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Science Teacher Training in an Information Society
Start Teaching about energy

 USIE

Workshop 1

Introduction
Section A
Section B
Activity B1
Activity B2
Activity B3
Activity B4
Activity B5
Activity B6
Activity B7
Activity B8
Section C
Section D
Section E
Section F
Section G

StartContents

Section B  Learning about the innovation

Activity B4  Energy from hot to cold (cont.)
Page 2 of 7
 1    2    3    4 
 5    6    7 

Energy on the move

Sheet 1 - A beaker of hot water cools down

A  Which shows a beaker of hot water best?  Picture 1 shows something which contains concentrated energy (i.e. something hot).  The energy in the background is less concentrated (i.e. the room is cooler).

B  Which shows the energy transfer best?  Picture 2 shows energy flowing from where it concentrated to where it is less concentrated (i.e. from hot to cold).

C  Which shows what happens best?  Picture 2 shows that the water has cooled down so that it is now at the same temperature as the background.

Sheet 2 - An ice cube melts in the room

A  Which shows an ice cube best?  Picture 3 shows something which contains less concentrated energy that the background (i.e. something cold).

B  Which shows the energy transfer best?  Picture 1 shows energy flowing from the background to the ice cube.  (Some children may think that it is 'cold' that flows from the ice cube to the background.)

C  Which shows what happens best?  Picture 2 shows that after melting the water will end up at the same temperature as the background.

Sheet 3 - A metal block is put in hot water

We can make pictures which show what happens when there are two or more objects. 

A  Which shows the energy transfer best?  Picture 2 again shows energy flowing from where it is hot to where it is colder.  Energy is transferred from the water to the metal.

B  Which shows what happens best?  Picture 2 shows that the water and the metal end up at the same temperature.  One has cooled down and the other has warmed up.  The energy becomes spread out between the two.  (Both water and metal are now warmer than background - eventually they will cool down to the same temperature.)
 

Energy transfers in the kitchen: answers (from pages 6 and 7)

A  2  ->  8
B  2 3  ->  10 10
C  5  ->  8
D  4 5  ->  11 11
 
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