Chapter 9 - Comparing Kinds of Matter
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.
This "heavy" experiment allows students to discover that salt water sinks in fresh water.
Did you know miners must dig up and process as many as 30 tons of rock to make a single gold ring? Take a dazzling look at how gold is mined and transformed.
Hands-on Activity, Classroom Activity
In this hands-on experiment, students create a neutrally buoyant "diver" and then observe the effects of increased water pressure.
Young Naturalist Awards Essay
While on an internship in Washington State, this New York senior collected over 36 pounds of rocks. See what he learned about their oxidation potential compared to similar rocks in New York.
If you've spent even a few hours in a pool, you know that the deep end is colder than the shallow. But do you know why? Experiment with colored ice cubes for insight into water density.
Peer at the world through the eyes of Einstein—a scientist who saw a beam of light and imagined riding it, a self-proclaimed "citizen of the world" who spoke out on global issues from pacifism to racism.
November 15, 2002 - January 1, 2003