Composting bottles: Balloons inflated with gas released from Bacteria decomposing fruit scraps!

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Science experiment! Composting bottles: Balloons are inflated by gases released from bacteria decomposing fruit scraps!

Bottle 1 (yellow balloon): banana peels and banana pieces
Bottle 2 (orange balloon): orange peel and pulp
  
Results: The orange peel and pulp is decomposing at a much faster rate than the banana releasing ethylene gas! Due to the higher moisture content than the banana; which bacteria is attracted to and thrives in best.

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A polymer is a really big molecule made of little molecules linked together. When we placed the tiny marbles (2 millimeter in diameter each) in water, they expanded up to 10 times from its original size measuring from 10 mm 20 mm (1/4 to 3/4 inch) in diameter. Each marble can hold up to 300 times its weight in water.

The marbles bounce, because polymers are elastic like rubber. These marbles can be used for decoration.

That was little Nick making silly noises :-)