Aqa Physics Paper 1 Study Guide Rated A+

volt meter {Ans: measures potential difference}greenhouse effect {Ans: CO2 and other greenhouse gases in the atmosphere absorb long wavelength radiation radiated from the Earth's surface and prevent it escaping.}Insulator {Ans: A material that does not allow heat or electrons to move through it easily.}light emitting diode {Ans: }carbon neutral {Ans: an activity that does not change atmospheric carbon dioxide concentrations}Unit of pressure {Ans: Pascals, Pa OR Newtons per metre squared, N/m^2}