# AQA P1.1 The Transfer of Energy

Here is all the information you'll need for AQA P1.1, the specification statements  are the bits the examiner want you to know, and know really well!!! You can use this to revise or to study if you missed class. I've added in videos and links to help you understand

I know this page seem a bit lopsided in parts with lots of videos for one statement and then one video covering a few statements together, but this is based on what the examiners like to ask questions on - this should not be taken as a suggestion on what they will or wont ask questions on in the future.

'All objects emit and absorb infrared radiation. '(AQA, 2012)

'The hotter an object is the more infrared radiation it radiates in a given time.'(AQA, 2012)

'Dark, matt surfaces are good absorbers and good emitters of infrared radiation.'(AQA, 2012)

'Light, shiny surfaces are poor absorbers and poor emitters of infrared radiation.' (AQA, 2012)

'Light, shiny surfaces are good reflectors of infrared radiation.' (AQA, 2012)

'The use of kinetic theory to explain the different states of matter.' (AQA, 2012) 'The particles of solids, liquids and gases have different amounts of energy.' (AQA, 2012)

'The transfer of energy by conduction, convection, evaporation and condensation involves particles, and how this transfer takes place. The factors that affect the rate of evaporation and condensation.' (AQA, 2012)

'The rate at which an object transfers energy by heating depends on: surface area and volume, the material from which the object is made ,the nature of the surface with which the object is in contact.' (AQA, 2012)

'The bigger the temperature difference between an object and its surroundings, the faster the rate at which energy is transferred by heating.' (AQA, 2012)

'U-values measure how effective a material is as an insulator.' (AQA, 2012)

'The lower the U-value, the better the material is as an insulator.' (AQA, 2012)

'Solar panels may contain water that is heated by radiation from the Sun. This water may then be used to heat buildings or provide domestic hot water.' (AQA, 2012)

'The specific heat capacity of a substance is the amount of energy required to change the temperature of one kilogram of the substance by one degree Celsius. ' (AQA, 2012)

Reference list

AQA, GCSE Specification Physics. 2012 http://filestore.aqa.org.uk/subjects/AQA-PHYS-W-SP-14.PDF date accessed 06.10.15