Heat Flashcards
Solids , liquids and gases expand
When heated
Solids , liquids and gases crontract
When cooled
What is the unit of energy
The unit of energy is the Joule
Heat is a form of energy
Heat moves mountain lava
Bimetallic strip
The bimetallic strip shows that not all metals expand at the same rate , change e.g. Thermostats in heating or an iron
Water
Water begins to expand when cooled below 4 degrees celsius
Conduction
Heat travels from particle to particle along a substance , normally a solid
Convection
Heatvtravels through a fluid (liquid or gas ) when the particles move and carry the heat
Radiation
Wheat travels from a hot object without the need for a medium , does not need a solid , liquid or gas to go through , will flow through a vacuum
Conduction
Conduction is the method by which heat travels from particle to particle through a solid
Conductor
A conductor is something that allows energy e.g heat to flow through it , e.g metal is a good conductor
Insulator
Insulator is a substance that doesn’t allow heat to flow through it easily e.g plastic
Air
Air is a good insulator , keeps animals warm , is trapped by the fur and helps to insulate the animal
Layers
The hairs on our arms are not very good at keeping us warm , if we wear layers of clothes , air is trapped to keep us warm
Radiation
All heat object radiate heat . The hotter the object the more heat it radiates
