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In this demonstration, learners compare the relative sizes and masses of scale models of the planets as represented by fruits and other foods.

Millions of organisms can live in and around a body of water.

In this indoor or outdoor water activity, learners pour water from small cups to large cups and containers. In doing so, they discover water takes the shape of its container.

In this activity, learners explore the size and scale of dinosaurs. Learners listen to "The Littlest Dinosaurs" by Bernard Most. Then, learners estimate the size of a Triceratops and T.

In this activity, learners investigate parallax, a method used to measure distances to stars and planets in the solar system.

In this activity, learners explore how anemometers work to record wind speeds and how the equipment has undergone engineering adaptations over time.

In this activity, learners shrink the scale of the vast solar system to the size of their neighborhood.

In this activity (located on page 4 of PDF), learners gain insight into the actual size of dinosaurs and practice making estimations and measurements.

In this activity, learners use their hands as tools for indirect measurement.

In this activity, learners make their own pinhole viewer in order to measure the size of the sun.

In this activity, learners help create and then navigate an outdoor course of the traditional "planets" (including dwarf planet Pluto), which are represented by small common objects.

How do scientists measure how clear or murky water in a lake is? How does water clarity (clearness) affect what lives in the lake?