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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.

In this activity, learners model the gravitational fields of planets on a flexible surface.

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

In this space science activity, learners work together to create a human-powered orrery to model the movements of the four inner planets.

This is a classic exercise for visualizing the scale of the Solar System.

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

In this activity, learners take measurements and create charts to learn about the size of dinosaurs and their relative scale to humans.

In this activity, learners investigate the concepts of relative size and distance by creating a basic model of the solar system.

In this activity, learners explore the size and scale of dinosaurs. Learners listen to "Dinosaurs, Dinosaurs" by Byron Barton to understand some background information about dinosaurs.

In this activity, learners plan and create a 24-foot long, two-dimensional model of our solar system, and compare and contrast the differences between planets and the sun.

In this activity, learners create their own archaeological profiles.

In this activity, learners explore how distance can affect the way we perceive the size of an object.

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.

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.

In this activity, learners observe colors in the flame of a burning candle to explore connections between matter, light, color and temperature -- basic concepts of matter and energy.

This activity provides a hands-on experience with a scale model, a relatively high viscosity fluid, and feeding behaviors.

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 explore the relative sizes and distances of objects in the solar system.

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