Download
1 / 9
90 likes | 210 Views
Flight Project. L.I. To discover that air pressure is acting all around us; and to carry out experiments that demonstrate that fact. What is air pressure? Air pressure is the force exerted on you by the weight of tiny particles of air (air molecules ).
E N D
L.I. To discover that air pressure is acting all around us; and to carry out experiments that demonstrate that fact. • What is air pressure? • Air pressure is the force exerted on you by the weight of tiny particles of air (air molecules). • Air molecules are invisible, they still have weight and take up space. Since there's a lot of "empty" space between air molecules, air can be compressed to fit in a smaller volume.
L.I. To discover that air pressure is acting all around us; and to carry out experiments that demonstrate that fact. • What is air pressure? • When it's compressed, air is said to be "under high pressure". Air at sea level is what we're used to, in fact, we're so used to it that we forget we're actually feeling air pressure all the time! • An important thing to remember is that higher pressure always PUSHES things around.
L.I. To discover that air pressure is acting all around us; and to carry out experiments that demonstrate that fact. • What is air pressure? • An interesting thing happens when you change a pocket of air pressure – things start to move. • This difference in pressure causes movement and is what creates winds, tornadoes, airplanes to fly, and some of the experiments we will conduct shortly.. • Another interesting phenomenon occurs with fast-moving air particles. When air moves fast, it doesn’t have time to push on a nearby surface, like an airplane wing.
L.I. To discover that air pressure is acting all around us; and to carry out experiments that demonstrate that fact. • What is air pressure? • It just zooms by, barely having time to touch the surface. The air particles are really in a rush! • When air zooms by a surface – the fast air has no time to push on the surface and just sit there, so not as much air weight gets on the surface.
L.I. To discover that air pressure is acting all around us; and to carry out experiments that demonstrate that fact. • We will be conducting experiments today so that we can discover how air pressure works all around us. • Our first experiment is......... • http://www.studyladder.co.uk/resources/teacher/search?terms=egg+in+a+bottle&course_id=0
L.I. To discover that air pressure is acting all around us; and to carry out experiments that demonstrate that fact. • Our second experiment is.........The Balsa Wood Experiment • Explanation – why does this happen? • This happens because reducing the surface area of the paper also reduces the column of air that is pressing down on the paper. This allows the balsa wood to flip the paper without snapping.
L.I. To discover that air pressure is acting all around us; and to carry out experiments that demonstrate that fact. • Our next experiment is.........Plumber Magic • Why does this happen? • When you rammed the two plungers together, air was forced out of the cavity that the insides make when pushed together, leaving you with a lower air pressure pocket inside, compared to the surrounding air pressure. • Higher air pressure ALWAYS pushes and thus is keeping the plungers together.
L.I. To discover that air pressure is acting all around us; and to carry out experiments that demonstrate that fact. • Our final experiment is.........Magic Water Glass Trick • Why does this happen? • The card stays in place because air is heavier than water.
