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One in every of my favourite issues to do as of late is to trip bikes with my daughters. Typically I even document these rides on Strava as a result of my older daughter now desires to maintain observe of how briskly she will be able to go down just a little part of street in our neighborhood (present document 10.5mph). After we had been using earlier this week she complained concerning the cracks within the pavement in a single a part of our neighborhood and requested, “why does the street crack?” I did my finest to reply my daughter’s query of “why does the street crack?” by explaining that there’s a lot of water within the floor in our space. When that water freezes it expands and pushes up on the pavement which then makes it crack. She’s six, so I am undecided she fairly bought it even after I made the analogy to one among our clay backyard pots cracking for a similar cause final winter. As I nearly at all times do when my daughters ask me a query that I have never thought of in a very long time, I turned to YouTube looking for a visible rationalization of why roads crack within the winter. After just a little looking out I discovered this video from the Minnesota Division of Transportation. Leap to the 1:14 mark within the video to see an previous visible of what occurs when moist soil freezes.
This matter is a good one for an animated rationalization. Pupil can use some easy animation instruments to create a proof of what occurs when water and or soil freezes and pushes up towards a hard and fast or inflexible object. Register for my new Animated Explanations course to discover ways to create and use animated explanations in your classroom.
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