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4.8 describe how insulation is used to reduce energy transfers from buildings and the human body

Task 1

·         Use this interactive animations to investigate how different insulation affects the rate of cooling of hot water

Task 2

·         Use these interactive animations to find out about the energy transfers in a house

Task 3

·         Test your knowledge with this quiz

Types of energy transfers in a house - interactive.swf Download this file

Quiz - Types of energy transfers in a house.swf Download this file

Insulation in a house - % heat losses and savings.swf Download this file

Cooling of hot water with insulation - interactive.swf Download this file

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4.7 describe the role of convection in everyday phenomena

Task 1

·         Try the animation

·         Extension: what is happening to the particles in the air?

Task 2

·         Why is Lee tired after cycling to the Sea in the morning?

·         Predict what will happen when Lee cycles home in the evening

Lee cycles towards the sea ... and back worksheet.pdf Download this file

Convection in a room with a radiator.swf Download this file

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Answers to

Entrance Activity for 4.7

10 June 2011

15:32

Answers...

1.             What is the most common heat transfer mechanism in solids?

Conduction

2.             What is the most common heat transfer mechanism in liquids and gases?

Convection

3.             What is the only heat transfer mechanism in a vacuum?

(Infra-red) Radiation

4.             Why can't conduction happen in a vacuum?

There are no particles in a vacuum to transfer the vibrations

5.             What happens to the space between the particles in a gas when you heat it?

The space between the particles increases

6.             What happens to the density of a gas when you heat it?

It decreases because the space between the particles increases

7.             Why can't convection happen in a solid?

In a solid the particles are fixed in position and are not free to move

Notes on Conduction, Convection and Radiation from Collins

Begin forwarded message:

From: Matt Baker <maba@patana.ac.th>

Date: August 26, 2011 8:04:30 AM GMT+07:00

To: Amaris Odermatt <amod14@patana.ac.th>, Churaimas Diskul <chdi14@patana.ac.th>, Hannah Amanda Fotheringham <hafo14@patana.ac.th>, Janyaporn Buaboos <jabu14@patana.ac.th>, Jarouwit James <jaja14@patana.ac.th>, Khuntup Issara <khis14@patana.ac.th>, Oliver Thomas Bailey <olba14@patana.ac.th>, Tamara Nikki Davies <tada14@patana.ac.th>

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Subject: Notes on Conduction, Convection and Radiation from Collins

Notes on Conduction, Convection and Radiation from Collins

26 August 2011

08:01

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