Storm in a bot­tle

The Northern Star - - SCHOOL HOLIDAY ACTIVITIES -

CRE­ATE a vor­tex sim­i­lar to that cre­ated by a cy­clone.

You will need:

2 plas­tic soft drink bot­tles; a nail and ham­mer; water; food colour­ing; strong glue and mask­ing tape

What to do:

Re­move la­bels and lids from both bot­tles.

Join the lids of the bot­tles to­gether (flat sides to­gether) us­ing the glue and strong tape.

Us­ing the nail and the ham­mer, care­fully punch a large hole, at least 1⁄2cm in di­am­e­ter, through the mid­dle of the joined lids.

Fill one of the bot­tles with water and add some food colour­ing.

Screw the joined lids onto the full bot­tle and then screw the empty bot­tle onto the top of the full bot­tle. Wrap some more tape around the lids to make sure the seal is tight.

Turn the bot­tles up­side down so that the one full of water is on the top. Then move the bot­tles in a cir­cu­lar mo­tion so the water in­side starts to ro­tate.

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