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Did you know.....?
.... that every tonne or paper recycled saves 17 trees!
....a mosquitos wings flap about 300 times per second!
....one litre of oil spilt in the ocean can contaminate up to 2 million litres of water!
....your heart beats about 100,000 times in one day and about 35million times in a year!
....it is 98% more enrgy efficient to recycle an aluminium can that to make a new one from scratch!
What can you tell us? Every month we will update our list with facts from our Mad Scientists - just email us a fact, your name and age and the MADDEST facts will make our list! madscience@batelco.com.bh
DECEMBER 2010
SANTA COPTER
What you need:
-
Santa Copter
-
Scissors
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Paper clip
What you do:
-
Print Santa Copter.
-
Cut among the solid lines
-
Fold along the dotted lines and bend up the end of the strip.
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Fold one rotor in one direction and the other in opposite direction.
-
Drop your Santa Copter!
-
Optional: Attach a paper clip to the bottom of the helicopter
What’s going on? -
As the helicopter falls,
air rushes out from under wings causing it to rotate. At the same time air hits
the body of the helicopter, pushing it forward which results in rotating
action.
-
Air pressure is all around
the helicopter, just like it is all around us.
-
The air pressure pushes
down on the top of the helicopter causing it to fall, it pushes up on the
bottom of the helicopter causing it to hover slightly as it falls and it pushes
against the body of the helicopter causing it to spin and it falls to the
ground.
-
Paper clip gives more
weight to the helicopter making it spins faster.
-
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