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NCERT Solutions for Class 8 Science Chapter 15: Some Natural Phenomena

iacst-2022

The chapter begins with an introduction to lighting and sparks. Consequently, we read about charged objects and the methods through which we can charge them. We will also study about the different types of charges and their interaction. We also learn about the transfer of these charges. The chapter also tells us about how lightning is caused. We also study about safety precautions to take during lightning. The chapter concludes by teaching us about earthquakes. We learn about the causes behind earthquakes and also about safety precautions during an earthquake.

  • Accumulation of charges in the clouds causes lightning.
  • We study about how ancient Greeks came to know about sparks as early as 600 B.C.
  • Rubbing two materials together can also create a charge.
  • For example, rubbing a comb on dry hair can make the comb a charged object.
  • Charges can be negative or positive.
  • Various experiments in the chapter show how positive or negative charges can be attained.
  • Electroscopes are used to determine whether an object carries a charge or not.
  • Various experiments in the chapter also show how these charges can be transferred from one object to another.
  • The chapter goes on to explain the whole process of how lightning is created in the clouds.
  • The do’s and don’ts during lightning are also explained in the chapter.
  • We also study about earthquakes and how they can be predicted.
  • An earthquake is a sudden shaking or trembling of the earth which lasts for a very short period of time.
  • We learn about the causes of earthquakes like the shifting of tectonic plates.
  • The magnitude of an earthquake is measured on a Richter scale.
  • The chapter concludes by telling us about the dos and don’ts during an earthquake.

 

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Also See    
NCERT Solutions for Class 8 Science Chapter 1:Crop Production and Management NCERT Solutions for Class 8 Science Chapter 2: Microorganisms - Friend and Foe NCERT Solutions for Class 8 Science Chapter 3: Synthetic Fibres and Plastic
NCERT Solutions for Class 8 Science Chapter 4: Materials - Metals and Non-Metals NCERT Solutions for Class 8 Science Chapter 5: Coal and Petroleum NCERT Solutions for Class 8 Science Chapter 6: Combustion and Flame
NCERT Solutions for Class 8 Science Chapter 7: Conservation of Plants and Animals NCERT Solutions for Class 8 Science Chapter 8: Cell – Structure and Functions NCERT Solutions for Class 8 Science Chapter 9: Reproduction in Animals
NCERT Solutions for Class 8 Science Chapter 10: Reaching the Age of Adolescence NCERT Solutions for Class 8 Science Chapter 11: Force and Pressure NCERT Solutions for Class 8 Science Chapter 12:Friction
NCERT Solutions for Class 8 Science Chapter 13:Sound NCERT Solutions for Class 8 Science Chapter 14: Chemical Effects of Electric Current NCERT Solutions for Class 8 Science Chapter 16: Light
NCERT Solutions for Class 8 Science Chapter 17: Stars and the Solar System NCERT Solutions for Class 8 Science Chapter 18: Pollution of Air and Water  

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