CBSE Class 8 Science – Some Natural Phenomena

Chapter Overview

This chapter explores several natural phenomena that occur in our environment. It covers the formation and characteristics of lightning and thunder, as well as the optical process behind rainbows. The chapter explains the underlying physical principles like refraction, reflection, dispersion, and how these phenomena impact our daily lives.

Important Keywords

• Lightning: A sudden electrostatic discharge during a storm.
• Thunder: The sound produced by the rapid expansion of air due to lightning.
• Rainbow: A multicoloured arc formed by the refraction and dispersion of sunlight in water droplets.
• Refraction: The bending of light as it passes from one medium to another.
• Dispersion: The separation of light into its component colours.
• Reflection: The bouncing back of light from a surface.
• Electrostatic Discharge: The sudden flow of electricity between two charged objects.