Short demo: The fan in a vacuum pushes air out, creating a system of low pressure. This in turn creates a system of low pressure within the bag, allowing for an entertaining demonstration of the power ...

The new question-of-the-week is: What is the single most effective instructional strategy you have used to teach science? This post is part of a longer series of questions and answers inviting ...

You have /5 articles left. Sign up for a free account or log in. Faculty searches are labor-intensive tasks. Committee members must review materials from dozens of ...