group+four

Second we closed the hole with a sticky tape, than we put the fine sand in the bottle.
==== Now the bottle can be suspance at 3/4 meters at the floor. The experiment took place in the gym. Miss Elisa tied the bottle to a pole and after for see the moviments to the bottle, we put a yellow cardboard under this. ====

We had to face some problems: the sand was wat and the teacher put the sand in the oven...than the bottle was wat too and Miss Elisa drided the bottle whit the hairdry.
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