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Float and Sink Experiments


Float and Sink Experiments

[20 Minutes]

Water and children are a natural combination. Stand back and watch as your child experiments with ways to make floating things sink and sinking things float.

You'll need:

• basin of water • leaf • rock • button • crayon • feather • screw • string

What to do:

  1. Together with your child, gather objects that will float or sink. Test the objects you have chosen to see whether they sink or float.
  2. Invite your child to take one of the objects that sinks, for example a screw. Ask him, "Why does the screw sink?"
  3. Invite him to place a feather in the water. Before he puts it in the water, ask him, "Do you think the feather will sink or float?" The feather will float at first.
  4. Then ask him, "Why did the feather sink?"
  5. Challenge your child to try each of the other objects and ask him to predict whether or not it will sink or float and why.

How to use:

You may want to help your child make a list of things that sink and things that float. Each time he experiments with an object, encourage him to add it to the sink or float list.

Let's Talk: Ideas to Explore Together.

  • Were you able to guess which objects sank and which objects floated?
  • Can you think of other objects to add to our sinking and floating list?

Useful information:

While you are having fun together, this activity provides experiences for developing concepts related to science.

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