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).
Bubbles, and heat change are examples of chemical reactions. When a chemical reaction happens, a compound is formed. It cant be separated.Another example could be change of colour.atteries: Chemical reactions within batteries produce electrons called electrochemical reactions. Halloween Lightsticks: A chemical reaction excites atoms causing the stick to glow. Homemade Volcano: When baking soda and vinegar are combined, they erupt as carbon dioxide gas is released.