Keeping Warm

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Keeping Warm
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Keeping Warm

• ObjectivesKnow that good thermal insulators
  keep cold objects cold and warm objects
  warmUnderstand that metals are not good thermal
  insulators
• but wood and plastics are

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Keeping Warm

• guess the temperature of the liquid

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Keeping Warm

• Lets 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?
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Keeping Warm
Activity Click on the penguin then click to start
the clock Watch what happens to the temperature
of the hot water.
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Keeping Warm

• Were your predictions correct?

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Keeping Warm

• Is there a way of keeping the drink warm or at
  least stopping it cooling down so quickly?

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Keeping Warm

• A material that stops heat loss is called a
  thermal insulator.

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Keeping Warm

• You are going to work in pairs on an
• online activity to see if you can
• find a material that is a
• good thermal insulator.

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Keeping Warm

• work through the activity, following the tasks
  written (and spoken) at the top of the screen.
• Wrap the flask in different materials to see
  which prevents the water losing its heat
• Record results in the table.

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Keeping Warm

• 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?
What type of material was a good insulator?
Think of an example of when we want to stop
something warming up.
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Keeping Warm

• If a material is a good insulator
• it will stop an object losing heat
• (like a hot drink),
• or
• stop an object warming up
• (like an ice-lolly).

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This contribution to Science was made by
Lorraine Cooper St Josephs Catholic Primary
School Stourbridge