So the air flows around the ball.Īn alternative explanation is provided by the Bernoulli principle. The air would then flow into the low-pressure air shadow. This air shadow would be a region of low pressure. An “air shadow” would be formed above the ball. Why does air follow the surface of the sphere? Consider what would happen if the air did not curve around the ball. In the same way, the air that arcs around the side of the ball exerts less force on the ball. The force the rider exerts on the seat decreases as the car goes over the top of the hill. People immediately raise several questions when they hear the second explanation: Why does air flowing over a surface in an arc exert less pressure on that surface? To answer this question, consider a rider on a roller-coaster car going over the top of a hill at high speed. This explanation is based on Newton’s law of action and reaction.Īnother way of looking at this is that as the air arcs around the ball, the air pressure on the ball decreases, allowing the normal atmospheric pressure of the calm air on the other side of the ball to push the ball back into the air stream. This outward-flowing air exerts an inward force on the ball, just like the downward flow of air beneath a helicopter exerts an upward force on the blades of the helicopter. Air rushes in an arc around the top of the ball and then continues outward above the ball. When you pull the ball partially out of the air stream, the air flows around the curve of the ball that is nearest the center of the air stream. The high-pressure region of air under the ball holds the ball up against the pull of gravity. In this example, let students create a project and see it through to the end and then talk about how the actions they took throughout relate to the scientific method.When the ball is suspended in the air stream, the air flowing upward hits the bottom of the ball and slows down, generating a region of higher pressure. Instead, find ways to allow the learning to happen and then relate it to what you need them to know. While the scientific method is great and important for students to understand, it can be too restricting for some students. Allow Learning to Happen Naturallyĭon’t force students to follow a strict set of rules for how they will learn, instead let them find their own way along the path. By allowing them to explore that idea in a constructive way, you may find that it is more related to the lesson than anyone originally thought. Sometimes in the course of a lesson, a student might have a great idea that is only tangentially related to the course. This goes along with the above idea of letting kids make mistakes. It’s rare to get things right the first time and learning how to deal with failure, and using it to inspire the next idea, is incredibly important for developing minds. If students are never given the chance to try out an idea you know won’t work, they’ll never learn why it doesn’t work. Photo Credit: RPG4 Let Students Make MistakesĪ large part of learning is trying out different ideas and seeing what works. What follows is a dive into some of the most important lessons all educators can learn from Ms. Frizzle can teach us about how to approach science education, and really any form of maker education for that matter. As such, she takes a look at what The Magic School Bus and Ms. Baker talks about how she doesn’t remember anything about her childhood science classes, but can remember every episode of The Magic School Bus. Frizzle's Own Magic.” In the article, Ms. On a recent day of catching up on my reading, I stumbled upon an article by Amanda Baker titled, “ Recognizing Ms.
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