Pumice is far less dense than galena. Galena is one of the densest minerals.
The pumice is not very dense, if the mass of the volume of water displacement is greater than the mass of the rock it will float
Pumice is a porous rock and slat is not. Pumice floats in water because of the air pockets in the rock. Slate is a layer of rock that is tightly packed, or is very "dense".
Porous lava rock is called pumice. If placed in water, it would float as it possesses a density that is less than water.
Scoria and pumice are both volcanic rocks with gas bubbles trapped in their matrix, giving them a similar porous texture. However, scoria is denser than pumice due to its higher iron and magnesium content, which makes it sink in water whereas pumice, being less dense, floats.
Pumice is less dense than scoria. While they both have holes, pumices pore like holes trap air allowing it to float.
Galena is an interesting ore of lead (lead sulfide). It can form in isometric crystals and has perfect 4 direct cleavage forming cubes.
Pumice is porous and filled with gas bubbles, which make it less dense than water and causes it to float. In contrast, a solid rock of similar size is more dense and lacks air pockets, so it sinks in water.
No. In fact it is the most dense planet. The least dense is Saturn.
The metamorphic form of pumice is known as "pumiceite." This form of metamorphic rock is created through intense heat and pressure acting on pumice, which causes it to recrystallize and change its mineral composition. Pumiceite typically has a more compact and dense structure compared to pumice.
One could say that the atmosphere is the least dense, but of the surface the crust is the least dense.
Helium is the least dense element at normal conditions.
'Least' is a comparison word. Compared to iron and lead yes cotton is least dense. Compares to oxygen gas and hydrogen gas, no it is not least dense.