Digital Magazine "Maths and Science Adventure" Digital Magazine "Maths and Science Adv_1st issue | Page 31

DIG IT AL MAGA ZINE „MA T HS A ND SC IENC E ADV ENT UR E” PAGE 31 Materials from the meeting in Finland Initial test of physics for the students Answer these questions together as a team. Only one option is the right answer. 1.Gyroscope is A. similar to certain kinds of toys, like beyblades and yo-yo’s. B. a n optical device, using a rotating mirror. C. a magnifying glass. D.a device that turns electrical energy to kinetic energy. E. a theoretical device, that once started will never stop. 2.During winter in Finland, all the major roads get some salt on the roads. This is done so that A. the salt increases friction, making it easier to drive. B. the temperature of the ice gets higher, and melts away. C. the animals keep away from the roads, because the salt tastes bad. D. the melting point of the water gets lowered. E. the cars get a protective layer from the snow, and they wont rust so quickly. 3.A magnet gets dropped inside a metal tube. The magnet falls through it slowly. A. This is because the magnet is attached to the metal. B. This is because the earth makes a magnetic field inside the tube, which slows the magnet down. C. The motion of the magnet repels itself, because the tube is made of metal. D. None of the previous options are correct. 4.Electromagnetic induction can be used A.to lower the speed of trains without any friction. B. to push objects away from each other without them touching. C. to detect metal objects buried in the ground D. to all of the previous options. 5.Burning candle transforms the chemical energy of the wax to light and heat. A. The heat released can be transformed into kinetic energy. B. Most of the heat from the candle gets wasted. C. The smoke from the candle is parts of the wax that cannot burn. D.All of the previous options are correct. 6.Electric field A. is the same field that wifi-routers use to share wireless internet. B. can be used to only move objects that have an electrical charge. C. is the same as magnetic field. D. can be formed without any technical devices. 7.Resonance is a phenomena A. that causes similar objects to transform energy between each other. B. in which vibrations can move from one place to another. C. that causes objects to vibrate in a harmful way. D. that applies to all of the previous options. 8.If the frequency of 2 tuning forks is almost the same, then A. there is no resonance between them. B. their sounds will interfere with each other. C. when they are played at the same time, you can’t hear that their frequencies are different. 9.Pendelum is basically a weight attached to a string that has been pushed. A pendelum oscillates back and forth in a certain time. A. If the string is longer, then the speed of the oscillation is bigger. B. If the string is longer, then the time for one oscillation is longer too. C. If the string is longer, then the time and speed stay the same. D. None of the previous options are correct. Antti Pekkala, Finland