Sink vs. Float


   I hope everyone is enjoying their nice long weekend!  This past week my students and I did our class project for the science fair.  We worked together in small groups to decide if an object would sink or float.  Before the experiment began, we looked at all of the objects together, and hypothesized about their ability to float.
The students took their paper outside, and tested the objects by dropping them in to buckets of water.

We recorded our learning, and then came back inside to discuss what we had discovered.  The kids always love this experiment (who doesn't like to dip your hands into buckets of water at school?).  Feel free to click on the image above to get the free recording sheet to do this experiment with your class.

My husband and I just got back from Big Bear, California on a surprise birthday trip for one of our good friends.  I am super exhausted, but we had a great time.  The weather here has been ridiculously warm, so Big Bear did not have any snow (well, nature made anyways), but we had an amazing time drinking wine and playing games, and our dogs absolutely loved it!



  1. I am doing a student teaching lesson next week on sink or float. However, I am worried about the questioning part of the lesson. How do you explain to kindergarteners why some things sink or float?

    1. Hi Natalie!
      I don't get too much into the mechanics of why things sink vs. float with kinder kids, but you can show them a YouTube video like this:

      Or grab a book from Amazon like this:

      I like to use either a video or a book before I begin the lesson so that my kids can get some extra visuals, and some good science talk from the professionals : )

      Good luck with your lesson! Let me know how it goes!