As an interesting and diverse field, science is sometimes pursued by people simply for itself, but people are often motivated by purely practical concerns. For good science teachers, the job of teaching extends beyond simply explaining the techniques that make for good science but for instilling a sense of curiosity and intrigue into their students. In regards to experiments, teachers have several options available to them to choose from. One possible experiment requires using carbon dioxide, another experiment requires the teacher to buy ferro fluid, and the third requires the use of helium. In the following article, each of these possibly inspirational experiments will be examined in detail.
A fascinating gas, carbon dioxide is even able to be a useful ingredient in fire extinguishers. It also denser than the air around us, but that can be difficult to prove because it is invisible. There is, however, a perfect classroom experiment for demonstrating this quality of CO2. Start by folding a piece of cardboard or paper into a V-shaped ramp, and then adjust the ramp to sit at an angle. Then, place a lit candle at the bottom of the ramp and pour CO2 from the top of ramps toward the bottom. Students will be astonished as the CO2 puts out the candle, proving that it is heavier than air and can extinguish fire.
Ferro Fluid
Another interesting substance is ferro fluid, which is essentially a liquid magnet. Commonly found as a black, viscous liquid composed of a carrier fluid and iron particle, ferro fluid’s magnet properties can be viewed simply by placing a magnet near it. It is possible to buy ferro fluid at most supply stores, and it is most commonly used when a need for low-friction bearings arises, such as in most computer hard drives.
As everyone is probably aware, helium can have an amusing effect on anyone’s voice, but a controlled demonstration of its properties can prove to be even more fascinating. It is important to note, however, that containing helium in one’s lungs for too long can be dangerous to a human’s health, since we require oxygen to live. For teachers, helium can offer the opportunity to have an entertaining conversation about the effects that the density of different material can have on sound.
Conclusion
Any of these three possible experiments could serve as useful classroom applications for getting students interested in doing science. It can immensely valuable to provide students with this kind of inspiration, from these experiments, or from the teacher’s own invention. Whether the experiment is to buy ferro fliud and use it to view its magnetic properties, showing carbon dioxide flowing down a ramp, or increasing the human voice by an octave through inhaling helium, a teacher’s students will surely benefit from running experiments that are informative, inquisitive and entertaining.
A ferrofluid is made up of tiny magnetic fragments of iron put into oil. The oil helps to prevent any clumping from occurring. This particle is found in things that you may use everyday. Some of these include DVDs, CDs, radio speakers, sensors and more. Over time, this fluid will evaporate if not used. Keeping it sealed tight will help to prolong the life of the fluid so that you can use it again.
You can make your own magnet by following just a few simple steps. If you chose to purchase the liquid or fluid online, it is very expensive. If you are looking to make a ferrofluid yourself, all you will need is some magnetic ink and any oil that you may have lying around your home. Once mixed together, the ink that is near the oil will turn into a solid and become a magnetic field. It is recommended that you put the ink and oil together in a Petri dish. The fluid begins to get denser as the magnetic field becomes stronger. You should always put a plastic or latex glove on as you move your hand towards it more. You will be able to feel it getting more firm as you get closer to the magnet.
Ferrofluid is not dangerous or toxic, but it is not recommended for children to play with. Do not experiment with it around any nice things in your home and always make sure to wear old clothing that you will not mind being ruined. This fluid is very hard to wash out of anything and often causes permanent stains. You want to make sure to wear gloves and it is advised to wear some type of eye protection, such as goggles. Be sure to use dishes that are disposable in case they get close to the fluid and cause them to break.
Purchasing this fluid online can be very costly, as high as $180 for just one small bottle. If you do not want to spend that much money on this, it is recommended to get the procedures to make your own. Making your own may not be as good, but it will still do the job. The best recipe for this is to use iron-containing solutions, as steel wool does not work. Always make sure that the area that you are preparing this in is well ventilated. You can do it either outdoors or under a fume hood. This unique class of material will have you wishing you tried it sooner. You will be amazed at the nature and performance it can provide. There are some educational kits available to purchase if this is your first time and you want to make sure that you are preparing it correctly.
