📖 what
What is pumice?
GeologyVolcanology
Quick Answer
Pumice is a light, porous volcanic rock filled with gas bubbles. So many bubbles can be trapped in it that some pieces float on water.
The Full Story
Pumice forms during explosive eruptions when gas-rich magma cools so fast that bubbles are frozen in place. Because it has so many empty spaces, its density can be very low compared with ordinary rock. Pumice is used in abrasives, lightweight concrete, and landscaping. Large pumice rafts can drift across oceans after major eruptions.
Key Facts
1.formed by explosive volcanic eruptions
2.can float because it is very porous
3.used as an abrasive and in lightweight concrete
YouTube Angle
Suggested video title for this topic:
"The rock that can float on water"