![]() Insert the new batteries into the battery holder, paying attention to the polarity.Īfter use, immediately remove one battery from the battery holder. You need to connect "–" of the battery to the "–" of the battery holder, and "+" to "+". There is almost always a spring on the negative side of the contact in the battery holder. The convex end of cylindrical batteries is their "+".Īnd the polarity must be indicated on the battery case or label! The flat end of the cylindrical batteries is their "–". If these characteristics conflict, one of the batteries can start to overheat, which can potentially result in a battery leaking and damage to the equipment.Ĭarefully examine your batteries to determine their polarity and location in the battery holder. ![]() ![]() Batteries made by different manufacturers can have different specs (voltage, amperage, etc.). We highly recommend that you use the same brand of batteries in your devices. Substances in non-reclosable packaging should be used up (completely) during the course of one experiment, i.e. A solid table with a heat resistant top should be provided It should be well lit and ventilated and close to a water supply. The area surrounding the experiment should be kept clear of any obstructions and away from the storage of food. Particular attention should be paid to the safe handling of acids, alkalis and flammable liquids. The supervising adult should discuss the warnings and safety information with the child or children before commencing the experiments. ![]() The instructions should enable supervisors to assess any experiment to establish its suitability for a particular child. This experimental set is for use only by children over 12 years.īecause children’s abilities vary so much, even within age groups, supervising adults should exercise discretion as to which experiments are suitable and safe for them. Only carry out those experiments which are listed in the instructions. The incorrect use of chemicals can cause injury and damage to health. ![]()
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