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Principle of Expansion and Contraction of Matter - Coggle Diagram
Principle of Expansion and
Contraction of Matter
Solid
Heated – particles vibrate faster and move further apart from one another
Solid expands
Cause the volume of the solid to increase
Cooled – particles vibrate slower and move closer to one another
Volume of the solid decrease
Solid contracts
Liquid and Gas
Particles in liquid and gas moves freely
Heated – move faster and randomly
Distance between particles increases
Distance between particles increases
Liquid and gas expand
Cooled – particles move slower and closer
Volume decreases
Liquid and gas contract
The Uses of Expansion and Contraction of Matter in Daily Life
-Mercury in a thermometer is a heat conductor
-Can expand and contract
-Railway tracks have small gaps between their rails
-Enable them to expand in hot weather
-Without these gaps, the tracks will buckle and overlap
-Steel bridges are built with rollers and a gap on one end.
-Allows the bridges to expand in hot weather.
-Bimetallic strip – used in devices that depend on temperature regulation.
-Made from two different types of metal strips that can expand and contract at different rates
Fire alarm system - Designed with a circuit which is incomplete at room temperature