Let's look at a few assessment scenarios. Try to determine what type of assessment is being used, formal or informal. 1  Example 1. 2  A kindergarten teacher sets aside the first 15 minutes of every day to allow students to explore, play or engage in any activity of their choice.
Chemical bonds are made or broken in order to create a new molecule. One example of a chemical reaction is the rusting of a steel garbage can. That rusting happens because the iron (Fe) in the metal combines with oxygen (O2) in the atmosphere. Chemical bonds are created and destroyed to finally make iron oxide (Fe2O3).
a chemical reaction is a process that is usually characterized by a chemical change in which the starting materials reactants are different from the products chemical reactions tend to involve the motion of electrons leading to the formation and breaking of chemical bonds b ab the combination of iron and sulfur to form iron ii sulfide is an example of a synthesis reaction 8 fe s 8 8 fes chemical decomposition or analysis reaction in a decomposition reaction a compound is broken into smaller chemical species