A single of my favored issues to do these times is to ride bikes with my daughters. Often I even file these rides on Strava due to the fact my older daughter now wants to continue to keep keep track of of how quickly she can go down a tiny area of street in our community (present-day record 10.5mph). When we had been riding before this week she complained about the cracks in the pavement in one particular element of our neighborhood and asked, “why does the highway crack?”
I did my finest to respond to my daughter’s dilemma of “why does the highway crack?” by explaining that there is a lot of drinking water in the ground in our space. When that water freezes it expands and pushes up on the pavement which then can make it crack. She’s 6, so I’m not positive she very received it even when I made the analogy to one particular of our clay backyard garden pots cracking for the exact same reason past winter.
As I pretty much normally do when my daughters talk to me a issue that I haven’t believed about in a very long time, I turned to YouTube in lookup of a visible clarification of why streets crack in the wintertime. Immediately after a little hunting I discovered this video from the Minnesota Division of Transportation. Leap to the 1:14 mark in the online video to see an aged visible of what transpires when moist soil freezes.
https://www.youtube.com/enjoy?v=fkrrSys03qQ
This subject is a good 1 for an animated rationalization. Student can use some straightforward animation tools to develop an clarification of what transpires when water and or soil freezes and pushes up from a fastened or rigid object. Sign up for my new Animated Explanations training course to master how to generate and use animated explanations in your classroom.