Pre-K to Grade 2
From slow creeping continents to ground-splitting quakes, the Earth is constantly changing. Take a peek at our planet's layers, learn what secrets rocks reveal, and gain a long view of history.
Jade has been used by people around the world for thousands of years—first to make tools, later to create precious works of art. Take a peek into mineralogist George Harlow's scrapbook to see why he thinks this rock is so special.
Mundo Shamundo! With the help of these magic words, the Amazing Mundo can literally reverse the sands of time. Watch him transform worldly objects ... back into rocks in this fun comic strip.
Surrounding Earth is a layer of air, the atmosphere, where conditions are always changing. Try your hand at predicting weather patterns by making a wind vane, a rain gauge, and a barometer.
What is the gold standard? How does an alloy differ from a compound? And what happens when a metal tarnishes? Find out with this glossary from "alloy" to "volume."
Experience the California Gold Rush. Examine gold in its pure and refined forms. And find out how gold has shaped civilizations throughout history.
How does gold form and what does it take to extract it from the earth? You'll find everything from colorful field guides to tales about the quest for gold in this list of kid-friendly titles.
Want to learn more about the legged and legless lizards known as squamates? You'll find everything from colorful field guides to tales of unusual behavior in this list of kid-friendly titles.
Search a database with more than 8,300 reptile species. Learn about amphibian biology and conservation. Review the evolutionary history of squamates. And find hands-on science activities.
Explore the McLaughlin gold mine in Northern California. See the first metal coins, which were created in the Middle East around 600 BC. And investigate the properties of gold.