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