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Important Topics of Class 8 Science NCERT - Physics, Chemistry, Biology
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Roman Saini is teaching live on Unacademy Plus

Roman Saini
Part of a great founding team at Unacademy with Gaurav, Hemesh. Movies, Guitar, Books, Teaching.

U
Unacademy user
4/14 kaise aaya 1 question mein
VS
sir please complete the course
Sir making notes in IAS for atleast 20 books consumes huge time what to do. plx guide
thank u Roman sir do all the ncert of all the subjects pllzzzz
thank you roman sir.
Kushagra pandey
2 years ago
Hm
  1. Class 8 Science NCERT Important Topics


  2. Chapter 1: Crop Production And Management Kharif and Rabi crops; manures vs fertilizers- pros and cons of each; traditional and modern methods of irrigation; need for weeding; animal husbandry Chapter 2: Microorganisms: Friend And Foe Definition and types of microbes and diseases caused by them; focus on their role in our daily life e.g. in nitrogen fixation, curd, yeast in baking; commercial and medicinal use of them- e.g. in alcohol,antibiotics; how vaccines work; pathogens and how they cause various diseases in humans, animals and plants; memorize table 2.1 and 2.2; some common preservatives; pasteurization; nitrogen cycle- practice figure 2.10 very well


  3. Chapter 3: Synthetic Fibres And Plastics Know about types of synthetic fibres and their daily uses; ways to minimise the damage caused to environment due to their improper disposal Chapter 4: Materials: Metals And Non-metals Just read the physical properties of metals and non-metals and skip the rest of the chapter r 5: Coal And Petroleum Know the process of formation of coal i.e. carbonisation; coke,coal tar and coal gas and their uses mechanism and places of formation of petroleum, its refining products and theri uses (see table 5.1); natural gas reserves in our country Chapter 6: Combustion And Flame Speed read this chapter; focus on last page which gives consequences of burning of fuels


  4. Chapter 7: Conservation Of Plants And Animals Causes and consequences of deforestation; definition of various protected areas- national parks, wildlife sanctuaries and biosphere reserves; case study of biosphere reserves- flora and fauna; endemic species; examples of threatened and endangered wildlife animals; concept of ecosystem; Red data book; migration of birds Chapter 8: Cell Structure And Functions Multicellular and unicellular organisms; tissues; parts of the cell and their functions; prokaryotic vs eukaryotic cells; comparison of plant and animal cells Chapter 9: Reproduction In Animals Sexual vs asexual reproduction; male and female reproductive organs and their functions; fertilization; in vitro vs in vivo; development of embryo; viviparous and oviparous animals; concept of metamorphosis;budding and binary fission


  5. Chapter 10: Reaching The Age Of Adolescence Just read the parts related to hormones; Chapter 11: Force And Pressure Speed read this chapter. Nothing much important. Chapter 12: Friction Factors affecting friction; necessity of friction; rolling vs sliding friction; applications in daily life Chapter 13: Sound Know the characteristics of south waves; oscillatory motion; noise pollution


  6. Chapter 15: Some Natural Phenomena Important chapter; understand the reasons and mechanism of lightning and earthquakes; protection against earthquakes Chapter 16: Light Know about the concepts of reflection, refraction, lateral inversion, diffusion, dispersion of light, parts and functioning of human eye, basics of braille system


  7. Chapter 17: Stars And The Solar System Various phases of the moon; some famous constellations; planets of solar system and their characteristics; asteroids, comets, meteors and meteorites; artificial satellites of India and their practical applications Chapter 18: Pollution Of Air And Water Reasons for air pollution, various air pollutants, smog and its formation, CCs and their effect on Ozone layer; causes and consequences of acid rains; all about greenhouse effect and global warming; causes and consequences of water pollution; case study of Ganga; methods of water purification