{"id":52861,"date":"2025-09-22T04:48:11","date_gmt":"2025-09-21T19:48:11","guid":{"rendered":"https:\/\/phys-edu.net\/wp\/?p=52861"},"modified":"2025-09-22T04:48:11","modified_gmt":"2025-09-21T19:48:11","slug":"crystal-clear-science-making-crystals-in-your-kitchen-to-see-how-volcanic-and-plutonic-rocks-are-born","status":"publish","type":"post","link":"https:\/\/phys-edu.net\/wp\/?p=52861&lang=en","title":{"rendered":"Crystal Clear Science: Making Crystals in Your Kitchen to See How Volcanic and Plutonic Rocks Are Born!"},"content":{"rendered":"

Hello! I’m Ken Kuwako, your Science Trainer. Every Day is an Experiment!<\/strong><\/p>\n

Have you ever taken a really close look at a rock on the side of the road? Some sparkle with large, glittering grains, while others are dull with tiny specks. Believe it or not, these visual differences hide a grand drama deep within the Earth, where hot magma cools and solidifies. In middle school science, we learn about “igneous rocks” \u2013 rocks formed when magma cools and hardens. But why do “volcanic rocks” and “plutonic rocks” look so different?<\/p>\n

The key to unlocking this mystery lies in the “difference in how magma cools.” This time, I’m thrilled to share a special crystallization experiment that unravels the secrets of rock formation using sodium thiosulfate (commonly known as hypo or dechlorinator), which you can easily find at home!<\/p>\n

Through this experiment, you’ll compare how crystals form when cooled quickly versus slowly. The difference in texture between volcanic rocks (porphyritic texture) and plutonic rocks (granular texture) will magically appear right before your eyes!<\/p>\n

One type of volcanic rock (andesite).
\nIt has scattered large crystals within an aggregate of smaller crystals.
\n\"\u5b89\u5c71\u5ca9\u306e\u62e1\u5927\u5199\u771f\"<\/p>\n

One type of plutonic rock (diorite).
\nCrystals of roughly the same size are densely interlocked.
\n\"\u9583\u7dd1\u5ca9\u306e\u62e1\u5927\u5199\u771f\"<\/p>\n

I faced a lot of trial and error at first, but after many experiments, I got the hang of it, and now it’s a guaranteed success in my classes. In this article, I’ll share the preparations, procedures, and the “magic touch” for success, all based on my experience!<\/p>\n

What You’ll Need for the Experiment (You can find these at home or in the science lab!)<\/p>\n

\u203bAll items are relatively easy to find in a science classroom or at home.<\/p>\n