Math and science
Shape Detective
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Thinking sheet · Math and science
Float or Sink?
Predict which objects will float, test them in water and draw what surprised you.
- Grades
- K–3
- Time
- about 25 minutes
- Topic
- Math and science
- Kids practice
- predicting, testing ideas, recording results
What kids do
“Guess first, then test. Will it float or sink?”
- Predict, then test
- Draw the biggest surprise
- Things that float are often…
How to run it
- Use a tub of water and safe objects: a cork, a coin, a crayon, a leaf, a spoon, a sponge.
- Write predictions before any testing.
- Mark correct predictions with a star, not wrong ones with an X.
Talk about it
- Which result surprised you?
- Does size decide if something floats?
- How could we make something that sinks float?
Take it further
Make a foil boat and count how many coins it holds before it sinks.
Pairs well with
Free for home and classroom use. Print as many copies as you need.
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