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This investigation provides learners with a hands-on activity that simulates the changing relationship of surface areas-to-volume for a growing cell.

In this activity, learners make a scale model of the Solar System and learn the real definition of "space." Learners use the online calculator to create an appropriate scale to use as a basis for thei

In this activity, learners investigate the relative growth of lengths, areas, and volumes as cylinders are scaled up.

In this activity, learners create a model using metric measuring tapes and atmosphere composition data.

In this activity, learners build a scale model of the solar system using a roll of toilet paper.

Learners build a model of the planets in the solar system. In their model, the planets are spaced in their relative distance from the Sun.