# P1 - Energy for the Home

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What is Conduction?
Conduction is the transfer of heat from a hotter area to a cooler area through a solid
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What is Convection?
The water at the bottom expands as it heats up and then rises and then cools.
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Infrared radiation is an electromagnetic wave, it doesn't need particles to travel so can therefor travel through a vacuum like space
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What is a thermogram?
Temperatures can be represented by a range of colours in a thermogram
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What is Payback time?
It is the time taken to get back the cost of the insulation and it depends on how much money the insulations costs and how much money you will save.
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What is energy efficiency?
The energy efficiency of appliances depends on how much useful energy you can get out compared to what was put in. This is showed in a sankey diagram.
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What is Specific Heat Capacity? (SHC)
To heat soothing up you need to give it energy and the amount of energy needed depends on the mass of the object, the desired increase in the temperature.
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What is the Specific Heat Capacity of a Material?
It is the amount of energy required to raise the temperature of 1kg of the material by 1 degree celsius
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What is Specific Latent Heat? (SLH)
It is the energy needed to melt or boil things. It is calculated using: Energy required = mass x SLH
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What is the frequency of Waves?
The frequency of waves is the number of waves that pass a fixed point each second and it is measured in Hz (Herts). When the wavelength decreases the frequency increases.
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What are Transverse Waves?
Energy that moves at a right angle to displacement of particles to matter.
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What are Longitudinal Waves?
Energy that moves in the same direction as the displacement of particles to matter.
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What is the Electromagnetic Spectrum?
It is the range of wavelengths or frequencies over which electromagnetic radiation extends.
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What happens when you are Cooking with waves?
The microwaves are absorbed by water molecules in outside layers, energy is transferred to the centre of the food using conduction or convection
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What is reflection?
Light travels at 3 x ,000,000,000 m/s when it travels through air. When the light changes speed it bends or refracts
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What is Diffraction?
Diffraction is the spreading out of waves around a corner or through a gap.
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What is Total internal Reflection?
It occurs whn light hits a boundary above a certain angle, this is called a critical angle
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What is Global warming caused by?
Increased energy use, increased carbon dioxide levels, deforestation, volcano emissions and factories
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What are seismic waves?
The shadow zone is a region where seismic waves do not reach, they are transmitted through the earth to provide evidence for its structure.
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What can P waves travel through?
P waves can travel through solid and liquid rock (all layers of the earth)
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What can S waves travel through?
S waves cannot travel through liquid rock (the outer core) so the core must be liquid because the S waves can't travel through it
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## Other cards in this set

### Card 2

#### Front

What is Convection?

#### Back

The water at the bottom expands as it heats up and then rises and then cools.

### Card 4

#### Front

What is a thermogram?

### Card 5

#### Front

What is Payback time?