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).
Answers: 4 examples of a chemical reaction would be: -formation of a precipitate-colour change-formation of a gas(bubbles) -temperature increase. Question: and u better have the rite answer. Answers: There are a lot of signs showing a chemical reaction has occurred.Here are four: Formation of a precipitate, change in color, increase or decrease in temperature, bubbles. Question: In a lab, silver nitrate, AgNO3, is dissolved in water until no solid is observed in the container.)The lack of temperature change indicates a chemical reaction didn't occur. 4) A chemical reaction did occur when the solutions were combined. 5) The color change of the solution indicates a chemical reaction occurred. 6) A chemical reaction occurred when silver nitrate was added to water.