Sink or Float
Young children are constantly in a mode of exploration. They discover new things about the world around them on a daily basis. And, although they can often make connections without any intervention from adults, as a parent, you can also initiate activities in which discovery is guaranteed.
One concept that can be perplexing for children is sinking or floating. (Actually, this concept can be difficult for adults as well!) There is no need to go into any scientific formulas about density and displacement. Simply give your child the opportunity explore and observe what takes place when different objects are placed in water.
Bath-time lends itself nicely to these experiments. Provide your child with various objects that will sink or float (some examples: a marble, toy boat, coins, plastic lid, corks, key, pencil, etc.) Begin by showing her how one object will float and another object will sink. Then, one at a time, go through the remaining objects you have gathered and ask her to predict what she thinks will happen when the object is placed in the water. Once all of the objects have been tested, ask her why she thinks some objects float and some objects sink (It is okay if she doesn’t quite understand. A basic idea of heavy objects usually sink and light objects usually float is a pretty good start for a preschool child.) Finally, ask your child to think of other objects that may sink and other objects that may float. Extend the activity by letting her gather items from around the house to test.
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Written by BRWI Staff on January 13, 2010
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