Elyse and Dylan are playing a game. They are trying to solve the clues in order to reach the next level. Ada the science app begins to explain how stars have their own unique fingerprint. By using the light that’s emitted from stars, Ada explains how this light has been a revealing insight to the composition of the star.
Use the animation and laboratory emission spectra of different elements to decide what elements are in the atmosphere of different stars. Pupils can perform a human demonstration of the emission/absorption spectra. To do this, pupils should split into two groups. The first group should act as the light emitting from a star, and the second group act as the gas surrounding the star. Pupils should try to model the light passing through the atmosphere, with one pupil in the atmosphere group ‘absorbing’ a pupil from the light group. At the end, some pupils will be missing and this can be interpreted as the absorption/emission spectra. Advanced - Pupils should research how different elements have different emission/absorption spectra based on the layout of their atoms. Further advancements can be made from describing how the energy levels of an electron corresponds to certain wavelengths, thus calculating the energy and wavelength of any light given.Pupils could model emission spectra using an analogy of their own, ie a set of stairs and only certain steps of ‘light’ being allowed to pass through.