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Materials Float Sink Experiment

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Materials Float Sink Experiment

Can you predict which objects will float or sink? With an adult, fill a bowl with water. Test one small object at a time, then dry it. Keep water away from electrical items. Try the objects in the results grid, or use safe objects made from the same materials.

Predict

Look at each object. Before testing, decide what you think will happen.

1.Circle your prediction: A small wooden block placed gently on water will…
  • float
  • sink
2.A metal teaspoon placed gently on water will…
  • float
  • sink
3.Which object do you predict will float: a cork or a metal spoon? Tell why you think so.

Test and record

Place each object gently in the bowl. Watch carefully, then mark what happened in the grid. Results can change with the object's shape and size.

Object: cork Result: ____

Object: metal spoon Result: ____

Object: wooden block Result: ____

Object: plastic building brick Result: ____

4.After testing, did your wooden block do what you predicted? Choose one.
  • Yes
  • No
5.What did you notice about the cork and the metal spoon in the water?

Think like a scientist

Scientists observe carefully and use what they find out to make new predictions.

6.The small wooden block floats. What do you think a larger wooden block might do in water?
  • float
  • sink
7.An object feels hard. Does that always mean it will sink? Choose one.
TrueFalse
8.Choose one more safe object to test. Draw it in the box and finish the sentence: “I think it will…”
Draw your object and show where you think it will be in the water.

3 printable pages

  • Materials Float Sink Experiment, page 1 of 3: Predict, Test and record

    Page 1

  • Materials Float Sink Experiment, page 2 of 3: Think like a scientist

    Page 2

  • Materials Float Sink Experiment, page 3 of 3: Draw your object and show where you think it will be in the water.

    Page 3

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