Reflection: Student Ownership Density of Water - Section 3: Students in Action

 

I love how this lesson confirms student predictions for the density of water in the previous lesson - Float, Suspend, Sink.

In Float, Suspend, Sink, students were asked which of the examples; a canister that floats, one that is suspending in water or one that sinks is most likely the same density as water. My students unanimously predicted that the canister that was suspending in water was most likely the same density as water. The density of the suspended canister was calculated to be 1 g / 1 cm3.

In this lesson students calculated the density of water to be 1 gram / 1 ml.

Next students made the connection between the displacement of 1 milliliter by 1 centimeter cube. Now students can make the connection between units to understand that the density of water can be expressed as 1 g / 1 ml or 1 g / 1cm3

The combination of the two lessons goes a long way to help students trust their own instincts in science. They have made an observation, reflected on its meaning and made a prediction. The students own this information because they made the discovery by connecting the new information with prior learning. The lessons combine to develop student understanding with their own aha moment in science.

This discovery validates the student prediction! Students are less likely to harbor misconceptions when they have the opportunity to reflect upon their own evidence.

  Students Making Connections!
  Student Ownership: Students Making Connections!
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Density of Water

Unit 1: Density
Lesson 4 of 7

Objective: SWBAT gather the data they need to calculate the density of water and identify the source of the units gram and centimeter cubed.

Big Idea: Understanding that a centimeter cube will displace one milliliter of water builds the foundation to understand how the volume of an object can be determined by the displacement of water.

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