![]() Students also often believe that the sun’s energy is changed into plant matter during the process of photosynthesis. Students also often believe that matter is exchanged or converted into energy (for example, they believe that wood turns into heat during combustion and food turns into energy when we metabolise it) or they confuse the energy of food (listed on packets as kilojoules) with the weights of the listed ingredients. Research: Driver (1985), Russell, Harlen & Watt (1989) ![]() Invisible gases are involved in many of these processes leading to many of these alternative student conceptions. ![]() It may seem to students that matter disappears or appears during processes such as dissolving, burning, evaporation, boiling, rotting, respiration, rusting, condensation and growth of plants. They observe that sugar disappears when mixed with water, a large log burns away to a small amount of ash, cars rust and big holes appear, water boils away, frost and condensation appear from apparently nowhere and trees grow apparently from nothing but the soil. Contrasting student and scientific viewsĬontrasting student and scientific views Student everyday experiencesįor many students the idea that matter is conserved is not a natural one.
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