For elementary children, the topic of "opposing forces" can be hard to understand. Friction is an opposing force that children can "feel." Here's a lab on measuring and comparing friction that's appropriate for older elementary children. You will need one piece of "science equipment" to get the most out of the lab . . . a spring scale. A spring scale with small increments will be easier for elementary children to use. Here's what to…
Cheryl TaylorMarch 30, 2014