Sign up now
to enroll in courses, follow best educators, interact with the community and track your progress.
Important Topics of Class 8 Science NCERT - Physics, Chemistry, Biology
14,540 plays


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.

Unacademy user
Thank you so much Ma'am
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
  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