P1

What happens when energy flows from a warmer to a colder body?

How does a thermogram show temperature change?

What is the difference between temperature and heat?

What is specific heat capacity?

What is specific latent heat?

Why when a material is changing state, energy is transferred, but the temperature stays the same?

How does double glazing reduce energy loss?

What are the 6 steps for how loft insulation helps reduce energy loss through conduction and convection?

How does cavity wall insulation help reduce energy loss by conduction and convection?

How do insulation blocks wrapped in shiny foil help reduce energy transfer?

How does conduction work?

How does convection work?

How does radiation work?

What can energy transformations be shown by?

Payback time=

What are insulated buildings?

What do designers and architects strive for?

Define amplitude

Define crest and trough

Define wavelength

Define frequency

Wave speed=

What is the order of the electromagnetic spectrum?

What has the longest wavelength in the electromagnetic spectrum?

What optical instruments use two or more plane mirrors?

Why does refraction occur?

What is diffraction?

When does the most diffraction occur?

Where are diffraction effects most visible?

How does Morse code work? What is it an example of?

What signals are pretty much instantaneous?

What are the things to consider when thinking about the method of transmission?

What is the difference between white light and laser light?

How does laser light read the surface of a CD?

When is the angle of refraction larger than the angle of incidence?

What is the angle of incidence called when the angle of refraction is 90 degrees?

What happens if the angle of incidence is bigger than the critical angle?

How are telephone conversations and computer data sent?

Why are some fibres coated?

How does an endoscope work?

What penetrates food more, microwaves or infrared?

What other materials can microwaves penetrate, what's different with a microwave oven?

High/Low frequency short/long wavelength transfers the most energy

How do normal ovens cook food using infrared?

How do microwaves cook food?

What is the range of length of microwaves?

Why is less energy transferred using mobile phones?

What is used to communicate over long distances?

What must be in order for microwaves to be used?

What else are used for microwave communication and how does this work?

What are there concerns about?

Why can signal strength vary? (3 reasons)

Why are mobiles banned on planes and in hospitals?

What do infrared signals do?

What are the 3 main steps in how a TV remote works?

What are the four improvements of the switchover from analogue to digital?

What do optical fibres allow?

How do analogue signals work?

Why do interferences not show up on digital signals?

How does multiplexing work?

Give 3 examples of where wireless technology is used

How are radio waves transmitted?

Do radio stations have there own particular frequency?

What can happen with radio waves?

How can we reduce interference?

Why do people prefer DAB radios?

Radio waves undergo...

What reflects radio waves?

What allows radio waves to be received by a receiver that isn't in line of sight?

What type of wave can pass through the ionosphere?

How long do communication satellites take to orbit the Earth?

What are the 5 problems with communication?

What are the 3 different types of waves shown on a seismograph during an earthquake?

What are the 2 qualities of P waves?

What are the 2 qualities of S waves?

What information have scientists gathered from P and S waves?

What is tan caused by?

Why do people with darker skin not tan as easily?

What is the equation to find out max length of time to spend in sun?

Why did scientists at first, not believe in the thinning of the ozone layer?

Where is ozone found?

What does ozone help do?

What destroys the ozone?

Why is the ozone layer thinnest above the south pole?

How do scientists monitor the thickness of the ozone layer?

What is there an international agreement to do?