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Floating & Sinking - Floating  Playdough / Modelling Clay Experiment
 

Can you make modelling clay float like a boat?

Materials you will need:

• Modelling clay or play dough
• Sink, bucket or clear vessel
• Water

 

 
Steps

1. Fill your container with water.

2. Place a ball of modelling clay / play dough gently into the water.

3. What happens to the ball of modelling clay / play dough?

4. Take the ball of modelling clay / play dough out of the water.

5. Take some more modelling clay / play dough and mold it into the shape of a boat.

6.  Now place your boat on the top of the water very carefully.

6. What happens with your boat of modelling clay / play dough?

  objects which float or sink     Floating or Sinking objects     floating or sinking things pic 3

  floating or sinking pic 4     items which may float or sink pic 5     will it float or sink - pic 6

What makes boats float?

Water supports a boat by pushing upwards on the bottom of the boat and therefore it does not sink.

Water cannot support a boat if it has a very heavy load.

A very heavy load would cause a boat to sink. Also, the shape of a boat plays an important role in floating.

If you rolled some modelling clay / play dough in the shape of a ball it would sink; but if you mold it into the shape of a boat it should float.

 
 
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