Reflection: Connection to Prior Knowledge 100 Trillion Cells - How Do We Know That? - Section 3: Students in Action


Students do not always have the prior knowledge needed to understand how scientists can say with certainty that there are approximately a 100 trillion cells in a body.

The counting rice activity, helps develop background knowledge created by the students themselves that will help them make the leap to understanding how scientist estimate large numbers.

Once students have this understanding, it can be applied to estimating populations or even crowds at concerts! 

  From Rice to Cells
  Connection to Prior Knowledge: From Rice to Cells
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100 Trillion Cells - How Do We Know That?

Unit 5: Mitosis
Lesson 1 of 3

Objective: SWBAT demonstrate a method for counting large numbers of things using estimating.

Big Idea: Students will use a pound of rice to discovery how scientist can estimate large numbers of cells.

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