One particular of my favored points to do these days is to trip bikes with my daughters. In some cases I even report these rides on Strava because my more mature daughter now wants to hold monitor of how quickly she can go down a little portion of road in our community (present document 10.5mph). When we had been using previously this 7 days she complained about the cracks in the pavement in 1 aspect of our community and requested, “why does the highway crack?”
I did my very best to solution my daughter’s problem of “why does the highway crack?” by explaining that there is a ton of water in the ground in our area. When that drinking water freezes it expands and pushes up on the pavement which then helps make it crack. She’s 6, so I’m not absolutely sure she pretty acquired it even when I designed the analogy to just one of our clay garden pots cracking for the exact reason very last winter.
As I practically usually do when my daughters inquire me a question that I haven’t considered about in a extensive time, I turned to YouTube in look for of a visual rationalization of why streets crack in the winter. Just after a tiny seeking I found this video clip from the Minnesota Division of Transportation. Soar to the 1:14 mark in the video to see an old visible of what comes about when moist soil freezes.
This matter is a terrific 1 for an animated rationalization. University student can use some basic animation tools to create an clarification of what happens when water and or soil freezes and pushes up against a mounted or rigid item. Sign-up for my new Animated Explanations system to understand how to develop and use animated explanations in your classroom.