This demonstration shows some differences between potable (drinkable) water and non-potable (non-drinkable) water. Variations in temperature, turbidity and pH level also determine the types of microorganisms that can thrive in each water sample. After the demonstration, students will be able to hypothesize why different types of water can cause illnesses and even death in humans.
Categories: Teacher Demonstration
In this demo, a polyethylene strip is charged by rubbing with wool. The charged strip is then used to make paper circles stand on their edges inside a Petri dish. This demo introduces students to the... read more
This activity is a good opportunity for students to exercise their hypothesis-generating skills, practice making quantitative observations, and apply what they have learned about the fire triangle... read more
Some examples of simple but effective activities to help students understand better concepts identified as being challenging. Here are examples that might help you with Sig Digs, Kinematics, and... read more