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Science topics ages 8 - 9
Keeping warm
Curriculum relevance |
Online lesson plan
Off-line lesson plan
| Worksheet | Activity |
Quiz
Online lesson plan
Objectives
Know that good thermal insulators keep cold objects cold and warm objects
warm
Understand that metals are not good thermal insulators but wood and plastics
are
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National Curriculum
England: Key Stage 2, Science, Sc3 1b, 2c
Wales: Key Stage 2, Materials and their properties 1.2, 1.7
Northern Ireland: Key Stage 2, Materials, Properties, a
Scotland: 5-14 Guidelines, Science, Materials from Earth Level B; Properties
and uses of energy Level E
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Resources required
Online activity from Science Clips website: Keeping warm
A hot drink and a thermometer
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Teaching activities
Introduction
Show the children a cup of hot coffee or tea. Ask them to guess the
temperature of the liquid. Measure the temperature accurately with a
thermometer. What would happen to the drink if we left it in a room for an
hour? What would happen to the temperature? On an interactive whiteboard, bring
up the online activity. Click to start the clock and watch what happens to the
temperature of the hot water. Were their predictions correct?
Activities
Is there a way of keeping the drink warm or at least stopping it cooling down
so quickly? Accept children’s ideas, which may include examples of flasks
they have in their packed lunches. Tell the children that a material that stops
heat loss is called a thermal insulator. Explain they are going to work on the
online activity to see if they can find a material that is a good thermal
insulator.
Arrange the children in pairs or groups, with a computer for each group. Ask
children to work through the activity, following the tasks written (and spoken)
at the top of the screen. They wrap the flask in different materials to see
which prevents the water losing its heat and record results in a table.
Plenary
Discuss what they found out from the activity. Which material was the best
thermal insulator? Which was the worst? Was it better than having no insulating
material? What type of material was a bad insulator (metal)? What type of
material was a good insulator (plastic)? Think of an example of when we want to
stop something warming up (e.g. an ice-lolly). Which material would be the best
insulator to surround it with? Explain to the children that if a material is a
good insulator it will stop an object losing heat (like the hot drink), or stop
an object warming up (like an ice-lolly).
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Extension
Ask children to plot the results from the table in the online activity as a
line graph.
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Suggested homework
Ask children to find materials in their houses that work as insulators, either
stopping something losing heat or stopping something warming up.
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