SOME NATURAL PHENOMENA | Class 8 Science Notes
By ConceptScroll Team · Published on 17 July 2026 · 2 min read
SOME NATURAL PHENOMENA – this guide gives you a concise, exam-ready overview of SOME NATURAL PHENOMENA from Class 8 Science, written by ConceptScroll editors and reviewed against the latest NCERT textbook.
12.1 Lightning
Lightning is a natural electrical phenomenon characterized by a sudden electrostatic discharge between electrically charged regions in the atmosphere, typically during thunderstorms. It is similar in nature to the small sparks you might have seen on electric poles when wires become loose or when a plug is loosely connected to a socket. These sparks are caused by the movement and accumulation of electric charges. Ancient people were afraid of lightning, attributing it to the wrath of gods, but modern science explains lightning as a result of charge accumulation in clouds. Lightning occurs when the difference in electric potential between charged regions becomes so large that the insulating air breaks down, allowing current to flow in the form of a bright flash of light and accompanying thunder. Understanding lightning scientifically helps us take precautions to protect ourselves from its deadly effects.
📊 Diagram: No specific diagram in this subsection.
🧪 Activity: Observation of sparks on electric poles and plugs to relate to lightning phenomenon.
🔗 Connection: Introduces the concept of electric charges and their properties, which explain the cause of lightning.
Frequently asked questions
What is lightning and how does it occur during a thunderstorm?
Lightning is a sudden electrostatic discharge between electrically charged regions within clouds or between clouds and the ground. It occurs when air currents inside thunderclouds cause separation of charges, with positive charges accumulating at the top and negative charges at the bottom, leading to a discharge when the charge difference is large enough.
Which of the following statements correctly describes the reason why thunder is heard after lightning?
Light travels faster than sound, so lightning is seen before thunder is heard.
What safety device is used on buildings to protect them from lightning strikes, and how does it work?
A lightning conductor or lightning rod is used to protect buildings. It provides a safe path for the electric discharge from lightning to flow into the ground, preventing damage and fires.
Which of the following materials is an insulator?
Plastic
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- LIGHT | Class 8 Science Notes
Clear NCERT-aligned notes on LIGHT for Class 8 Science.
- LIGHT | Class 8 Science Notes
Clear NCERT-aligned notes on LIGHT for Class 8 Science.
- LIGHT | Class 8 Science Notes
Clear NCERT-aligned notes on LIGHT for Class 8 Science.