competitions & quizzes...pit your wits & win with Planet Science
magnetic mayhem quiz
Think you’ve got your bearings when it comes to North, South, East and West?
Well, see if can find your way through all 10 questions of our quiz…
If you can, you’ll go into the draw to win one of three amazing ‘Levitation Kits’ - it’s all done with magnets you know…
Ready ?
GOOD LUCK!
01 What causes the Earth's magnetic field?
The Earth's liquid iron core sloshing around as it spins.
Electric eels swimming in the Pacific Ocean.
A mountain of iron at the North Pole.
02 Which of the following objects is attracted to a magnet?
An aluminium drink can.
A rubber duck.
A steel drink can.
03 The location of the magnetic North Pole slowly drifts around. Whereabouts is it now?
In the Arctic Ocean in northern Canada.
The Sahara Desert.
The Bermuda Triangle.
04 MRI scans can produce images of inside the body by manipulating magnetic fields. What does MRI stand for?
Magnetic resonance imaging.
Massive reordering of isotopes.
Magnetic restructuring index.
05 The Earth's magnetic field periodically flips, which of the following is evidence for this?
Ancient magnetic rocks retain patterns of the old direction of the field.
Old homing pigeons forget the new direction and often get lost on the way home.
The hole in the ozone layer.
06 How does the Earth's magnetic field shield us from hazards from space?
It deflects asteroids that are on a collision course with Earth.
It deflects hostile alien probes, hiding our presence from them.
It deflects damaging high-energy particles from the Sun.
07 Which way would your compass point if you were at the magnetic North Pole?
It would point towards the equator.
It would spin round and round, very fast.
It would bend down towards the ground.
08 How could you magnetise a needle to make your own compass?
Stroke it from head to point with a magnet repeatedly.
Bend it into an L-shape, leave for a week, then unbend.
Hold it close to a cassette recorder which is on record.
09 Why might dropping a magnet stop it from working?
The sudden action of gravity disrupts the magnetic field.
It realigns itself with the Earth's magnetic field.
The force of impact disrupts the alignment inside the magnet.
10 Which of the following might demagnetise a magnet?
Putting it in the freezer.
Leaving it in the dark for a month.
Heating it up.
Answers:
1= The Earth's liquid iron core sloshing around as it spins • 2= A steel drink can • 3= In the Arctic Ocean in northern Canada • 4= Magnetic resonance imaging • 5= Ancient magnetic rocks retain patterns of the old direction of the field • 6= It deflects damaging high-energy particles from the Sun • 7= It would bend down towards the ground • 8= Stroke it from head to point with a magnet repeatedly • 9= The force of impact disrupts the alignment inside the magnet • 10= Heating it up •
<< Go Back