Mr. Allen held out a glass of water with three ice cubes in it. “Why do things float?” he asked the class. No one said a word. The whole class was 1 . “Anyone?” Mr. Allen smiled at his students. “Let’s brainstorm some answers.” He swirled (旋动) the glass gently....
Why do things float? A study of the place for alternative models in school science.Selley, Nicholas
Why do things float in water is really a great question. In order to understand the concept, you will need to review the lesson about density, Archimedes' principle and buoyancy.Whether an object floats or sinks or does neither will depend on its weight or the force that pushes the object...
Babble Dabble Do has a fabulousship building activityto demonstrate how displacement helps objects float. Can youmake a superhero float? We made out superhero arm bands and a raft, Rainy Day Mum has a lovely activity usingboats made from pie tins. Try apirate themed sink and floatinvestigation...
Again, this test, just like the float test, can only tell you whether the egg is fresh or not, not if it’s gone bad. The conclusive tests that can tell you if your egg has gone bad are by visually inspecting it or smelling it. Thesmell of rotten eggsis unmistakable. If you break...
Why Would Stools Float? There are several reasons why poop floats and never seems to sink. Too much gas.You may have too much gas in you due to your diet, which can make your stools float. Some people think that floating poop is caused by fat, but it’s usually caused by gas. Rese...
Why Do Corpses Float Face Down? Most corpses are seen floating face-down. When a corpse drowns, it does so head first as the head is heavier (or has a high specific gravity) than the feet. This results in what is called the “drowning position.” The head faces down, with the arms...
If you fill a rowboat with five people and cargo, most likely it will sink depending on the total weight. However, if you fill a commercial fishing boat with the same amount of weight, it will float because its buoyancy (or ability to carry more cargo and displace more water) is so mu...
Due to salt's density, items float higher in the water. You can do this experiment with things you'll find around the house, and it's fun too. You'll keep bobbing along if you explore buoyancy! It's the perfect day for a daydream....
Why do astronauts float in the ISS?Image: The International Space Station (ISS) is placed in low Earth orbit, at an altitude of approximately 415 km, it circles the Earth in 90 minutes at a speed of 7.7 km/s or 27,700 km/h. The international crew, which is dedicated to scientific ...