Last week, the Whangarei Fire Brigade visited our school to show us how 'foam' is produced. Foam is a mixture of three parts: foam concentrate, water and air. It is mainly used as a blanket to control the spreading of fuel in an accident or in a natural disaster. The firemen spread the foam using a special machine onto the field. The foam looked like puffs of white clouds. The firemen then chose one child from each whanau to dissolve the foam using normal water sprayed from the fire truck. There needed to be several children to hold the fire hose because of the pressure of the water. The end result being that the children saw how foam was made and then ‘changed’ (or dissolved) through adding water. Special thanks to Fire Officer Ron Wilson and his crew for their time.
No comments:
Post a Comment