by STAO ADMIN | Nov 14, 2019
Food labels often contain the word “fortified”. This means that one or more ingredients have been added that are not normally found in that food item. The purpose is to increase the amount of that mineral or nutrient to serve a dietary purpose. Table salt...
by STAO ADMIN | Nov 14, 2019
The demonstrations/activities in this resource have been designed to challenge students’ thinking as well as initiate lively classroom discussions that support constructivist learning. These short demonstrations/activities often involve discrepant events,...
by STAO ADMIN | Nov 14, 2019
Flour is an ingredient that is found in most kitchens and used regularly for baking and cooking. Consequently, it is considered safe, and people do not regard the potential hazards. In reality, flour and dust explosions are extremely dangerous, and reducing the risk...
by STAO ADMIN | Nov 14, 2019
The thermite reaction is very exciting, but also extremely dangerous. Iron has a melting point of over 1500oC and the reaction can reach temperatures of over 2000oC. This reaction was once used to weld railroad tracks together. The purpose of this demonstration is to...
by STAO ADMIN | Nov 14, 2019
This classic demonstration involves conducting flame tests of metal salt solutions. The colour of each flame test can be used as a qualitative test to detect the presence of the corresponding metal salt. Refer back to this demonstration when considering the...
Recent Comments