Heat Flashcards
Solids liquids and gases expand
When heated
Solids liquids and gases contract
When cooled
The unit of energy
Joule (j)
Water
Begins to expand when cooled below 4 degrees Celsius
Bimetallic strip
Shows that not all metals expand at the same rate
Conduction
Heat travels from particle to particle along a substance normally a solid
Convection
heat travels through a fluid when the particles move and carry the heat
Radiation
heat travels from a hot object without the need for a medium does not need a solid liquid or gas to go through
Conductor
Something that allows energy to flow through it
Insulator
Is a substance that doesn’t allow heat to flow through it easily eg plastic
Air
Is a good insulator keeps animals warm is trapped by fur and helps to insulate the animal
Layers
The hair on our arms are not very good at keeping us warm if we wear layers of clothes air is trapped to keep us warm
Temperature is measured with ?
A thermometer
2 types of thermometer?
Mercury and alcohol thermometer
Temperature is measured between
O-100c
