Because of these differences in measurements, an earthquake with a low Richter magnitude reading that occurs in a densely populated area like Los Angeles can actually have a higher Mercalli value or intensity than a high-magnitude quake in a desolate region like Antarctica. W. H. Freeman. Earth Magazine, pp. Shake tables in the classroom. Science Teachers Bulletin, pp.
Earth is change.
Engineers and architects try to design buildings rigid enough to withstand the shock, but flexible enough to give a little under the stress. Before building your models, you must first build a shake tray. Place one cardboard box on a table and, with the scissors, cut the bottom out of the second box so that it fits inside the first box with a 2-cm clearance around each side. Place the marbles in the first box and rest the cut piece of cardboard on top of them. Use the stapler to attach one rubber band to each inside corners of the first box and then to the corners of the cardboard insert.