Ball & Ring Gravesande's - Chain Type

The Ball and Ring - Gravesande's Apparatus (Chain Type) is a classic physics demonstration tool designed to show the expansion and contraction of metals with heat. At room temperature, the brass ball easily passes through the metal ring. Once the ball is heated, it expands and can no longer pass through the ring, visually demonstrating the principle of thermal expansion.

This apparatus includes a brass ball and ring, both mounted on sturdy steel rods with wooden handles for safe handling. It's an engaging way to introduce material behaviour, molecular motion, and temperature effects.

Educational Benefits:

• Demonstrates thermal expansion of solids
• Supports conceptual understanding of temperature and volume
• Encourages predictive thinking and observation
• Aids discussion on atomic structure and kinetic theory

Classroom Ideas:

• Compare cooled vs heated metal behaviour
• Use in group demonstration to introduce heat expansion
• Explore real-world implications (e.g. railway tracks, bridges)

Specifications:

• Includes: Brass ball and ring
• Mounting: Steel rods with wooden handles
• Features: Chain connection for ease of use
• Use: Thermal expansion demonstration
• Units: Each