Page 13 - E-Science Prim.6 2024-2025 U2_Handy
P. 13

They can’t prevent
                                         transfer of heat
                                           completely

P.O.C       Thermal conductors              Thermal insulators
                                          Bad conductors of heat
            Good conductors of heat     Materials don’t let “resist”

Definition Materials let heat flow            heat flow through
                                         They slow down the heat
            through.
                                                    transfer
            They allow heat to travel   Wood, glass, plastic, paper,

            freely.                         wool, rubber and air.

Ex: Metals: Iron, aluminum,            Plastic in the electric iron let
                                         you hold it safely without
            copper, mercury and                feeling hotness.
                                         Handles of cooking pots.
            stainless steel.

Usage Iron transfers the heat

            from the electric iron to
            cloth. “Ironing” Cooking

            pots are made of

            aluminum.

                               58

First Term
   8   9   10   11   12   13   14   15   16   17   18