Aerial and desert animals and their adaptational characteristics 6 Minutes

10. Microorganisms 3 Minutes

11. A. Bacterias 7 Minutes

12. Types of bacterias 6 Minutes

13. Advantages of bacterias 4 Minutes

14. Disadvantages of bacterias and control measures of bacterial diseases 6 Minutes

15. B. Fungi 5 Minutes

16. Advantages of fungi 4 Minutes

17. Disadvantages of fungi and control measures of fungi 5 Minutes

18. C. Viruses 5 Minutes

19. Characteristics of viruses 6 Minutes

20. Advantages of virus 4 Minutes

21. Disadvantages and control measures of virus 4 Minutes

22. D. Protozoans 5 Minutes

23. Control measures of protozoans 2 Minutes

1. Plant tissue 5 Minutes

2. Lateral meristem and intercalary meristem 4 Minutes

3. Permanent tissue 5 Minutes

4. Collenchyma and sclerenchyma 5 Minutes

5. Complex permanent tissues 5 Minutes

6. Special permanent tissues 5 Minutes

7. Human skeleton system 6 Minutes

8. Structure of a bone 5 Minutes

9. Types of skeleton 11 Minutes

10. Axial skeleton (Cranium and facial bones) 10 Minutes

11. Cranium and facial bones demonstration 11 Minutes

12. Ear Ossicles 5 Minutes

13. Bones of trunk (Thoracic bones and Vertebral bones) 8 Minutes

14. Appendicular skeleton (Bones of upper extremity) 7 Minutes

15. Bones of lower extremity 7 Minutes

16. Functions of skeleton system 4 Minutes

17. Digestive system 4 Minutes

18. Digestion in human body 6 Minutes

19. Digestion in duodenum and small intestine 6 Minutes

20. Summary of digestivive system 5 Minutes

21. Importance of digestive system 2 Minutes

22. Respiratory system 4 Minutes

23. Different organs involved in respiration 5 Minutes

24. Lungs and diaphragm 6 Minutes

25. The process of respiration 2 Minutes

26. Importance of respiratory system 3 Minutes

27. Urinary system 2 Minutes

28. Organs involved in urinary system 4 Minutes

29. Importance of excretory system 2 Minutes

1. Sense organs 2 Minutes

2. The eye 8 Minutes

3. Middle layer of an eye 9 Minutes

4. Inner layer of an eye 4 Minutes

5. Lens 3 Minutes

6. Working of the human eye 4 Minutes

7. Care and protection of eye 3 Minutes

8. Ear (Outer ear) 5 Minutes

9. Middle ear 4 Minutes

10. Inner ear 4 Minutes

11. Working mechanism of the ears 3 Minutes

12. Care and protection of ears 4 Minutes

13. Tongue 6 Minutes

14. Care and protection of the tongue 2 Minutes

15. The skin 6 Minutes

16. Care and protection of the skin 2 Minutes

17. Nose 4 Minutes

18. Care and protection of the nose 3 Minutes

1. Evolution 9 Minutes

2. Organic evolution 2 Minutes

3. Evidence from fossils or paleontological evidence 6 Minutes

4. Evidence from comparative morphology and anatomy 9 Minutes

5. Evidence from embryo or embryological evidence 4 Minutes

6. Evidence from geographical distribution of organanisms 3 Minutes

7. Evidence from brodge animals(Connecting animals) 5 Minutes

8. Theories of evolution 3 Minutes

9. Use and disuse or organs and inheritance or acquired characters 7 Minutes

10. Criticism of Lamarkism 3 Minutes

11. Darwin's theory or Darwinism 6 Minutes

12. Variation and heredity and Natural selection 5 Minutes

13. Origin of species or speciation 6 Minutes

14. Criticism of Darwinism 6 Minutes

15. A comparison of Lamarkism and Darwinism 5 Minutes

1. Introduction 2 Minutes

2. Components of the ecosystem 2 Minutes

3. Biotic components 3 Minutes

4. Consumers 3 Minutes

5. Decomposers 4 Minutes

6. Trophic levels 4 Minutes

7. Food chain 3 Minutes

8. Food web 3 Minutes

9. Interrelationship between plants and animals and autotrophs 4 Minutes

10. Heterotrophs and different modes of nutrition 7 Minutes

11. Ecosystem and Pond ecosystem 7 Minutes

12. Land ecosystem 6 Minutes

13. Ecosystem services 3 Minutes

14. Regulating services, Cultural services and Supporting services 6 Minutes

15. Basic requirements of human beings and Adverse impacts of climate change on ecosystem 5 Minutes

1. Natural Disasters 2 Minutes

2. Hazards and disasters 2 Minutes

3. Management of natural disasters and management of anthropogenic disasters 7 Minutes

4. Distance management cycle 5 Minutes

5. Avalanche 5 Minutes

6. Preventive measures of avalanche 3 Minutes

7. Glacial Lake Outburst Flood(GLOF) 4 Minutes

8. Effects of GLOF and preventive measures of GLOF 4 Minutes

9. Hurricanes 4 Minutes

10. Causes of hurricanes 4 Minutes

11. Effects of hurricanes 3 Minutes

12. Preventive measures against a hurricane 4 Minutes

1. Greenhouse 4 Minutes

2. Advantages and disadvantages of greenhouse effect 4 Minutes

3. Artificial greenhouse 2 Minutes

4. Importance of artificial greenhouse 2 Minutes

5. Climate change 3 Minutes

6. Causes of climate change 5 Minutes

7. Effects of climate change 6 Minutes

8. Measures of management of climate change 6 Minutes

1. Astronomical unit and Light year 7 Minutes

2. Parsec 5 Minutes

3. Solar system 8 Minutes

4. Interrelation among the Sun, the Earth and the Moon 6 Minutes

5. Diurnal motion of the Earth 7 Minutes

6. Annual motion of the Earth 4 Minutes

7. Phases of Moon 6 Minutes

8. Sidereal and Synodic month 7 Minutes

9. Eclipse 5 Minutes

10. Umbra and Penumbra 7 Minutes

11. Solar eclipse 4 Minutes

12. Lunar eclipse 6 Minutes

13. The Lunar nodes 5 Minutes