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The effectiveness of a '''thermal insulator''' is affected by two factors:
*[[Thermal Conductivity]] - The lower the [[Thermal Conductivity|thermal conductivity]] the better the [[material]] is as an '''insulator'''.
*Thickness - The thicker the [[material]] the better it will be at reducing [[Energy Transfer|energy transfer]]and the more effective the '''insulation'''. ===References=======AQA==== :[https://www.amazon.co.uk/gp/product/1782946403/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1782946403&linkCode=as2&tag=nrjc-21&linkId=32a0abb60dff015b15b50e9b1d7b4644 ''Insulators (thermal), pages 34, 36, 37, GCSE Combined Science Trilogy; Physics, CGP, AQA '']:[https://www.amazon.co.uk/gp/product/1782945970/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1782945970&linkCode=as2&tag=nrjc-21&linkId=a120d24dcc7cc7a58192069a3aafc1d2 ''Thermal insulators, page 37, GCSE Physics; The Complete 9-1 Course for AQA, CGP, AQA '']:[https://www.amazon.co.uk/gp/product/1782946403/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1782946403&linkCode=as2&tag=nrjc-21&linkId=32a0abb60dff015b15b50e9b1d7b4644 ''Thermal insulators, pages 34, 36, 37, GCSE Combined Science Trilogy; Physics, CGP, AQA '']:[https://www.amazon.co.uk/gp/product/1782945970/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1782945970&linkCode=as2&tag=nrjc-21&linkId=a120d24dcc7cc7a58192069a3aafc1d2 ''Thermal insulators; investigating, page 38, GCSE Physics; The Complete 9-1 Course for AQA, CGP, AQA '']