Quartz crystals commonly occur in nature.
A crystal is a form of matter in which the atoms, molecules, or ions are arranged in a highly ordered three-dimensional lattice. Crystals are also called crystalline solids because most crystals are solid. However, liquid crystals also exist. The word “crystal” comes from the Greek word krustallos, which means both […]

What Is a Crystal? Definition and Examples   Recently updated !

Galungung volcanic eruption
Volcanic lightning is an electrical discharge produced by a volcanic eruption. Because the static electricity is produced in an ash plume rather than a cloud, volcanic lightning is sometimes called a dirty thunderstorm. History The earliest historical record of volcanic lightning came from the ancient Roman, Pliny the Younger. He […]

How Volcanic Lightning Works

Icelandic Blue Striped Iceberg
Most icebergs are white, but they occur in a wide range of colors, including blue, green, yellow, black, and striped. The colors depend on the amount of air in the ice and whether it contains any impurities. Iceberg color changes over time. Exposure to air and sunlight can erode the […]

What Color Is an Iceberg?

Word search puzzles are a fun way to learn glossary terms for a subject. This word search has a hot set of glossary terms dealing with volcanos and vulcanology. Find volcano-themed words from the list forward or backward in vertical, horizontal, and diagonal directions.  The puzzle is optimized to fit […]

Volcano Word Search