Pumice is a low-density volcanic rock that consists of highly vesicular, rough, textured, volcanic glass, which may or may not contain crystals. It is typically light colored. Pumice is created when super-heated, highly pressurized rock is violently ejected from a volcano. The unusual foamy configuration of pumice happens because of simultaneous rapid cooling and rapid depressurization. This simultaneous process freezes bubbles from gases being dissolved in the lava and preserves them in a matrix, which gives pumice its highly porous texture. Pumice's highly unique process of formation yields an extremely low-density rock; in fact, pumice is the one and only rock that will not sink in water! Pumice floats and bobs along the surface where other rocks would sink to the depths. Great for understanding density and can be used in classroom experiments.
Included: one 1" chunk of pumice
Highly durable lab apron made of rubberized cloth is impermeable and easy to clean, perfect for all manner of lab or classroom experiments
These goggles meet the ANSI Z87.1, 2010 High Impact standards.
Durable, anti-fog safety glasses that fit comfortably on any head size.
Recommended for protection against chemical splashes. A must have for every young chemist!
Extra-large nitrile exam gloves designed and manufactured for superior protection against viral, bacterial, and certain chemical hazards.
Extra thick medical examination gloves - 60mil. Great for extra protection.
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Learn how solar cells transform light into electrical energy with this great kit!
Illuminate both your room and your mind with this ingenious Periodic Table Lamp.
This adapter-powered butterfly uses Flexinor wires to create a realistic visual effect!
Build a hand that realistically moves its fingers using shape memory allow technology!
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