## Reflection: Developing a Conceptual Understanding Let's Have a Ball!-Size vs. Density - Section 3: Discussion

In this lesson, the students were given the opportunity to draw conclusions and really build a strong conceptual understanding about size vs. density when it comes to the buoyancy of the object. By testing several items with a variety of outcomes, the students had the chance to draw their own conclusions.

This experiment took some time.  I wanted the students to see a variety of scenarios played out, some where larger items floated and some where they sank and the same with small items.  They needed to think beyond the size of the object to be able to draw conclusions and cement their understanding that it is not what I see, but what I do not that that really impacts an objects buoyancy.

I was pleased with how the lesson went, but I really do want to find some type of ball that is larger and is made out of wood that floats.  I think this would help expand the students' understanding even further with this concept.  When you bring in an element of unpredictability, it really does help challenge the students' thinking.

Don't Just Tell Me-Show Me
Developing a Conceptual Understanding: Don't Just Tell Me-Show Me

# Let's Have a Ball!-Size vs. Density

Unit 6: Sink or Swim
Lesson 2 of 11

## Big Idea: Students often hold the misconception that since something is large, it will sink. The hands-on investigation allows students to explore this concept.

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35 minutes

### Joyce Baumann

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