Why do some materials sink to the core of a planet while others float to the crust? This experiment uses marshmallow fluff and molasses to illustrate the concept of planet differentiation.

A wide belt of asteroids lies between Mars and Jupiter, and was formed at the same time. If these asteroids had come together to form a 10th planet, what would it be like? Students investigate the answer.

Did it all start when an apple bopped Isaac Newton on the head? This activity explores some of the ways his fundamental laws are expressed in our dynamic solar system.

Throwing water balloons on school grounds in the name of science? Absolutely, if you do it safely, and apply what you learn to the science of finding and recovering meteorites.

What’s the universe made of? Scientists tackle this puzzle by studying the composition of the different objects contained in the universe. In this activity the object is the Sun, and the tools are the periodic table and a graph.

Can the universe be contained in colored sprinkles? Find out by using confetti or sprinkles to create samples that show the abundance of elements in different substances found in the universe.

Meteorites are pieces of ancient celestial bodies, some so old they contain particles that formed before our Sun existed. These resources engage learners to explore how our solar system works, and how scientists think it all began.

Meteorites reveal what's going on deep inside planets, including our own. Scientists analyze the composition of meteorites to match them with their potential parent bodies—other planets, asteroids, or possibly comets. These resources offer learners a look at the inner Earth, and more.

Countless impacts continue to shape Earth, other planets, and moons in our dynamic solar system. They can make craters of many sizes, which often provide clues to how the meteorites formed. These resources cover a range of topics, including an introduction to gravity and the evidence for life on Mars.